Ibrahim Saud
@tektrixIndiaCompletionist
2 followers18,458 downloads7,065 copies47 likes38,441 views
11,679 detections
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Detects anomalous Kerberos TGS ticket requests (Event ID 4769) using weak encryption (RC4/0x17) directed at multiple unique Service Principal Names (SPNs) from a single host or user within a short timeframe. This behavior is indicative of Kerberoasting, a technique used by attackers to harvest service account credentials for offline brute-force cracking.
Detects SAML token authentication events where the token-signing certificate does not match the established federation baseline (indicating potential token forging or unauthorized IdP activity) or where critical conditional access claims (MFA and device compliance) are missing from the SAML assertion.
Detects the creation or writing of disk image files (.iso, .img, .vhd, .vhdx) followed by the execution of suspicious file types (.lnk, .exe, .js, .vbs, .cmd, .bat, .scr) by explorer.exe within a 10-minute window. This behavior is indicative of an adversary using container files to bypass security controls or execute malicious payloads from mounted images.
Detects anomalous mass file modification or renaming activity often associated with ransomware, combined with the deletion of Windows Volume Shadow Copies using native utilities like vssadmin or wmic, and the presence of suspicious ransom note filenames.
Detects the two-stage execution chain associated with Raspberry Robin (Gamarue) propagation via removable media. The rule correlates the initiation of suspicious processes (msiexec.exe, rundll32.exe, or explorer.exe) from removable drive paths containing disguised DLLs or LNK files with subsequent obfuscated rundll32.exe execution command lines within a 30-minute window.
Detects ClickFix-style activity where a user is tricked into entering or pasting malicious command strings into the Windows File Explorer address bar. This activity results in the spawning of common utilities like cmd.exe, powershell.exe, or certutil.exe with arguments associated with UNC paths, Base64 encoding, or download cradles (e.g., IEX, bitsadmin, or URLCache operations).
Detects execution of potentially malicious processes (mshta, powershell, cmd, conhost) which are common vectors for ClickFix-style attacks, where a user is socially engineered into copying and pasting malicious commands into the Windows Run dialog or a command prompt.
Detects ClickFix-style activity where a user is tricked into entering or pasting malicious command strings into the Windows File Explorer address bar. This activity results in the spawning of common utilities like cmd.exe, powershell.exe, or certutil.exe with arguments associated with UNC paths, Base64 encoding, or download cradles (e.g., IEX, bitsadmin, or URLCache operations).
Detects ClickFix-style activity where a user is tricked into entering or pasting malicious command strings into the Windows File Explorer address bar. This activity results in the spawning of common utilities like cmd.exe, powershell.exe, or certutil.exe with arguments associated with UNC paths, Base64 encoding, or download cradles (e.g., IEX, bitsadmin, or URLCache operations).
Detects potential execution of malicious commands following a fake browser crash dialog, often used in social engineering attacks (CrashFix). The rule identifies PowerShell or Windows Script Host processes spawned by common web browsers shortly after a browser session start, specifically looking for common command-line indicators used to copy-paste or execute malicious snippets, while filtering out legitimate WerFault.exe crash reporting activity.
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