SigmaHQ Detections
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6,797 detections
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Detects actions that disable Address Space Layout Randomization (ASLR) in Linux. This includes using the `personality` syscall with the ADDR_NO_RANDOMIZE flag, modifying the `/proc/sys/kernel/randomize_va_space` file, or executing the `sysctl` command to set `kernel.randomize_va_space=0`. Disabling ASLR can be used by attackers to bypass memory protection mechanisms and make memory corruption attacks more reliable, often during exploit development.
Detects modification of autostart extensibility point (ASEP) in registry.
Detects token obfuscation techniques commonly used by Invoke-Obfuscation within PowerShell scripts. This rule is designed to identify highly obfuscated PowerShell code that attempts to evade detection by manipulating string formatting, environment variables, and character escaping. It can be used as a threat-hunting baseline to find suspicious scripts in an environment.
Detects the modification of NTFS symbolic link behavior using fsutil, which could be used to enable remote to local or remote to remote symlinks for potential attacks.
Detects registry modifications that add Windows Filtering Platform (WFP) filters, which may be used to block security tools and EDR agents from reporting events. This rule specifically looks for modifications to the 'Filter' subkey within the WFP policy parameters in the registry, while excluding modifications made by svchost.exe to reduce false positives.
Detects specific command-line patterns used by the Turla APT group, as detailed in an ESET report from May 2020. The rule looks for `tracert` commands targeting `yahoo.com`, PowerShell obfuscated commands involving `FromBase64String`, and `net use` commands attempting to connect to `docs.live.net` with an `@aol.co.uk` credential.
Detects potential Dtrack RAT activity by identifying specific command-line patterns associated with network discovery and system information gathering. The rule looks for the execution of 'ping' with specific arguments, 'ipconfig /all' redirecting output to a temporary file, and 'netsh interface ip show config' also redirecting output to a temporary file. These commands are commonly used by Dtrack for reconnaissance.
This rule detects specific command-line patterns associated with Snatch ransomware activity. Specifically, it looks for commands that immediately reboot the system into safe mode ('shutdown /r /f /t 00') and commands that stop the 'SuperBackupMan' service ('net stop SuperBackupMan'). These actions are characteristic of Snatch ransomware's evasion and impact tactics, where it reboots into safe mode to bypass security software and stops backup-related services to facilitate encryption.
Detects suspicious process execution patterns originating from AsperaFaspex, specifically targeting activities observed in campaigns attributed to Mint Sandstorm. The rule looks for PowerShell execution with suspicious command-line arguments (e.g., for credential dumping, defense evasion, or discovery), execution of tools like wget or curl for downloading content, attempts to modify local administrator groups, registry modifications for defense evasion, and WMI/vssadmin/wbadmin commands for persistence or defense evasion. This behavior indicates potential post-exploitation activity.
Detects the execution of 'auditctl' with the '-D' command line parameter, which deletes all configured audit rules and watches on Linux systems. This technique is commonly used by attackers to disable audit logging and cover their tracks by removing monitoring capabilities. Removal of audit rules can significantly impair detection of malicious activities on the affected system.
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