alirezaaminzadeh/secembed-pairs huggingface dataset:
Query: alert when Detects creation of files with specific name patterns seen used in various tools that export the NTDS.DIT for exfiltrati
Matching passage: Sigma rule: Detects creation of files with specific name patterns seen used in various tools that export the NTDS.DIT for exfiltrati. Logsource: windows / file_event. Rule: title: NTDS Exfiltration Filename Patterns id: 3a8da4e0-36c1-40d2-8b29-b3e890d5172a status: test description: Detects creation of files with specific name patterns seen used in various tools that export the NTDS.DIT for exfiltration. references: - https://github.com/rapid7/metasploit-framework/blob/eb6535009f5fdafa954525687f09294918b5398d/modules/post/windows/gather/ntds_grabber.rb - https://github.com/rapid7/metasploit-framework/blob/eb6535009f5fdafa954525687f09294918b5398d/data/post/powershell/NTDSgrab.ps1 - https://github.com/SecureAuthCorp/impacket/blob/7d2991d78836b376452ca58b3d14daa61b67cb40/impacket/examples/secretsdump.py#L2405 author: Florian Roth (Nextron Systems) date: 2022-03-11 modified: 2023-05-05 tags: - attack.credential-access - attack.t1003.003 logsource: product: windows category: file_event detection: selection: TargetFilename|endswith: - \All.cab - .ntds.cleartext condition: selection falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects the execution of the PUA/Recon tool Seatbelt via PE information of command line parameters. Logsource: windows / process_creation. Rule: title: PUA - Seatbelt Execution id: 38646daa-e78f-4ace-9de0-55547b2d30da status: test description: Detects the execution of the PUA/Recon tool Seatbelt via PE information of command line parameters references: - https://github.com/GhostPack/Seatbelt - https://www.bluetangle.dev/2022/08/fastening-seatbelt-on-threat-hunting.html author: Nasreddine Bencherchali (Nextron Systems) date: 2022-10-18 modified: 2023-02-04 tags: - attack.discovery - attack.t1526 - attack.t1087 - attack.t1083 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \Seatbelt.exe - OriginalFileName: Seatbelt.exe - Description: Seatbelt - CommandLine|contains: - ' DpapiMasterKeys' - ' InterestingProcesses' - ' InterestingFiles' - ' CertificateThumbprints' - ' ChromiumBookmarks' - ' ChromiumHistory' - ' ChromiumPresence' - ' CloudCredentials' - ' CredEnum' - ' CredGuard' - ' FirefoxHistory' - ' ProcessCreationEvents' selection_group_list: CommandLine|contains: - ' -group=misc' - ' -group=remote' - ' -group=chromium' - ' -group=slack' - ' -group=system' - ' -group=user' - ' -group=all' selection_group_output: CommandLine|contains: ' -outputfile=' condition: selection_img or all of selection_group_* falsepositives: - Unlikely level: high
Query: alert when Detects keywords that could indicate clearing PowerShell history
Matching passage: Sigma rule: Detects keywords that could indicate clearing PowerShell history. Logsource: windows / ps_module. Rule: title: Clear PowerShell History - PowerShell Module id: f99276ad-d122-4989-a09a-d00904a5f9d2 related: - id: dfba4ce1-e0ea-495f-986e-97140f31af2d type: derived status: test description: Detects keywords that could indicate clearing PowerShell history references: - https://gist.github.com/hook-s3c/7363a856c3cdbadeb71085147f042c1a author: Ilyas Ochkov, Jonhnathan Ribeiro, Daniil Yugoslavskiy, oscd.community date: 2019-10-25 modified: 2022-12-02 tags: - attack.stealth - attack.t1070.003 logsource: product: windows category: ps_module definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b detection: selection_1a_payload: Payload|contains: - del - Remove-Item - rm selection_1b_payload: Payload|contains: (Get-PSReadlineOption).HistorySavePath selection_payload_2: Payload|contains|all: - Set-PSReadlineOption - –HistorySaveStyle - SaveNothing selection_payload_3: Payload|contains|all: - Set-PSReadlineOption - -HistorySaveStyle - SaveNothing condition: 1 of selection_payload_* or all of selection_1* falsepositives: - Legitimate PowerShell scripts level: medium
Near-miss passage: Sigma rule: Detects anyone attempting a backup for the DPAPI Master Key. This events gets generated at the source and not the Domain. Logsource: windows / security. Rule: title: DPAPI Domain Master Key Backup Attempt id: 39a94fd1-8c9a-4ff6-bf22-c058762f8014 status: test description: Detects anyone attempting a backup for the DPAPI Master Key. This events gets generated at the source and not the Domain Controller. references: - https://threathunterplaybook.com/hunts/windows/190620-DomainDPAPIBackupKeyExtraction/notebook.html author: Roberto Rodriguez @Cyb3rWard0g date: 2019-08-10 modified: 2023-03-15 tags: - attack.credential-access - attack.t1003.004 logsource: product: windows service: security detection: selection: EventID: 4692 condition: selection falsepositives: - If a computer is a member of a domain, DPAPI has a backup mechanism to allow unprotection of the data. Which will trigger this event. level: medium
Query: explain CWE-655
Matching passage: CWE-655 Insufficient Psychological Acceptability. The product has a protection mechanism that is too difficult or inconvenient to use, encouraging non-malicious users to disable or bypass the mechanism, whether by accident or on purpose.
Near-miss passage: CWE-115 Misinterpretation of Input. The product misinterprets an input, whether from an attacker or another product, in a security-relevant fashion.
Query: patch priority for CVE-2015-3226
Matching passage: CVE-2015-3226. CWE: CWE-79. CVSS: 4.300000190734863. Cross-site scripting (XSS) vulnerability in json/encoding.rb in Active Support in Ruby on Rails 3.x and 4.1.x before 4.1.11 and 4.2.x before 4.2.2 allows remote attackers to inject arbitrary web script or HTML via a crafted Hash that is mishandled during JSON encoding.
Near-miss passage: CVE-2015-7453. CWE: CWE-79. CVSS: 6.099999904632568. Cross-site scripting (XSS) vulnerability in IBM Rational Collaborative Lifecycle Management (CLM) 3.0.1 before 3.0.1.6 iFix7 Interim Fix 1, 4.0.x before 4.0.7 iFix10, 5.0.x before 5.0.2 iFix15, and 6.0.x before 6.0.1 iFix4; Rational Quality Manager (RQM) 3.0.x before 3.0.1.6 iFix7 Interim Fix 1, 4.0.x before 4.0.7 iFix10, 5.0.x before 5.0.2 iFix15, and 6.0.x before 6.0.1 iFix4; Rational Team Concert (RTC) 3.0.x before 3.0.1.6 iFix7 Interim Fix 1, 4.0.x before 4.0.7 iFix10, 5.0.x before 5.0.2 iFix15, and 6.0.x before 6.0.1 iFix4; Rational Requirements Composer (RRC) 3.0.x before 3.0.1.6 iFix7 Interim Fix 1 and 4.0.x before 4.0.7 iFix10; Rational DOORS Next Generation (RDNG) 4.0.x before 4.0.7 iFix10, 5.0.x before 5.0.2 iFix15, and 6.0.x before 6.0.1 iFix4; Rational Engineering Lifecycle Manager (RELM) 4.0.3, 4.0.4, 4.0.5, 4.0.6, and 4.0.7 before iFix10, 5.0.x before 5.0.2 iFix1, and 6.0.x before 6.0.2; Rational Rhapsody Design Manager (Rhapsody DM) 4.0.x before 4.0.7 iFix10, 5.0.x before 5.0.2 iFix15, and 6.0.x before 6.0.1 iFix4; and Rational Software Architect Design Manager (RSA DM) 4.0.x before 4.0.7 iFix10, 5.0.x before 5.0.2 iFix15, and 6.0.x before 6.0.1 iFix4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors. IBM X-Force ID: 108296.
Query: Lateral movement indicators for Scanning IP Blocks
Matching passage: T1595.001 Scanning IP Blocks. Tactics: reconnaissance. Description: Adversaries may scan victim IP blocks to gather information that can be used during targeting. Public IP addresses may be allocated to organizations by block, or a range of sequential addresses. Adversaries may scan IP blocks in order to [Gather Victim Network Information](https://attack.mitre.org/techniques/T1590), such as which IP addresses are actively in use as well as more detailed information about hosts assigned these addresses. Scans may range from simple pings (ICMP requests and responses) to more nuanced scans that may reveal host software/versions via server banners or other network artifacts.(Citation: Botnet Scan) Information from these scans may reveal opportunities for other forms of reconnaissance (ex: [Search Open Websites/Domains](https://attack.mitre.org/techniques/T1593) or [Search Open Technical Databases](https://attack.mitre.org/techniques/T1596)), establishing operational resources (ex: [Develop Capabilities](https://attack.mitre.org/techniques/T1587) or [Obtain Capabilities](https://attack.mitre.org/techniques/T1588)), and/or initial access (ex: [External Remote Services](https://attack.mitre.org/techniques/T1133)).
Near-miss passage: T1595 Active Scanning. Tactics: reconnaissance. Description: Adversaries may execute active reconnaissance scans to gather information that can be used during targeting. Active scans are those where the adversary probes victim infrastructure via network traffic, as opposed to other forms of reconnaissance that do not involve direct interaction. Adversaries may perform different forms of active scanning depending on what information they seek to gather. These scans can also be performed in various ways, including using native features of network protocols such as ICMP.(Citation: Botnet Scan)(Citation: OWASP Fingerprinting) Information from these scans may reveal opportunities for other forms of reconnaissance (ex: [Search Open Websites/Domains](https://attack.mitre.org/techniques/T1593) or [Search Open Technical Databases](https://attack.mitre.org/techniques/T1596)), establishing operational resources (ex: [Develop Capabilities](https://attack.mitre.org/techniques/T1587) or [Obtain Capabilities](https://attack.mitre.org/techniques/T1588)), and/or initial access (ex: [External Remote Services](https://attack.mitre.org/techniques/T1133) or [Exploit Public-Facing Application](https://attack.mitre.org/techniques/T1190)).
Query: exploit Unspecified vulnerability in Oracle Java SE 6u101, 7u85, and 8u60, and Java SE Embedded 8u51, allows remote attackers to affect confidentiality via vectors related to RMI.
Matching passage: CVE-2015-4903. CWE: UNKNOWN. CVSS: 5.0. Unspecified vulnerability in Oracle Java SE 6u101, 7u85, and 8u60, and Java SE Embedded 8u51, allows remote attackers to affect confidentiality via vectors related to RMI.
Near-miss passage: CVE-2015-0510. CWE: UNKNOWN. CVSS: 4.300000190734863. Unspecified vulnerability in the Oracle Commerce Platform component in Oracle Commerce Platform 9.4, 10.0, and 10.2 allows remote attackers to affect integrity via vectors related to Dynamo Application Framework - HTML Admin User Interface.
Query: risk of The WebApplications Identity Management subsystem in Cisco Unified Communications Manager 10.5(0.98000.88) allows remote attackers to cause a denial of service (subsystem outage) v
Matching passage: CVE-2015-6425. CWE: CWE-399. CVSS: 5.0. The WebApplications Identity Management subsystem in Cisco Unified Communications Manager 10.5(0.98000.88) allows remote attackers to cause a denial of service (subsystem outage) via invalid session tokens, aka Bug ID CSCul83786.
Near-miss passage: CVE-2015-0015. CWE: CWE-399. CVSS: 7.800000190734863. Microsoft Windows Server 2003 SP2, Server 2008 SP2 and R2 SP1, and Server 2012 Gold and R2 allow remote attackers to cause a denial of service (system hang and RADIUS outage) via crafted username strings to (1) Internet Authentication Service (IAS) or (2) Network Policy Server (NPS), aka "Network Policy Server RADIUS Implementation Denial of Service Vulnerability."
Query: CVE similar to CVE-2015-8521
Matching passage: CVE-2015-8521. CWE: CWE-119. CVSS: 9.800000190734863. Buffer overflow in the server in IBM Tivoli Storage Manager FastBack 5.5.x and 6.x before 6.1.12.2 allows remote attackers to execute arbitrary code via a crafted command, a different vulnerability than CVE-2015-8519, CVE-2015-8520, and CVE-2015-8522.
Near-miss passage: CVE-2015-6974. CWE: CWE-119. CVSS: 9.300000190734863. IOHIDFamily in Apple iOS before 9.1, OS X before 10.11.1, and watchOS before 2.0.1 allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.
Query: exploit Multiple SQL injection vulnerabilities in Fiyo CMS 2.0_1.9.1 allow remote attackers to execute arbitrary SQL commands via the (1) id parameter to apps/app_article/controller/rating
Matching passage: CVE-2015-3934. CWE: CWE-89. CVSS: 9.800000190734863. Multiple SQL injection vulnerabilities in Fiyo CMS 2.0_1.9.1 allow remote attackers to execute arbitrary SQL commands via the (1) id parameter to apps/app_article/controller/rating.php or (2) user parameter to user/login.
Near-miss passage: CVE-2015-0580. CWE: CWE-89. CVSS: 6.5. Multiple SQL injection vulnerabilities in the ACS View reporting interface pages in Cisco Secure Access Control System (ACS) before 5.5 patch 7 allow remote authenticated administrators to execute arbitrary SQL commands via crafted HTTPS requests, aka Bug ID CSCuq79027.
Query: risk of Directory traversal vulnerability in Contao before 3.2.19, and 3.4.x before 3.4.4 allows remote authenticated "back end" users to view files outside their file mounts or the docume
Matching passage: CVE-2015-0269. CWE: CWE-22. CVSS: 4.300000190734863. Directory traversal vulnerability in Contao before 3.2.19, and 3.4.x before 3.4.4 allows remote authenticated "back end" users to view files outside their file mounts or the document root via unspecified vectors.
Near-miss passage: CVE-2015-0171. CWE: CWE-22. CVSS: 5.5. Directory traversal vulnerability in IBM Security SiteProtector System 3.0 before 3.0.0.7, 3.1 before 3.1.0.4, and 3.1.1 before 3.1.1.2 allows remote authenticated users to write to arbitrary files via unspecified vectors.
Query: vulnerability: Multiple cross-site request forgery (CSRF) vulnerabilities in admin.php in ferretCMS 1.0.4-alpha allow remote attackers to hijack the authentication of administrators for requests 
Matching passage: CVE-2015-1374. CWE: CWE-352. CVSS: 6.800000190734863. Multiple cross-site request forgery (CSRF) vulnerabilities in admin.php in ferretCMS 1.0.4-alpha allow remote attackers to hijack the authentication of administrators for requests that conduct (1) cross-site scripting (XSS), (2) SQL injection, or (3) unrestricted file upload attacks.
Near-miss passage: CVE-2015-3380. CWE: CWE-352. CVSS: 5.800000190734863. Multiple cross-site request forgery (CSRF) vulnerabilities in the Feature Set module for Drupal allow remote attackers to hijack the authentication of administrators for requests that (1) enable or (2) disable a module via unspecified vectors.
Query: vulnerability: Cross-site scripting (XSS) vulnerability in JSP/MySQL Administrador Web 1 allows remote attackers to inject arbitrary web script or HTML via the bd parameter to sys/sys/listaBD2.js
Matching passage: CVE-2015-6945. CWE: CWE-79. CVSS: 4.300000190734863. Cross-site scripting (XSS) vulnerability in JSP/MySQL Administrador Web 1 allows remote attackers to inject arbitrary web script or HTML via the bd parameter to sys/sys/listaBD2.jsp.
Near-miss passage: CVE-2015-0762. CWE: CWE-79. CVSS: 4.300000190734863. Cross-site scripting (XSS) vulnerability in the management interface in Cisco Unified MeetingPlace 8.6(1.2) and 8.6(1.9) for Microsoft Outlook allows remote attackers to inject arbitrary web script or HTML via a crafted value in a URL, aka Bug ID CSCuu51400.
Query: CVE similar to CVE-2015-1646
Matching passage: CVE-2015-1646. CWE: CWE-264. CVSS: 4.300000190734863. Microsoft XML Core Services (aka MSXML) 3.0 allows remote attackers to bypass the Same Origin Policy and obtain sensitive information via a crafted DTD, aka "MSXML3 Same Origin Policy SFB Vulnerability."
Near-miss passage: CVE-2015-3027. CWE: CWE-264. CVSS: 5.0. Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program.
Query: Sigma rule for Detects when a repository is exempted from secret scanning feature.
Matching passage: Sigma rule: Detects when a repository is exempted from secret scanning feature.. Logsource: bitbucket / audit. Rule: title: Bitbucket Secret Scanning Exempt Repository Added id: b91e8d5e-0033-44fe-973f-b730316f23a1 status: test description: Detects when a repository is exempted from secret scanning feature. references: - https://confluence.atlassian.com/bitbucketserver/audit-log-events-776640423.html - https://confluence.atlassian.com/bitbucketserver/secret-scanning-1157471613.html author: Muhammad Faisal (@faisalusuf) date: 2024-02-25 tags: - attack.defense-impairment - attack.t1685 logsource: product: bitbucket service: audit definition: 'Requirements: "Basic" log level is required to receive these audit events.' detection: selection: auditType.category: Repositories auditType.action: Secret scanning exempt repository added condition: selection falsepositives: - Legitimate user activity. level: high
Near-miss passage: Sigma rule: Detects remote RPC calls to create or execute a scheduled task via ATSvc. Logsource: rpc_firewall / application. Rule: title: Remote Schedule Task Lateral Movement via ATSvc id: 0fcd1c79-4eeb-4746-aba9-1b458f7a79cb status: test description: Detects remote RPC calls to create or execute a scheduled task via ATSvc references: - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/d1058a28-7e02-4948-8b8d-4a347fa64931 - https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-TSCH.md - https://github.com/zeronetworks/rpcfirewall - https://zeronetworks.com/blog/stopping-lateral-movement-via-the-rpc-firewall/ author: Sagie Dulce, Dekel Paz date: 2022-01-01 tags: - attack.privilege-escalation - attack.lateral-movement - attack.execution - attack.persistence - attack.t1053 - attack.t1053.002 logsource: product: rpc_firewall category: application definition: 'Requirements: install and apply the RPC Firewall to all processes with "audit:true action:block uuid:1ff70682-0a51-30e8-076d-740be8cee98b"' detection: selection: EventLog: RPCFW EventID: 3 InterfaceUuid: 1ff70682-0a51-30e8-076d-740be8cee98b OpNum: - 0 - 1 condition: selection falsepositives: - Unknown level: high
Query: playbook for alert: EDR alert: possible Email Bombing (T1667)
Matching passage: Playbook for T1667 Email Bombing. 1) Validate alert telemetry against T1667. 2) Scope affected hosts and accounts. 3) Contain by isolating endpoint / disabling account if confirmed. 4) Hunt for related tactics: impact. 5) Eradicate persistence and recover. Reference detection notes: Adversaries may flood targeted email addresses with an overwhelming volume of messages. This may bury legitimate emails in a flood of spam and disrupt business operations.(Citation: sophos-bombing)(Citation: krebs-email-bombing) An adversary may accomplish email bombing by leveraging an automated bot to register a targeted address for e-mail lists that do not validate new signups, such as online n
Near-miss passage: Playbook for T1485.001 Lifecycle-Triggered Deletion. Different response path focused on impact.
Query: CVE similar to CVE-2015-7625
Matching passage: CVE-2015-7625. CWE: CWE-119. CVSS: 10.0. Adobe Flash Player before 18.0.0.252 and 19.x before 19.0.0.207 on Windows and OS X and before 11.2.202.535 on Linux, Adobe AIR before 19.0.0.213, Adobe AIR SDK before 19.0.0.213, and Adobe AIR SDK & Compiler before 19.0.0.213 allow attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors, a different vulnerability than CVE-2015-7626, CVE-2015-7627, CVE-2015-7630, CVE-2015-7633, and CVE-2015-7634.
Near-miss passage: CVE-2015-8407. CWE: CWE-119. CVSS: 10.0. Stack-based buffer overflow in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on Linux, Adobe AIR before 20.0.0.204, Adobe AIR SDK before 20.0.0.204, and Adobe AIR SDK & Compiler before 20.0.0.204 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-8457.
Query: risk of Unspecified vulnerability in Oracle MySQL Server 5.5.43 and earlier and 5.6.24 and earlier allows remote authenticated users to affect availability via unknown vectors related to S
Matching passage: CVE-2015-2643. CWE: UNKNOWN. CVSS: 4.0. Unspecified vulnerability in Oracle MySQL Server 5.5.43 and earlier and 5.6.24 and earlier allows remote authenticated users to affect availability via unknown vectors related to Server : Optimizer.
Near-miss passage: CVE-2015-2903. CWE: UNKNOWN. CVSS: 6.900000095367432. The CWSAPI SOAP service in HP ArcSight SmartConnectors before 7.1.6 has a hardcoded password, which makes it easier for remote attackers to obtain administrative access by leveraging knowledge of this password.
Query: detect Botnet
Matching passage: T1584.005 Botnet. Tactics: resource development. Description: Adversaries may compromise numerous third-party systems to form a botnet that can be used during targeting. A botnet is a network of compromised systems that can be instructed to perform coordinated tasks.(Citation: Norton Botnet) Instead of purchasing/renting a botnet from a booter/stresser service, adversaries may build their own botnet by compromising numerous third-party systems.(Citation: Imperva DDoS for Hire) Adversaries may also conduct a takeover of an existing botnet, such as redirecting bots to adversary-controlled C2 servers.(Citation: Dell Dridex Oct 2015) With a botnet at their disposal, adversaries may perform follow-on activity such as large-scale [Phishing](https://attack.mitre.org/techniques/T1566) or Distributed Denial of Service (DDoS).
Near-miss passage: T1584.003 Virtual Private Server. Tactics: resource development. Description: Adversaries may compromise third-party Virtual Private Servers (VPSs) that can be used during targeting. There exist a variety of cloud service providers that will sell virtual machines/containers as a service. Adversaries may compromise VPSs purchased by third-party entities. By compromising a VPS to use as infrastructure, adversaries can make it difficult to physically tie back operations to themselves.(Citation: NSA NCSC Turla OilRig) Compromising a VPS for use in later stages of the adversary lifecycle, such as Command and Control, can allow adversaries to benefit from the ubiquity and trust associated with higher reputation cloud service providers as well as that added by the compromised third-party.
Query: explain CWE-578
Matching passage: CWE-578 EJB Bad Practices: Use of Class Loader. The product violates the Enterprise JavaBeans (EJB) specification by using the class loader.
Near-miss passage: CWE-1038 Insecure Automated Optimizations. The product uses a mechanism that automatically optimizes code, e.g. to improve a characteristic such as performance, but the optimizations can have an unintended side effect that might violate an intended security assumption.
Query: vulnerability: Adobe Flash Player before 18.0.0.232 on Windows and OS X and before 11.2.202.508 on Linux, Adobe AIR before 18.0.0.199, Adobe AIR SDK before 18.0.0.199, and Adobe AIR SDK & Compile
Matching passage: CVE-2015-5548. CWE: CWE-119. CVSS: 10.0. Adobe Flash Player before 18.0.0.232 on Windows and OS X and before 11.2.202.508 on Linux, Adobe AIR before 18.0.0.199, Adobe AIR SDK before 18.0.0.199, and Adobe AIR SDK & Compiler before 18.0.0.199 allow attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors, a different vulnerability than CVE-2015-5544, CVE-2015-5545, CVE-2015-5546, CVE-2015-5547, CVE-2015-5549, CVE-2015-5552, and CVE-2015-5553.
Near-miss passage: CVE-2015-5290. CWE: CWE-119. CVSS: 7.5. A Denial of Service vulnerability exists in ircd-ratbox 3.0.9 in the MONITOR Command Handler.