Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
32 detections
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Detects the creation of shortcut (.lnk) files in the Windows Startup directory by common archive extraction utilities, indicative of the Gamaredon/UAC-0226 GIFTEDCROOK campaign using CVE-2025-8088 to perform path traversal and gain persistence.
Detects persistence mechanisms associated with the UAC-0226 threat actor by identifying a LNK shortcut file located in the user Startup folder that executes a minimized cmd.exe process. This command shell subsequently launches a hidden PowerShell command that reads and executes code from C:\ProgramData\WC3 using Invoke-Expression (IEX). This activity is linked to the GIFTEDCROOK delivery chain.
Detects exploitation activity associated with CVE-2025-8088 used by UAC-0226 (GIFTEDCROOK). The rule monitors for WinRAR-family archive tools dropping files into the startup folder, staging payloads into C:\ProgramData, and the subsequent logon execution chain where cmd.exe launches PowerShell to execute encoded commands or content from ProgramData.
Detects WinRAR.exe writing files to sensitive directories such as the Startup folder or C:\ProgramData, potentially indicative of exploitation of path traversal vulnerabilities (CVE-2025-8088, CVE-2025-6218). This activity is associated with UAC-0226's use of WinRAR to establish persistence or stage malicious payloads.
Detects WinRAR application writing a shortcut (.lnk) file directly into the Windows Startup folder. This activity is indicative of exploitation of NTFS Alternate Data Stream (ADS) path traversal vulnerabilities (such as CVE-2025-8088 or CVE-2025-6218) to achieve persistence by placing a malicious shortcut in the user's startup directory without triggering typical user interaction warnings.
Detects instances where WinRAR.exe is observed writing potentially malicious script or link files (.hta, .vbs, .js, .ps1, .lnk) into the Windows Startup folder. This pattern is indicative of exploitation of CVE-2025-8088, a path traversal vulnerability in WinRAR often leveraged by the Gamaredon group to establish persistence.
Detects the WinRAR.exe process creating a .lnk shortcut file within the user's Startup directory. This behavior is indicative of an exploitation attempt (e.g., UAC-0226 related NTFS path traversal vulnerabilities) where an attacker plants a persistence mechanism via a malicious archive extraction.
Detects the creation of files named 'WC3' or 'wt1' within the 'C:\ProgramData' directory. These filenames are associated with the UAC-0226 threat actor's delivery chain, specifically involving an encoded PowerShell loader (WC3) and an arithmetic-encoded GIFTEDCROOK payload (wt1). These files are typically dropped via path traversal exploitation (CVE-2025-8088) using WinRAR NTFS alternate data streams.
Detects the exploitation of the CVE-2025-8088 vulnerability in WinRAR, where a path traversal technique is used to extract malicious files directly into the Windows Startup folder. This pattern is associated with threat actors like Gamaredon to achieve persistence, typically by placing HTA downloaders that execute upon user logon.
Detects WinRAR creating .lnk files within Windows Startup directories under suspicious conditions. The rule looks for indicators of NTFS Alternate Data Stream (ADS) path traversal, where WinRAR might be instructed to write a file into a sensitive directory using a path like 'archive.rar:stream\malicious.lnk'. This behavior is indicative of exploitation attempts related to vulnerabilities like CVE-2025-6218 or CVE-2025-8088.
Detects WinRAR creating a malicious VBS/VBE script within the Windows Startup folder using NTFS Alternate Data Streams, a behavior associated with the exploitation of CVE-2025-8088 by the Gamaredon threat group.
Detects suspicious child processes (such as PowerShell, CMD, or WScript) being spawned by Microsoft Office applications or email clients, which is indicative of exploitation activity consistent with Gamaredon spear-phishing campaigns. This specifically monitors for execution patterns attempting to deploy 'Ptero' family implants potentially following exploitation of vulnerabilities such as CVE-2025-8088.
Detects a multi-stage attack chain beginning with the execution of suspicious processes (mstsc.exe, mshta.exe) from email clients or download directories, followed by WinRAR or unrar.exe writing files containing path traversal sequences, and concluding with the execution of a child process from a suspicious directory. This behavior aligns with exploitation attempts targeting vulnerabilities like CVE-2025-8088.
Detects the creation of potentially malicious executable or script files (.exe, .lnk, .vbs, .ps1, .hta) or autorun.inf files on removable drives (D-Z) initiated by common script interpreters or suspicious processes. This activity is then correlated with prior detections of Gamaredon (ACTINIUM/Primitive Bear) implant activity, such as Ptero-family malware, specific obfuscated PowerShell patterns, or HTML smuggling delivery via mail/Office clients on the same host within a 24-hour window.
Detects instances where WinRAR.exe is observed writing potentially malicious script or link files (.hta, .vbs, .js, .ps1, .lnk) into the Windows Startup folder. This pattern is indicative of exploitation of CVE-2025-8088, a path traversal vulnerability in WinRAR often leveraged by the Gamaredon group to establish persistence.
This rule detects potential exploitation of CVE-2025-8088 involving WinRAR or unrar processing malicious archives with path traversal characters (../ or ..\). It identifies the extraction of script files (HTA, VBS, PS1, BAT) into the Windows Startup folder, followed by the execution of these files via mshta.exe or wscript.exe within a 30-second window, characteristic of Gamaredon group persistence mechanisms.
Detects persistence via registry modification commonly associated with RomCom adversary activity (e.g., Mythic, SnipBot, MeltingClaw) post-CVE-2025-8088 exploitation.
Detects path traversal exploitation of WinRAR (CVE-2025-8088) where a malicious RAR archive extraction results in the creation of suspicious STOCKSTAY payload files (e.g., MicrosoftUpdateOneDrive.exe) outside of the expected or secure extraction directories, linked to Turla activity.
Detects the execution of msiexec.exe spawned by WinRAR or unrar processes, specifically targeting the installation of STOCKSTAY payloads. This activity is indicative of exploitation of the WinRAR path traversal vulnerability (CVE-2025-8088), where attackers extract malicious MSI files to unauthorized locations to bypass security controls and achieve code execution.
Detects exploitation of CVE-2025-8088, where WinRAR writes a nested .vbs payload directly to the Startup folder via NTFS ADS path traversal.
Detects persistence via registry modification commonly associated with RomCom adversary activity (e.g., Mythic, SnipBot, MeltingClaw) post-CVE-2025-8088 exploitation.
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