Patent Publication Number: US-10785240-B2

Title: Protecting from unintentional malware download

Description:
BACKGROUND 
     1. Field 
     The disclosure relates generally to data processing system protection and more specifically to protecting a data processing system from unintentional malware download. 
     2. Description of the Related Art 
     Malicious software, or malware for short, is any software used to disrupt computer operations, gather sensitive information stored on computers, or gain access to private computer systems and networks, for example. Malware is an umbrella term referring to a variety of hostile or intrusive software, such as, for example, computer viruses, worms, Trojan horses, ransomware, spyware, adware, scareware, and other malicious programs. 
     Malware often gets into an individual&#39;s personal computer or mobile device or into an enterprise&#39;s computer network via an email attachment or a link to a Web site that contains malware. When a user clicks on an attachment in an email, an email program opens the attachment with a program, such as a word processing program. After the program opens the email attachment, the user&#39;s device may become infected with malware if the program that opens the attachment has a vulnerability that an attacker can exploit with a carefully designed attachment. Similarly, when a user clicks on a link to a Web site in an email, the user&#39;s device may become infected if the Web site contains some carefully crafted malware. These malicious attacks, known as phishing attacks when an email casts a wide net to multiple individuals or spear-phishing attacks when an email targets a particular individual, have been a problem for some time. 
     SUMMARY 
     According to one illustrative embodiment, a computer-implemented method for protection from malware download is provided. A data processing system receives a first input to access one of an email attachment or a web site link using an application. The data processing system obtains a newly generated secure virtual machine from one of a network server or a cloud computing service. The data processing system sends the one of the email attachment or the web site link to the newly generated secure virtual machine for processing. According to other illustrative embodiments, a data processing system and computer program product for protection from malware download are provided. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a pictorial representation of a network of data processing systems in which illustrative embodiments may be implemented; 
         FIG. 2  is a diagram of a data processing system in which illustrative embodiments may be implemented; 
         FIG. 3  is a diagram illustrating a cloud computing environment in which illustrative embodiments may be implemented; 
         FIG. 4  is a diagram illustrating an example of abstraction layers of a cloud computing environment in accordance with an illustrative embodiment; 
         FIG. 5  is a diagram of an example of a malware protection system in accordance with an illustrative embodiment; 
         FIG. 6  is a diagram of an example of a secure central processing unit chip in accordance with an illustrative embodiment; and 
         FIG. 7  is a flowchart illustrating a process for protecting a data processing system from unintentional malware download in accordance with an illustrative embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     The present invention may be a system, a method, and/or a computer program product. The computer program product may include a computer readable storage medium (or media) having computer readable program instructions thereon for causing a processor to carry out aspects of the present invention. 
     The computer readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. The computer readable storage medium may be, for example, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. A non-exhaustive list of more specific examples of the computer readable storage medium includes the following: a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanically encoded device such as punch-cards or raised structures in a groove having instructions recorded thereon, and any suitable combination of the foregoing. A computer readable storage medium, as used herein, is not to be construed as being transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission media (e.g., light pulses passing through a fiber-optic cable), or electrical signals transmitted through a wire. 
     Computer readable program instructions described herein can be downloaded to respective computing/processing devices from a computer readable storage medium or to an external computer or external storage device via a network, for example, the Internet, a local area network, a wide area network and/or a wireless network. The network may comprise copper transmission cables, optical transmission fibers, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. A network adapter card or network interface in each computing/processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium within the respective computing/processing device. 
     Computer readable program instructions for carrying out operations of the present invention may be assembler instructions, instruction-set-architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state-setting data, or either source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C++ or the like, and conventional procedural programming languages, such as the “C” programming language or similar programming languages. The computer readable program instructions may execute entirely on the user&#39;s computer, partly on the user&#39;s computer, as a stand-alone software package, partly on the user&#39;s computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user&#39;s computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider). In some embodiments, electronic circuitry including, for example, programmable logic circuitry, field-programmable gate arrays (FPGA), or programmable logic arrays (PLA) may execute the computer readable program instructions by utilizing state information of the computer readable program instructions to personalize the electronic circuitry, in order to perform aspects of the present invention. 
     Aspects of the present invention are described below with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer readable program instructions. 
     These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer program instructions may also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks. 
     The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other device to produce a computer implemented process, such that the instructions which execute on the computer, other programmable apparatus, or other device implement the functions/acts specified in the flowchart and/or block diagram block or blocks. 
     The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts or carry out combinations of special purpose hardware and computer instructions. 
     With reference now to the figures, and in particular, with reference to  FIGS. 1-6 , diagrams of data processing environments are provided in which illustrative embodiments may be implemented. It should be appreciated that  FIGS. 1-6  are only meant as examples and are not intended to assert or imply any limitation with regard to the environments in which different embodiments may be implemented. Many modifications to the depicted environments may be made. 
       FIG. 1  depicts a pictorial representation of a network of data processing systems in which illustrative embodiments may be implemented. Network data processing system  100  is a network of computers and other devices in which the illustrative embodiments may be implemented. Network data processing system  100  contains network  102 , which is the medium used to provide communications links between the computers and the other devices connected together within network data processing system  100 . Network  102  may include connections, such as, for example, wire communication links, wireless communication links, and fiber optic cables. 
     In the depicted example, secure server  104  and secure server  106  connect to network  102 , along with storage  108 . Secure server  104  and secure server  106  may be, for example, server computers with high-speed connections to network  102 . In addition, secure server  104  and secure server  106  may include secure central processing unit technology that is capable of processing encrypted code and data of a secure application internally to protect sensitive information corresponding to the secure application. Further, secure server  104  and secure server  106  may provide services, such as, for example, protecting client devices of subscribing users from unintentional download of malware from an email attachment or a Web site. 
     Client  110 , client  112 , and client  114  also connect to network  102 . Clients  110 ,  112 , and  114  represent subscribing client devices to the malware protection services provided by secure server  104  and secure server  106 . Secure server  104  and secure server  106  also may provide information, such as boot files, operating system images, virtual machine images, and software applications to clients  110 ,  112 , and  114 . 
     Clients  110 ,  112 , and  114  may be data processing systems, such as, for example, network computers, desktop computers, laptop computers, tablet computers, handheld computers, smart phones, smart watches, personal digital assistants, gaming devices, or any combination thereof. However, it should be noted that clients  110 ,  112 , and  114  are intended as examples only. In other words, clients  110 ,  112 , and  114  may represent other types of data processing systems, such as virtual machine environments. A virtual machine environment includes physical resources used to host and execute virtual machines to perform a set of one or more workloads or tasks. A virtual machine environment may comprise, for example, one server, a rack of servers, a cluster of servers, such as a data center, a cloud of computers, such as a private cloud, a public cloud, or a hybrid cloud, or any combination thereof. 
     Storage  108  is a network storage device capable of storing any type of data in a structured format or an unstructured format. Data stored in storage  108  may include, for example, malware protection managers, secure objects, such as secure applications and secure virtual machines, graphical desktop sharing tools, and analytics programs. Further, storage unit  108  may store other types of data, such as authentication or credential data that may include user names, passwords, and biometric data associated with system administrators and registered users. 
     In addition, it should be noted that network data processing system  100  may include any number of additional servers, clients, storage devices, and other devices not shown. Program code located in network data processing system  100  may be stored on a computer readable storage medium and downloaded to a computer or other data processing device for use. For example, program code may be stored on a computer readable storage medium on server  104  and downloaded to client  110  over network  102  for use on client  110 . 
     In the depicted example, network data processing system  100  may be implemented as a number of different types of communication networks, such as, for example, an internet, an intranet, a local area network (LAN), and a wide area network (WAN).  FIG. 1  is intended as an example only, and not as an architectural limitation for the different illustrative embodiments. 
     With reference now to  FIG. 2 , a diagram of a data processing system is depicted in accordance with an illustrative embodiment. Data processing system  200  is an example of a computer, such as secure server  104  or client  110  in  FIG. 1 , in which computer readable program code or instructions implementing processes of illustrative embodiments may be located. In this illustrative example, data processing system  200  includes communications fabric  202 , which provides communications between secure central processor unit  204 , memory  206 , persistent storage  208 , communications unit  210 , input/output (I/O) unit  212 , and display  214 . 
     Secure central processor unit  204  serves to execute instructions for software applications and programs that may be loaded into memory  206 . Secure central processor unit  204  may be a set of one or more hardware processor devices or may be a multi-processor core, depending on the particular implementation. Further, secure central processor unit  204  may be implemented using one or more heterogeneous processor systems, in which a main processor is present with secondary processors on a single chip. As another illustrative example, secure central processor unit  204  may be a symmetric multi-processor system containing multiple processors of the same type. 
     Furthermore, secure central processor unit  204  may execute the instructions for software applications and programs in normal mode  216  or secure mode  218 . When in normal mode  216 , secure central processor unit  204  executes the instructions for software applications and programs as any processor would execute instructions. When in secure mode  218 , secure central processor unit  204  decrypts encrypted code and data of the software applications and programs internally and executes the decrypted code and data to protect the confidentiality and integrity of the code and data. 
     Memory  206  and persistent storage  208  are examples of storage devices  220 . A computer readable storage device is any piece of hardware that is capable of storing information, such as, for example, without limitation, data, computer readable program code in functional form, and/or other suitable information either on a transient basis and/or a persistent basis. Further, a computer readable storage device excludes a propagation medium. Memory  206 , in these examples, may be, for example, a random access memory, or any other suitable volatile or non-volatile storage device. Persistent storage  208  may take various forms, depending on the particular implementation. For example, persistent storage  208  may contain one or more devices. For example, persistent storage  208  may be a hard drive, a flash memory, a rewritable optical disk, a rewritable magnetic tape, or some combination of the above. The media used by persistent storage  208  may be removable. For example, a removable hard drive may be used for persistent storage  208 . 
     In this example, persistent storage  208  stores malware protection manager  222 , secure object  224 , graphical desktop sharing tool  226 , secure virtual machine  228 , and analytics program  230 . Malware protection manager  222  protects data processing system  200  from unintentional download of malware by processing email attachments and Web site content using a set of one or more secure virtual machines executing on secure central processor unit  204 . 
     Secure object  224  may be, for example, a secure application. A secure application consists of: 1) a cryptographically protected area containing encrypted code and data, such as cryptographically protected area  232  containing encrypted code and data  234 ; 2) an integrity tree, such as integrity tree  236 , that protects the integrity of the information in cryptographically protected area  232 ; and 3) an unprotected area that includes a secure central processor unit instruction, such as unprotected area  238  that includes secure central processor unit instruction  240 . Secure central processor unit instruction  240  causes secure central processor unit  204  to enter secure mode  218  when processing encrypted code and data  234  of secure object  224 . Secure central processor unit  204  decrypts and checks the integrity of encrypted code and data  234  as the code and data are brought into secure central processor unit  204  (i.e., into an on-chip cache of secure central processor unit  204 ) from memory  206 . Secure central processor unit instruction  240  includes a cryptographic key for accessing encrypted code and data  234 , as well as, an initial value for integrity tree  236  and secure central processor unit instruction  240  is protected by a system key that is not available to any other software. Cryptographic operations only occur when the cryptographically protected information moves between the on-chip cache and memory  206 . Similarly, checking and updating of integrity values only occur when the cryptographically protected information moves between the on-chip cache and memory  206 . 
     Malware protection manager  222  utilizes graphical desktop sharing tool  226  to remotely control another computer connected to a network. Graphical desktop sharing tool  226  may transmit input device events  242 , such as, for example, keyboard events or mouse events, from data processing system  200  to another computer and receive graphical window updates  244  via the network. 
     Malware protection manager  222  utilizes secure virtual machine  228  to securely process attachment  246  and link  248 . It should be noted that secure virtual machine  228  may be another instance of a secure object, such as secure object  224 . Secure virtual machine  228  is isolated from other virtual machines and executes securely while sharing hardware. Attachment  246  represents an email attachment that a user of data processing system  200  wants to access to view its content. Link  248  represents a link to a Web site that the user of data processing system  200  wants to visit to view its content. However, the email attachment or the Web site may contain malware. Consequently, malware protection manager  222  utilizes secure virtual machine  228  to prevent any malware from infecting data processing system  200 . 
     Malware protection manager  222  utilizes analytics program  230  to examine secure virtual machine  228  to determine whether secure virtual machine  228  has been modified while processing either attachment  246  or link  248  indicating possible presence of malware. Modified secure virtual machine  250  represents secure virtual machine  228  after analytics program  230  determines that secure virtual machine  228  has been modified. Analytics program  230  generates malware report  252 , which corresponds to modified secure virtual machine  250 . Analytics program  230  may send modified secure virtual machine  250  and malware report  252  to a security analyst for further analysis and examination. In addition, analytics program  230  may send malware report  252  to authorities, such as the Federal Bureau of Investigation. 
     Communications unit  210 , in this example, provides for communication with other computers, data processing systems, and devices via a network, such as network  102  in  FIG. 1 . Communications unit  210  may provide communications through the use of both physical and wireless communications links. The physical communications link may utilize, for example, a wire, cable, universal serial bus, or any other physical technology to establish a physical communications link for data processing system  200 . The wireless communications link may utilize, for example, shortwave, high frequency, ultra high frequency, microwave, wireless fidelity (Wi-Fi), bluetooth technology, global system for mobile communications (GSM), code division multiple access (CDMA), second-generation (2G), third-generation (3G), fourth-generation (4G), 4G Long Term Evolution (LTE), LTE Advanced, or any other wireless communication technology or standard to establish a wireless communications link for data processing system  200 . 
     Input/output unit  212  allows for the input and output of data with other devices that may be connected to data processing system  200 . For example, input/output unit  212  may provide a connection for user input through a keypad, a keyboard, a mouse, and/or some other suitable input device. Display  214  provides a mechanism to display information to a user and may include touch screen capabilities to allow the user to make on-screen selections through user interfaces or input data, for example. 
     Instructions for the operating system, applications, and/or programs may be located in storage devices  220 , which are in communication with secure central processor unit  204  through communications fabric  202 . In this illustrative example, the instructions are in a functional form on persistent storage  208 . These instructions may be loaded into memory  206  for running by secure central processor unit  204 . The processes of the different embodiments may be performed by secure central processor unit  204  using computer-implemented instructions, which may be located in a memory, such as memory  206 . These program instructions are referred to as program code, computer usable program code, or computer readable program code that may be read and run by a processor in secure central processor unit  204 . The program instructions, in the different embodiments, may be embodied on different physical computer readable storage devices, such as memory  206  or persistent storage  208 . 
     Program code  254  is located in a functional form on computer readable media  256  that is selectively removable and may be loaded onto or transferred to data processing system  200  for running by secure central processor unit  204 . Program code  254  and computer readable media  256  form computer program product  258 . In one example, computer readable media  256  may be computer readable storage media  260  or computer readable signal media  262 . Computer readable storage media  260  may include, for example, an optical or magnetic disc that is inserted or placed into a drive or other device that is part of persistent storage  208  for transfer onto a storage device, such as a hard drive, that is part of persistent storage  208 . Computer readable storage media  260  also may take the form of a persistent storage, such as a hard drive, a thumb drive, or a flash memory that is connected to data processing system  200 . In some instances, computer readable storage media  260  may not be removable from data processing system  200 . 
     Alternatively, program code  254  may be transferred to data processing system  200  using computer readable signal media  262 . Computer readable signal media  262  may be, for example, a propagated data signal containing program code  254 . For example, computer readable signal media  262  may be an electro-magnetic signal, an optical signal, and/or any other suitable type of signal. These signals may be transmitted over communication links, such as wireless communication links, an optical fiber cable, a coaxial cable, a wire, and/or any other suitable type of communications link. In other words, the communications link and/or the connection may be physical or wireless in the illustrative examples. The computer readable media also may take the form of non-tangible media, such as communication links or wireless transmissions containing the program code. 
     In some illustrative embodiments, program code  254  may be downloaded over a network to persistent storage  208  from another device or data processing system through computer readable signal media  262  for use within data processing system  200 . For instance, program code stored in a computer readable storage media in a data processing system may be downloaded over a network from the data processing system to data processing system  200 . The data processing system providing program code  254  may be a server computer, a client computer, or some other device capable of storing and transmitting program code  254 . 
     The different components illustrated for data processing system  200  are not meant to provide architectural limitations to the manner in which different embodiments may be implemented. The different illustrative embodiments may be implemented in a data processing system including components in addition to, or in place of, those illustrated for data processing system  200 . Other components shown in  FIG. 2  can be varied from the illustrative examples shown. The different embodiments may be implemented using any hardware device or system capable of executing program code. As one example, data processing system  200  may include organic components integrated with inorganic components and/or may be comprised entirely of organic components excluding a human being. For example, a storage device may be comprised of an organic semiconductor. 
     As another example, a computer readable storage device in data processing system  200  is any hardware apparatus that may store data. Memory  206 , persistent storage  208 , and computer readable storage media  260  are examples of physical storage devices in a tangible form. 
     In another example, a bus system may be used to implement communications fabric  202  and may be comprised of one or more buses, such as a system bus or an input/output bus. Of course, the bus system may be implemented using any suitable type of architecture that provides for a transfer of data between different components or devices attached to the bus system. Additionally, a communications unit may include one or more devices used to transmit and receive data, such as a modem or a network adapter. Further, a memory may be, for example, memory  206  or a cache such as found in an interface and memory controller hub that may be present in communications fabric  202 . 
     It should be understood that although this disclosure includes a detailed description on cloud computing, implementation of the teachings recited herein are not limited to a cloud computing environment. Rather, illustrative embodiments are capable of being implemented in conjunction with any other type of computing environment now known or later developed. Cloud computing is a model of service delivery for enabling convenient, on-demand network access to a shared pool of configurable computing resources, such as, for example, networks, network bandwidth, servers, processing, memory, storage, applications, virtual machines, and services, which can be rapidly provisioned and released with minimal management effort or interaction with a provider of the service. This cloud model may include at least five characteristics, at least three service models, and at least four deployment models. 
     The characteristics may include, for example, on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. On-demand self-service allows a cloud consumer to unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with the provider of the service. Broad network access provides for capabilities that are available over a network and accessed through standard mechanisms, which promotes use by heterogeneous thin or thick client platforms, such as, for example, mobile phones, laptops, and personal digital assistants. Resource pooling allows the provider&#39;s computing resources to be pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to demand. There is a sense of location independence in that the consumer generally has no control or knowledge over the exact location of the provided resources, but may be able to specify location at a higher level of abstraction, such as, for example, country, state, or data center. Rapid elasticity provides for capabilities that can be rapidly and elastically provisioned, in some cases automatically, to quickly scale out and rapidly released to quickly scale in. To the consumer, the capabilities available for provisioning often appear to be unlimited and can be purchased in any quantity at any time. Measured service allows cloud systems to automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service, such as, for example, storage, processing, bandwidth, and active user accounts. Resource usage can be monitored, controlled, and reported providing transparency for both the provider and consumer of the utilized service. 
     Service models may include, for example, Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). Software as a Service is the capability provided to the consumer to use the provider&#39;s applications running on a cloud infrastructure. The applications are accessible from various client devices through a thin client interface, such as a web browser (e.g., web-based e-mail). The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, storage, or even individual application capabilities, with the possible exception of limited user-specific application configuration settings. Platform as a Service is the capability provided to the consumer to deploy onto the cloud infrastructure consumer-created or acquired applications created using programming languages and tools supported by the provider. The consumer does not manage or control the underlying cloud infrastructure including networks, servers, operating systems, or storage, but has control over the deployed applications and possibly application hosting environment configurations. Infrastructure as a Service is the capability provided to the consumer to provision processing, storage, networks, and other fundamental computing resources where the consumer is able to deploy and run arbitrary software, which can include operating systems and applications. The consumer does not manage or control the underlying cloud infrastructure, but has control over operating systems, storage, deployed applications, and possibly limited control of select networking components, such as, for example, host firewalls. 
     Deployment models may include, for example, a private cloud, community cloud, public cloud, and hybrid cloud. A private cloud is a cloud infrastructure operated solely for an organization. The private cloud may be managed by the organization or a third party and may exist on-premises or off-premises. A community cloud is a cloud infrastructure shared by several organizations and supports a specific community that has shared concerns, such as, for example, mission, security requirements, policy, and compliance considerations. The community cloud may be managed by the organizations or a third party and may exist on-premises or off-premises. A public cloud is a cloud infrastructure made available to the general public or a large industry group and is owned by an organization selling cloud services. A hybrid cloud is a cloud infrastructure composed of two or more clouds, such as, for example, private, community, and public clouds, which remain as unique entities, but are bound together by standardized or proprietary technology that enables data and application portability, such as, for example, cloud bursting for load-balancing between clouds. 
     A cloud computing environment is service oriented with a focus on statelessness, low coupling, modularity, and semantic interoperability. At the heart of cloud computing is an infrastructure comprising a network of interconnected nodes. 
     With reference now to  FIG. 3 , a diagram illustrating a cloud computing environment is depicted in which illustrative embodiments may be implemented. In this illustrative example, cloud computing environment  300  includes a set of one or more cloud computing nodes  310  with which local data processing systems used by cloud consumers may communicate. Cloud computing nodes  310  may be, for example, server  104  and server  106  in  FIG. 1 . Local data processing systems that communicate with cloud computing nodes  310  include data processing system  320 A, which may be a personal digital assistant or a smart phone, data processing system  320 B, which may be a desktop computer or a network computer, data processing system  320 C, which may be a laptop computer, and data processing system  320 N, which may be a computer system of an automobile. Data processing systems  320 A- 320 N may be, for example, clients  110 - 114  in  FIG. 1 . 
     Cloud computing nodes  310  may communicate with one another and may be grouped physically or virtually into one or more cloud computing networks, such as a private cloud computing network, a community cloud computing network, a public cloud computing network, or a hybrid cloud computing network. This allows cloud computing environment  300  to offer infrastructure, platforms, and/or software as services without requiring the cloud consumers to maintain these resources on their local data processing systems, such as data processing systems  320 A- 320 N. It is understood that the types of data processing devices  320 A- 320 N are intended to be examples only and that cloud computing nodes  310  and cloud computing environment  300  can communicate with any type of computerized device over any type of network and/or network addressable connection using a web browser, for example. 
     With reference now to  FIG. 4 , a diagram illustrating an example of abstraction layers of a cloud computing environment is depicted in accordance with an illustrative embodiment. The set of functional abstraction layers shown in this illustrative example may be implemented in a cloud computing environment, such as cloud computing environment  300  in  FIG. 3 . Also, it should be noted that the layers, components, and functions shown in  FIG. 4  are intended to be examples only and not intended to be limitations on illustrative embodiments. 
     In this example, abstraction layers of a cloud computing environment  400  includes hardware and software layer  402 , virtualization layer  404 , management layer  406 , and workloads layer  408 . Hardware and software layer  402  includes the hardware and software components of the cloud computing environment. The hardware components may include, for example, mainframes  410 , RISC (Reduced Instruction Set Computer) architecture-based servers  412 , servers  414 , blade servers  416 , storage devices  418 , and networks and networking components  420 . In some illustrative embodiments, software components may include, for example, network application server software  422  and database software  424 . 
     Virtualization layer  404  provides an abstraction layer from which the following examples of virtual entities may be provided: virtual servers  426 ; virtual storage  428 ; virtual networks  430  including virtual private networks; virtual applications and operating systems  432 ; and secure virtual machines  434 . 
     Management layer  406  may provide a plurality of different management functions, such as, for example, resource provisioning  436 , metering and pricing  438 , security and user portal  440 , service level management  442 , and secure virtual machine environment management  444 . Resource provisioning  436  dynamically procures computing resources and other resources, which are utilized to perform workloads or tasks within the cloud computing environment. Metering and pricing  438  provides cost tracking as resources are utilized within the cloud computing environment and billing for consumption of these resources. In one example, these resources may comprise application software licenses. Security of security and user portal  440  provides identity verification for cloud consumers and workloads, as well as protection for data and other resources. User portal of security and user portal  440  provides access to the cloud computing environment for cloud consumers and system administrators. Service level management  442  provides cloud computing resource allocation and management such that required service levels are met based on service level agreements. Secure virtual machine environment management  444  provides management of secure virtual machine processing of email attachments and Web site links. 
     Workloads layer  408  provides the functionality of the cloud computing environment. Example workloads and functions provided by workload layer  408  may include mapping and navigation  446 , software development and lifecycle management  448 , virtual classroom education delivery  450 , data analytics processing  452 , transaction processing  454 , and protecting data processing systems from unintentional malware downloads  456 . 
     In the course of developing illustrative embodiments, it was discovered that malicious attacks, such as phishing attacks and spear-phishing attacks, can be addressed using a cloud computing service that protects individuals and enterprises from unintentional downloading of malware into their data processing systems. Illustrative embodiments use secure central processor unit technology that protects the confidentiality and integrity of information in a secure object, which may be, for example, a secure application or a secure virtual machine, from all other software on a data processing system including privileged software. Privileged software may include, for example, operating systems, device drivers, and applications running with root privileges, which may also include malware that obtained root privilege by exploiting a vulnerability in the privileged software. Illustrative embodiments utilize the secure central processor unit technology in a cloud computing service environment to protect an individual&#39;s or an enterprise&#39;s data processing system devices, which may include, for example, computers and mobile devices, from unintentional downloading of malware that may occur when a user of a data processing system either opens an attachment in an email or activates a link to visit a Web site in an email. 
     A secure object includes cryptographically protected information, such as code and data, which is encrypted for security purposes. The secure central processor unit enters a secure mode while processing the secure object and places the encrypted code and data into an on-chip cache from an external memory that is outside of the secure central processor unit. While in the secure mode, the secure central processor unit decrypts the encrypted code and data inside the secure central processor unit and checks for integrity of the code and data using an integrity tree, for example. As a result, the other software on the data processing system cannot access or undetectably tamper with the information in the secure object. 
     Illustrative embodiments leverage the use of: 1) secure central processor unit technology; 2) secure servers based on the secure central processor unit technology; 3) virtualization technology that the secure servers utilize to provide secure virtual machines, each virtual machine protected from all other software on the secure servers; 4) a cloud computing service environment that allows a subscribing user to generate, use, de-allocate, and discard secure virtual machines as needed; and 5) a graphical desktop sharing tool that allows the subscribing user on a client device to interact with an application running on a secure virtual machine in the cloud computing service environment. The graphical desktop sharing tool allows the subscribing user to access attachments or Web site links that are contained in an email received by the client device without exposing the user&#39;s client device to malware by having an application running on a secure virtual machine in a secure server in the cloud computing service environment open the attachments or Web sites. The client device may be, for example, a desktop computer, a laptop computer, or a mobile device, such as a smart phone, smart watch, a handheld computer, or gaming device connected to a network. 
     When a subscribing user of the cloud computing service attempts to open an email attachment or visit a Web site corresponding to a link within an email, the email application on the subscribing user&#39;s client device: 1) obtains a newly generated secure virtual machine from the cloud computing service environment; 2) opens a graphical window to the newly generated secure virtual machine using a graphical desktop sharing tool that transmits input device events, such as, for example, keyboard and mouse events, from the subscribing user&#39;s client device to the newly generated secure virtual machine and receives graphical window updates from the newly generated secure virtual machine; 3) sends the email attachment or the Web site link to the newly generated secure virtual machine; 4) accesses the email attachment or the Web site on the newly generated secure virtual machine; 5) allows the subscribing user to interact with the email attachment or the Web site via the graphical window to the newly generated secure virtual machine using, for example, keypad inputs or touch screen inputs on the subscribing user&#39;s client device; and 5) de-allocates and discards the newly generated secure virtual machine in response to the subscribing user closing the email attachment or the Web site. 
     Thus, illustrative embodiments allow a subscribing user to access an email attachment, but if the email attachment contains malware, illustrative embodiments confine the malware to a newly generated secure virtual machine that is discarded when the user closes the email attachment. Similarly, if the subscribing user activates a Web site link in an email by, for example, a mouse click, a secure application on the subscribing user&#39;s client device arranges for the subscribing user to browse the Web site using a browser running on a newly generated secure virtual machine that the subscribing user accesses through a graphical window. Then, if the Web site downloads some form of malware, illustrative embodiments confine the malware download to the newly generated secure virtual machine and discard the newly generated secure virtual machine when the subscribing user leaves the Web site. 
     An alternative illustrative embodiment may open an email attachment on the subscribing user&#39;s client device if the email attachment is signed by a trusted party and open the email attachment on a newly generated secure virtual machine if the email attachment is not signed by a trusted party. Similarly, an alternative illustrative embodiment may launch a browser on the subscribing user&#39;s client device to visit a Web site if the Web site is a trusted Web site and launch a browser on a newly generated secure virtual machine if the Web site is not a trusted Web site. Illustrative embodiments may modify a browser program so that the browser program browses un-trusted or external Web sites via a newly generated secure virtual machine, while browsing trusted Web sites directly from a subscribing user&#39;s client device. 
     When illustrative embodiments de-allocate a newly generated secure virtual machine after a subscribing user closes an email attachment or leaves a Web site, illustrative embodiments may send the de-allocated secure virtual machine to an analytics program to determine whether the de-allocated secure virtual machine was modified while processing the email attachment or visiting the Web site. If the analytics program determines that the de-allocated secure virtual machine was modified, the analytics program may send the email attachment or Web site link to security analysts for a more detailed, in-depth analysis and to appropriate law enforcement authorities. 
     Because the secure central processor unit technology protects the integrity of a secure object, which also is described in one or more of the related applications incorporated herein by reference, each newly allocated secure virtual machine runs exactly the software that the cloud computing service provider intends. As a result, a subscribing user may know with a high level of confidence that a newly allocated secure virtual machine that illustrative embodiments generate for a subscribing user is unadulterated and free of malware when provided to the user. The secure central processor unit technology protects the integrity of a newly generated secure virtual machine from other software even if the other software in the cloud computing service environment, which may include privileged software, such as a hypervisor, operating system, or device driver, has been compromised. 
     Illustrative embodiments by utilizing the secure central processor unit technology and the secure virtual machine technology, a subscribing user may know with a high level of confidence that a newly generated secure virtual machine, which illustrative embodiments allocate to the subscribing user to process an email attachment or visit a Web site, does not contain malware, such as, for example, spyware that may “snoop” sensitive information located on a client device of the subscribing user and send that sensitive information to an unknown third party. In addition, by illustrative embodiments utilizing the secure central processor unit technology and the secure virtual machine technology, a subscribing user may know with a high level of confidence that any public cryptographic keys or digital certificates, which a newly generated secure virtual machine may use to validate the identity of other servers, have not been compromised. It is important for a subscribing user to know that the public cryptographic keys or digital certificates have not been compromised because it allows the user to know that the user really is connected to a Web site corresponding to the user&#39;s bank, for example, and not to a fraudulent bank Web site that an imposter has set up to appropriate bank account information. 
     Further, by illustrative embodiments utilizing the secure central processor unit technology and the secure virtual machine technology, a subscribing user may know with a high level of confidence that any sensitive information of the subscribing user that a newly generated secure virtual machine processes will not be accessible by any other software running on the cloud computing service environment, even if privileged software, such as a hypervisor, has been compromised in the cloud computing service environment. 
     Furthermore, when illustrative embodiments de-allocate a newly generated secure virtual machine after a subscribing user has finished using the newly generated secure virtual machine, the secure central processor unit technology enables accurate analysis of the de-allocated secure virtual machine to determine whether an email attachment or a Web site that the secure virtual machine accessed had downloaded any malware. Because the secure central processor unit technology protects the integrity of a newly generated secure virtual machine from other software, a subscribing user can know: 1) exactly what was in the newly generated secure virtual machine when the newly generated secure virtual machine was allocated to process an email attachment or visit a Web site corresponding to a link contained within an email; and 2) when the newly generated secure virtual machine was de-allocated, that any difference in the newly generated secure virtual machine from the norm after de-allocation is a result of processing the email attachment or visiting the Web site. Illustrative embodiments may send this information to security analysts for a more in-depth analysis, which may be used, for example, to fix software bugs or to blacklist Web sites or sources of emails containing attachments. Illustrative embodiments also may send this information to appropriate law enforcement authorities, such as, for example, the Federal Bureau of Investigation. 
     With reference now to  FIG. 5 , a diagram of an example of a malware protection system is depicted in accordance with an illustrative embodiment. Malware protection system  500  protects client devices from unintentional malware download. Malware protection system  500  may be implemented in a network of data processing systems, such as network data processing system  100  in  FIG. 1 . 
     In this example, malware protection system  500  includes cloud computing environment  502  and client  504 . Cloud computing environment  502  may be, for example, cloud computing environment  300  in  FIG. 3 . In addition, cloud computing environment  502  may be, for example, a public cloud, a private cloud, or a hybrid cloud. Client  504  may be, for example, client  110  in  FIG. 1 . Even though client  504  is shown as a laptop computer in this example, it should be noted that client  504  may represent any type of data processing system, such as a network computer, a desktop computer, a tablet computer, a smart phone, a smart watch, or a gaming device. 
     Cloud computing environment  502  includes secure server  506 . Secure server  506  may be, for example, secure server  104  in  FIG. 1  or data processing system  200  in  FIG. 2 . In addition, secure server  506  may represent any number of secure servers in cloud computing environment  502 . Secure server  506  includes secure central processor unit  508 , such as secure central processor unit  204  in  FIG. 2 . 
     Secure virtual machine  510  executes on secure central processor unit  508 . Secure virtual machine  510  may be, for example, secure virtual machine  228  in  FIG. 2 . In addition, application  512 , which is used to open and process an email attachment or web link, runs on secure virtual machine  510 . A user of client  504  interacts with application  512  via graphical desktop sharing tool  514 . Graphical desktop sharing tool  514  may be, for example, graphical desktop sharing tool  226  in  FIG. 2 . Any malware downloaded to secure virtual machine  510  in processing an email attachment or a web site link is discarded when the user closes the email attachment or Web site link at  516 . 
     Cloud computing environment  502  also includes secure virtual machines  518 . Cloud computing environment  502  may utilize secure virtual machines  518  to process other email attachments or Web site links for secure application  512 . However, it should be noted that secure virtual machine  510  may process a set of one or more attachments in an email and/or a set of one or more links to Web sites in the email. 
     With reference now to  FIG. 6 , a diagram of an example of a secure central processing unit chip is depicted in accordance with an illustrative embodiment. Secure central processing unit chip  600  may be implemented in, for example, a data processing system, such as data processing system  200  in  FIG. 2  or secure server  506  in  FIG. 5 . Secure central processing unit chip  600  may be, for example, secure central processor unit  204  in  FIG. 2  or secure central processor unit  508  in  FIG. 5 . 
     Secure central processing unit chip  600  includes central processor unit core  602  and on-chip caches and cryptography  604 . On-chip caches and cryptography  604  protect the confidentiality and integrity of information in secure object  606 . Secure object  606  may be, for example, secure object  224  that includes encrypted code and data  234  in cryptographically protected area  232  in  FIG. 2 . Secure object  606  is stored in external memory  608 , such as memory  206  in  FIG. 2 . Secure object  606 &#39;s code and data are encrypted in external memory  608  outside of secure central processor unit chip  600  at  610 . Secure object  606 &#39;s code and data are decrypted and visible in the clear in central processor unit core  602 , but only when central processor unit core  602  is executing secure object  606  at  612 . 
     When secure object  606 &#39;s information is outside secure central processor unit chip  600 , secure object  606 &#39;s information is encrypted under cryptographic keys that are not available to any other software. When secure object  606 &#39;s information is inside secure central processor unit chip  600  (e.g., in on-chip caches  604 ), secure object  606 &#39;s information is visible in the clear, but context labels prevent other software from accessing or tampering with that information. Secure central processor unit chip  600  uses an integrity tree, such as integrity tree  236  in  FIG. 2 , to detect tampering of secure object  606 &#39;s information. 
     Because secure object  606 &#39;s information is encrypted whenever it is outside secure central processor unit chip  600  and because other software cannot access the decrypted information inside central processor unit core  602 , the other software can only see the encrypted form of secure object  606 &#39;s information. Thus, illustrative embodiments protect secure object  606 &#39;s information from all other software on the data processing system including privileged software, such as operating systems, device drivers, or applications running with root privileges, which includes malware that obtained root privileges by exploiting a vulnerability in the privileged software. 
     With reference now to  FIG. 7 , a flowchart illustrating a process for protecting a data processing system from unintentional malware download is shown in accordance with an illustrative embodiment. The process shown in  FIG. 7  may be implemented in a data processing system, such as, for example, server  104  or client  110  in  FIG. 1  and data processing system  200  in  FIG. 2 . 
     The process begins when the data processing system receives a first input to access one of an email attachment or a web site link using an email application (step  702 ). The data processing system obtains a newly generated secure virtual machine from one of a network server or a cloud computing service (step  704 ). The data processing system sends the one of the email attachment or the web site link to the newly generated secure virtual machine for processing (step  706 ). 
     The data processing system opens a graphical window to the newly generated secure virtual machine using a graphical desktop sharing tool (step  708 ). The data processing system sends a set of input device events performed on the data processing system to the newly generated secure virtual machine (step  710 ). The data processing system receives updates to the graphical window from the newly generated secure virtual machine based on the set of input device events (step  712 ). 
     The data processing system opens the one of the email attachment or the web site link on the newly generated secure virtual machine (step  714 ). The data processing system allows access to content of the one of the email attachment or the web site link opened on the newly generated secure virtual machine via the set of input device events on the data processing system using the graphical desktop sharing tool (step  716 ). The data processing system de-allocates and discards the newly generated secure virtual machine in response to receiving a second input to close the one of the email attachment or the web site link opened on the newly generated secure virtual machine (step  718 ). 
     The data processing system analyzes the discarded secure virtual machine for modification by malware (step  720 ). The data processing system generates a malware report in response to determining that the discarded secure virtual machine was modified by malware (step  722 ). The data processing system sends the malware report and the modified secure virtual machine to a security analyst for analysis and possible action (step  724 ). 
     Thus, illustrative embodiments of the present invention provide a computer-implemented method, data processing system, and computer program product for protecting a data processing system from unintentional malware download using secure virtual machines and secure central processing units. The descriptions of the various embodiments of the present invention have been presented for purposes of illustration, but are not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiment. The terminology used herein was chosen to best explain the principles of the embodiment, the practical application or technical improvement over technologies found in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed here. 
     The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.