SigmaHQ Detections
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6,797 detections
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Detects the execution of the "cloudflared" tool with the "tunnel cleanup" command. This command is used to remove Cloudflare Tunnel connections, which could be an indicator of an adversary attempting to remove traces of their C2 infrastructure or clean up after an operation. The rule looks for specific command-line arguments including 'tunnel', 'cleanup', and either '-config' or '-connector-id'.
This rule detects the execution of 'tar.exe' with command-line arguments indicative of creating a compressed archive. Specifically, it looks for the '-c' (create), '-r' (append or update), or '-u' (update) flags. This activity is often associated with adversaries compressing data before exfiltration.
Detects the execution of "forfiles" from a non-default location, in order to potentially spawn a custom "cmd.exe" from the current working directory. This technique can be used for defense evasion by masquerading the execution of arbitrary commands.
Detects the use of rar.exe to create an archive with a password and recursive flag, specifically targeting system folders or common staging directories. This behavior is often associated with attackers collecting and preparing data for exfiltration.
This rule detects attempts to tamper with Windows Defender settings using PowerShell's Set-MpPreference cmdlet. Specifically, it looks for commands that disable various Defender features like real-time monitoring, behavior monitoring, archive scanning, or set default threat actions to 'Allow'. This activity is indicative of an adversary trying to impair defensive capabilities on a system.
This rule detects the execution of 'tar.exe' with the '-x' command-line argument, indicating an attempt to extract compressed files. Adversaries often use legitimate utilities like 'tar.exe' to decompress data, which can help them avoid detection and prepare collected data for further actions like exfiltration. The rule specifically looks for the 'tar.exe' image or an original filename of 'bsdtar' combined with the extraction flag.
This rule detects potential direct system calls to NtOpenProcess, specifically when the CallTrace starts with 'UNKNOWN'. This behavior can be indicative of advanced persistent threats (APTs) or malware attempting to evade detection by bypassing user-mode API hooks. The rule includes several filters to reduce false positives from legitimate applications and system processes.
This rule detects command-line activity that attempts to access sensitive Microsoft Teams files, specifically the Cookies or Local Storage\leveldb directories. These locations can contain authentication tokens and other sensitive information. The rule specifically looks for processes other than the legitimate Teams.exe accessing these paths, indicating potential credential theft or unauthorized access.
Detects the use of the WMI command-line (WMIC) utility to identify and display various system information, including OS, CPU, GPU, and disk drive names; memory capacity; display resolution; and baseboard, BIOS, and GPU driver products/versions. Some of these commands were used by Aurora Stealer in late 2022/early 2023.
Detects PowerShell scripts attempting to disable scheduled scanning and other parts of Windows Defender ATP or set default actions to allow. This rule specifically looks for the `Set-MpPreference` cmdlet combined with various parameters that disable Defender features or set threat actions to 'Allow'.
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