Sigma detection rules, expert-reviewed

PowerShell Write-Hijack HackTool Creates .bat for DLL Hijack Execution (Windows)

Flags PowerShell creating .bat files consistent with PowerUp Write-Hijack DLL abuse on Windows.

Windows: Detect reg.exe Changing Screen Saver Registry Settings for .scr Payloads

Flags reg.exe command lines that modify HKCU desktop screensaver settings and configure a .scr screen saver payload.

PowerShell WMI Event Subscription Persistence via New-CimInstance

Finds PowerShell creating WMI __EventFilter and CommandLineEventConsumer objects for event-triggered persistence.

Windows PowerShell: Add-Content to $profile for Potential Persistence

Detects PowerShell Add-Content writing to $profile, especially when paired with common command-loading or execution payloads.

Windows Procdump Process Execution

Alerts on execution of Sysinternals Procdump (32/64 variants) based on process creation image path.

Windows whoami.exe Execution from Suspicious Parent Processes

Alerts on whoami.exe runs where the parent process is not a typical shell or monitoring agent.

Windows whoami.exe Renamed Execution via Mismatched OriginalFileName

Alerts when a renamed process still reports OriginalFileName as whoami.exe on Windows.

Windows Maldoc Process Injection via winword.exe CallTrace from LittleCorporal

Flags winword.exe process injection where the call trace matches LittleCorporal-generated Maldoc activity on Windows.

PowerShell ShellIntel Commandlet Abuse via ScriptBlock Logging

Flags PowerShell script blocks that reference known ShellIntel commandlets tied to exploitation activity.

Microsoft Exchange: Mailbox export to UNC path or .aspx filename with possible role assignment

Flags Exchange mailbox export commands targeting UNC paths with .aspx or granting the Mailbox Import Export role.

Windows Exchange Management: Set-OabVirtualDirectory after ProxyLogon exploitation

Flags Exchange management command lines invoking Set-OabVirtualDirectory with suspicious external URL/script injection patterns.

Windows AnyDesk Silent Installation via Command-Line Flags

Identifies AnyDesk being silently installed on Windows using --install, --start-with-win, and --silent command-line flags.

Windows esentutl Usage with /p Flag for Credential Access

Flags Windows executions of esentutl when used with the /p parameter to access credentials-related files.

Windows Registry: Tamper Protection Disabled in Microsoft Defender Features

Flags registry changes that set Microsoft Defender Tamper Protection to disabled (DWORD 0x0), excluding expected MsMpEng update activity.

Windows Registry: Disabling Windows Defender PUA Protection via PUAProtection DWORD

Flags registry changes that set Windows Defender PUAProtection DWORD to 0x00000000 to disable PUA protection.