SigmaHQ Detections
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This rule detects command-line activities indicative of the uninstallation of Raccine, a ransomware protection tool. It specifically looks for combinations of commands used to terminate Raccine processes, delete its registry entries, and remove its scheduled tasks. The detection logic covers `taskkill` commands targeting `RaccineSettings.exe`, `reg.exe delete` commands referencing "Raccine Tray", and `schtasks /DELETE` commands for "Raccine Rules Updater".
This rule detects executable files created in the Downloads folder that lack common file metadata fields such as FileVersion, Description, Product, or Company. This characteristic is often observed in executables generated by tools like py2exe, which can be used by adversaries to package Python scripts into standalone executables, potentially for malicious purposes. The rule specifically looks for the absence of these fields (indicated by a '?' in the rule logic) in conjunction with the file being located in a user's Downloads directory.
Detects the execution of a process from a directory that is typically not used for legitimate executable files. Adversaries often place their malicious executables in unusual or less-monitored folders to evade detection and blend in with normal system activity. This rule identifies process creations originating from specific suspicious paths like Perflogs, various Users subdirectories, Windows system subdirectories (addins, debug, Fonts, Help, IME, Media, repair, security, Tasks), Recycle Bin, and other less common locations.
This rule detects suspicious command-line flag combinations often used by tools like PsExec to execute commands with elevated privileges, specifically targeting 'system' or 'administrator' accounts. It looks for the presence of user-setting flags ('-u system', '--user system', '-u NT', etc.) combined with command execution flags ('-c cmd', '-c powershell', '-c whoami', etc.). This pattern is indicative of an attempt to escalate privileges or execute commands as a highly privileged user.
Detects the creation of new Windows services using either the 'sc.exe' command-line utility or the PowerShell 'New-Service' cmdlet. The rule specifically looks for suspicious binary paths associated with the newly created service, including common scripting interpreters (powershell, wscript, cscript, cmd), system binaries (svchost, dllhost, rundll32), and suspicious user-writable directories (Public, Downloads, Desktop, Startup, Temp). This activity is often indicative of persistence or privilege escalation attempts by adversaries.
Detects the execution of suspicious scripts (PowerShell, MSHTA, WScript, CScript) from common temporary directories. Adversaries often stage and execute malicious scripts from temporary folders to evade detection and blend in with legitimate system activity. The rule specifically looks for these script interpreters being launched with command lines that include paths to temporary directories, while filtering out some known legitimate activities.
Detects the execution of Sysinternals SDelete to overwrite a specific file, rather than its intended use of wiping free space or entire volumes. This activity is indicative of an adversary attempting to destroy data to prevent recovery or forensic analysis.
This rule detects the execution of "VMwareToolBoxCmd.exe" with specific command-line arguments ("script" and "set") that indicate an attempt to configure a script to run when a virtual machine changes state. This technique can be used by adversaries to establish persistence within a virtualized environment.
This rule detects the execution of 'where.exe' with command-line arguments that indicate an attempt to locate sensitive browser data files. Adversaries may use this technique to discover personal information, credentials, or internal network details stored by web browsers.
Detects the usage of winget to add new additional download sources. Adversaries may abuse this functionality to introduce malicious package repositories, potentially leading to the download and execution of unauthorized software or tools.
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