Arnold Chan
@slazTrusted contributorCompletionist
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Detects the Warden.dll companion DLL shipped as part of the ShieldCrash (CVE-2026-69414) exploit chain, tightened to require an unsigned/unknown publisher or a suspicious install path alongside the generic filename
Detects presence of multiple ShieldCrash CVE-2026-69414 PoC Visual Studio project/solution build artifacts indicating exploit tooling staging
Detects presence of multiple ShieldCrash CVE-2026-69414 PoC Visual Studio project/solution build artifacts indicating exploit tooling staging
Detects rapid deletion and creation cycles of the WD_SCAN object manager link, a behavioral pattern associated with a Time-of-Check-to-Time-of-Use (TOCTOU) exploit chain targeting Windows Defender (referenced as CVE-2026-69414). The rule monitors for at least three cycle events occurring within a 5-second window, specifically involving the 'WD_SCAN' object identifier.
Detects high-frequency file creation, modification, or renaming activity involving files with the specific '.df_win' extension, likely indicative of mass encryption activity or automated ransomware behavior. The rule excludes known backup and security software processes to reduce noise.
Detects high-frequency file creation, modification, or renaming activity involving files with the specific '.df_win' extension, likely indicative of mass encryption activity or automated ransomware behavior. The rule excludes known backup and security software processes to reduce noise.
Detects DragonForce ransomware note (readme.txt) referencing known DragonForce Tor negotiation/blog onion addresses
Detects Linux processes masquerading as 'php-fpm' or 'postgres' that match known SHA-256 hashes associated with the RedTail malware family. The rule identifies processes attempting to hide their identity using techniques similar to prctl(PR_SET_NAME) to rename themselves while running malicious code.
Detects repeated attempts to delete Volume Shadow Copies using WMIC. This is a common technique used by ransomware and other malware to prevent system recovery and inhibit forensic investigations. The rule filters out known backup agents and service accounts and identifies patterns where multiple distinct deletions occur within a 5-minute window.
Detects high volumes of file renaming activities involving files with the .df_win extension. This pattern is often indicative of ransomware-like behavior where mass renaming occurs as part of an encryption process, impacting multiple directories.
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