SigmaHQ Detections
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6,800 detections
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Detects modifications to the 'ms-msdt' URI scheme in the Windows Registry, specifically when the 'TargetObject' starts with 'HKCR\ms-msdt\'. This activity could indicate an attempt to exploit CVE-2022-30190, a Microsoft Support Diagnostic Tool (MSDT) vulnerability, often referred to as "Follina". The vulnerability allows for remote code execution via specially crafted Microsoft Office documents.
Detects exploitation attempts of the OWASSRF vulnerability targeting Microsoft Exchange servers using publicly available Proof-of-Concept (POC) code. This exploit leverages the Outlook Web Access (OWA) endpoint to gain access to the PowerShell backend endpoint, indicated by specific URI patterns, HTTP method, user-agent, and a successful HTTP status code.
Detects exploitation attempts of CVE-2023-4966, a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability. The detection logic specifically looks for GET requests to '/oauth/idp/.well-known/openid-configuration' with an unusually long host header string (150 characters or more) in proxy logs. This pattern is indicative of the 'Citrix Bleed' exploit.
Detects file modifications to the temporary XML user database file in the ScreenConnect server. This activity can indicate local user modification, potentially as part of the exploitation of the ScreenConnect Authentication Bypass vulnerability (CVE-2024-1709) in versions <23.9.8. It may also be observed during legitimate modifications to local users or permissions within ScreenConnect.
Detects command line patterns used by BlackByte ransomware in different operations, including execution from the Public user directory, attempts to delete Task Manager, disable services, and use obfuscated PowerShell commands.
This rule detects the creation, modification, or deletion of scheduled tasks using specific task names known to be associated with the SVR-attributed GraphicalProton backdoor. The task names are designed to mimic legitimate Windows services to evade detection.
Detects GET requests to '/SetupWizard.aspx/[anythinghere]' that indicate exploitation of the ScreenConnect vulnerability CVE-2024-1709, which is an authentication bypass vulnerability.
Detects the execution of the Qakbot uninstaller file, identified by its filename or specific file hashes, as mentioned in the USAO-CDCA document regarding the disruption of the Qakbot malware and botnet. This rule helps identify systems where the Qakbot uninstaller has been run, which could indicate remediation efforts or system compromise.
This rule detects file modifications to ASPX and ASHX files within the root of the App_Extensions directory, which is indicative of exploitation of CVE-2024-1708, a path traversal vulnerability (ZipSlip) in ConnectWise ScreenConnect versions prior to 23.9.8. The detection relies on Windows Event ID 4663 (File System) with a SACL set on the directory to log successful access attempts.
Detects the execution of specific processes and command line combinations associated with the Forest Blizzard APT group. This includes the creation and deletion of scheduled tasks using 'schtasks.exe' and PowerShell commands for file operations, as described by Microsoft.
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