Sigma detection rules, expert-reviewed

Azure Activity Logs: Granting Role Assignments from New Source IPs

Alerts on Azure role assignment permission grants when they originate from a new source IP in Activity Logs.

Azure Activity Logs: High Rate of VM Creations or Deployment Writes

Flags Azure activity log events showing VM creation or deployment write operations occurring at an anomalously high volume.

Windows Security Log: Metasploit SMB NTLM Logon (4624/4625, 4776)

Detects Metasploit-linked NTLM SMB authentication activity using Windows 4624/4625 and 4776 with 16-char workstation names.

Windows Failed Logon (Event ID 4625) From Non-Private Public IP

Alerts on Windows failed logons (4625) originating from IPs outside private/local ranges.

Windows Fax Service ualapi.dll Side-Loading via fxssvc.exe

Flags fxssvc.exe loading ualapi.dll from unexpected paths, indicating potential DLL side-loading for privilege escalation.

Windows AppCompatFlags Store New Application Registry Entries

Alerts on new writes to the AppCompat Compatibility Assistant store registry path, indicating first-time application behavior.

Windows Registry Deletion of Shell Open Command COM Hijacking Key Paths

Flags registry deletions of \shell\open\command paths that may indicate removal of COM hijacking execution entries.

Windows sdclt.exe Spawned with High Integrity (Possible UAC Bypass)

Alerts on sdclt.exe launching as High integrity, indicating possible elevated execution consistent with UAC bypass attempts.

Windows Process Creation: .NET ETW Logging Environment Variables Set via Command Line

Flags process command lines setting COMPlus_ETWEnabled/COMPlus_ETWFlags, potentially impairing ETW logging for .NET.

Windows sdclt.exe Child Process Creation

Alerts when sdclt.exe launches a child process, a behavior consistent with abused Windows binaries in escalation chains.

Windows rundll32 WebDAV Client Execution (davclnt.dll DavSetCookie)

Flags svchost.exe spawning rundll32.exe to run davclnt.dll,DavSetCookie, consistent with WebDAV client execution.

PowerShell Get-Clipboard Cmdlet Execution via CLI on Windows

Flags Windows command lines containing Get-Clipboard, indicating potential clipboard data collection via PowerShell.

Windows PowerShell Get-Clipboard Command Execution

Flags PowerShell activity that includes the Get-Clipboard command, which may be used to collect clipboard contents.

PowerShell Decompress via Expand-Archive

Alerts on PowerShell usage of Expand-Archive, a common decompression step attackers may use to unpack files.

Windows Startup Directory File Writes for Persistence

Alerts on file writes into the Windows Startup folder that may indicate user-level persistence.