Don't Let Your Data Fall into the Wrong Hands: Watch Out for Data Exfiltration Attacks
Tags: cloudsecurity, dataexfiltration, cloud
Published: 2023-03-03 04:49:32


Data is valuable for any organisation, and protecting it is critically important. However, with the increasing adoption of cloud services such as Platform-as-a-Service (PaaS), Software-as-a-Service (SaaS), and Storage-as-a-Service (STaaS), data exfiltration has become a significant concern. Malicious users can exploit vulnerabilities in the cloud infrastructure to gain unauthorised access to sensitive data, potentially leading to devastating consequences for the affected organisation. In this article, we’ll explore the risks of data exfiltration in the cloud and discuss some private networking capabilities cloud providers offer to help organisations protect their data. Whether you’re an organisation using cloud services to store your data or a cloud provider offering such services, this article will provide valuable insights on safeguarding your data from unauthorised access. So, let’s dive in!

## The Risks of Data Exfiltration

Data exfiltration refers to unauthorised data transfer from a network or computer system to another location. This can happen in various ways, such as through hacking, phishing, or malware. Data can be used for malicious purposes such as identity theft, financial fraud, or espionage when it is exfiltrated.

Data exfiltration risks are incredibly high for organisations that use cloud services to store their data. These organisations are vulnerable to various attacks, including insider threats, third-party breaches, and hacking. In fact, according to a  [report by Aqua Security](https://www.aquasec.com/news/aqua-security-researchers-discover-90-percent-of-companies-vulnerable-to-security-breaches-cloud-misconfigurations/), 90% of companies that move to multi-cloud environments are vulnerable to security breaches due to cloud misconfigurations.  [Another report](https://www.marketwatch.com/press-release/data-exfiltration-market-size-global-research-report-2023---2028-2023-02-23)  estimates that the global data exfiltration market size will reach USD 77920 million by 2028 with a CAGR of 6.6%. Cloud misconfigurations are a leading cause of data breaches and can expose companies to critical security risks.

So, why is data exfiltration such a big deal? For starters, it can result in financial losses, legal liabilities, and damage to a company’s reputation. It can also lead to the theft of valuable intellectual property, trade secrets, and customer data. That’s why it’s critically important for organisations to take proactive steps to prevent data exfiltration.

In the next section, we’ll dive deeper into how data exfiltration can occur with PaaS, SaaS, and STaaS services and what organisations can do to protect themselves.

## Data Exfiltration Risks with Platform-as-a-Service (PaaS)

One of the most significant advantages of PaaS is that it allows organisations to focus on their core business applications. The PaaS provider manages the underlying infrastructure, including the operating system, server hardware, and network infrastructure. However, this convenience comes with its own set of risks, particularly when it comes to data exfiltration.

PaaS services such as databases, messaging services, and other application services can be vulnerable to data exfiltration if they are not adequately secured. There are two main scenarios where data exfiltration can occur:

### Scenario 1: Malicious User Exploiting Misconfiguration

In this scenario, a malicious user outside the organisation exploits a misconfiguration in the PaaS service to gain unauthorised access to sensitive data and use the PaaS service to store and exfiltrate data. For example:

-   Suppose an organisation uses a cloud databases service such as Amazon RDS or Azure SQL Database, which isn’t correctly secured with access controls; a malicious user could gain access to sensitive data stored in the database.
-   Suppose an organisation uses messaging services like Simple Queue Service or Azure Service Bus, and the messages are not encrypted. A malicious user could intercept messages sent over the service, gaining access to sensitive information.

To mitigate the risks associated with data exfiltration in this scenario, organisations can use various tools and techniques, such as:

-   **Private Connection:**  This allows organisations to connect to PaaS services over a private IP address rather than the public internet, reducing the risk of data interception and exfiltration.
-   **Endpoint Access Control:**  This enables organisations to control the network traffic to their PaaS services, allowing only traffic from specific virtual networks or services.
-   **Encryption:**  By encrypting data at rest and in transit, organisations can reduce the risk of unauthorised access to their sensitive data.

### Scenario 2: Internal Staff with Malicious Intent

In this scenario, an internal staff member with malicious intent exploits insufficient access controls to gain unauthorised access to sensitive data stored in the PaaS service using their authorised access to exfiltrate data. For example:

-   Suppose an organisation uses a cloud storage service like Amazon S3 or Azure Blob Storage. In that case, employees could upload sensitive data to personal accounts.
-   Suppose an organisation uses a serverless computing service such as Azure Functions, and an employee has access to the function code. In that case, they could add malicious code to the function that exfiltrates data.

To mitigate the risks associated with data exfiltration in this scenario, organisations can use various tools and techniques, such as:

-   **Role-based access control:**  This allows organisations to restrict access to PaaS services based on the employee’s role, reducing the risk of unauthorised access.
-   **Audit logging:**  By enabling audit logging for PaaS services, organisations can track access and usage of their services, helping to detect and prevent unauthorised access or exfiltration of data.
-   **Data Loss Prevention (DLP):**  DLP solutions can help organisations detect and prevent the exfiltration of sensitive data, even if an authorised employee attempts it.

Below, I’ve listed some of the private networking capabilities offered by three major cloud providers — Azure, AWS, and GCP.

| Cloud Provider | Private Networking Capabilities |
|--|--|
| Azure | [Private Endpoints](https://docs.microsoft.com/en-us/azure/private-link/private-endpoints-overview),  [Service Endpoint Policies](https://docs.microsoft.com/en-us/azure/virtual-network/service-endpoints-overview) |
| AWS | [PrivateLink](https://aws.amazon.com/privatelink/),  [VPC Service Controls](https://aws.amazon.com/vpc/service-controls/),  [Private Service Connect](https://aws.amazon.com/vpc/private-service-connect/) |
| GCP | [VPC Service Controls](https://cloud.google.com/vpc-service-controls),  [Private Service Connect](https://cloud.google.com/vpc/docs/private-service-connect) |

By utilising these private networking capabilities, organisations can significantly reduce the risk of data exfiltration from their cloud storage services. However, it’s important to note that no security measure is foolproof, and it’s still essential to implement other security best practices, such as regular security audits, to ensure the safety of your data.

## How SaaS and STaaS Providers Can Help Organizations Prevent Data Exfiltration

SaaS (Software-as-a-Service) and STaaS (Storage-as-a-Service) providers can play a crucial role in helping organisations prevent data exfiltration. By providing advanced security features and controls, these providers can offer a secure environment for storing and accessing sensitive data. Here are some ways in which SaaS and STaaS providers can help organisations prevent data exfiltration:

### Private Networking

SaaS and STaaS providers can offer private networking capabilities allowing organisations to access their services over a private connection, reducing the risk of data interception and exfiltration. Providers may offer features such as private endpoints, private links, or virtual private clouds (VPCs) to enable private networking.

### Role-Based Access Control (RBAC)

RBAC is a security feature restricting data access based on individual users' roles. SaaS and STaaS providers may offer RBAC capabilities that allow organisations to control access to their data and ensure that only authorised users have access.

### Auditing and Logging

Auditing and logging capabilities enable organisations to track user activity and detect suspicious behaviour. SaaS and STaaS providers may offer auditing and logging features that allow organisations to monitor access to their data and identify potential threats.

### Unique FQDN

SaaS and STaaS providers can offer unique, fully qualified domain names (FQDNs) for each organisation that uses their services. This simplifies firewall rules for organisations and restricts access to their data.

SaaS and STaaS providers can help organisations protect their data and prevent data exfiltration with these and other security features. Organisations should carefully evaluate the security capabilities of potential providers before choosing a SaaS or STaaS solution.

## Conclusion:

In conclusion, data is a valuable asset that needs to be protected. Data exfiltration can occur in various ways, including through PaaS, SaaS, and STaaS providers. To prevent data exfiltration, organisations can take proactive steps such as using tools like Private Endpoints and Private Connection, implementing best practices like access control and data encryption, and working with providers that offer robust security features.

By taking these steps, organisations can protect their data assets and ensure their sensitive information remains confidential and secure. So, if you’re using cloud services to store your data or providing such services, ensure you’re taking the necessary steps to prevent data exfiltration and keep your data safe.