Sigma detection rules, expert-reviewed

Windows Process Tree for Axios npm Supply-Chain RAT Droppers (cscript, curl, PowerShell)

Alerts on the Windows process/command-line pattern consistent with the Axios npm compromise execution and C2 fetch.

Windows File Creation Indicators Linked to Malicious Axios npm Supply-Chain Components

Flags Windows file creation of wt.exe/system.bat and temp .vbs/.ps1 payloads when created by node.exe or powershell.exe.

Windows System Restore Registry Modification via PowerShell or reg.exe Command Line

Flags PowerShell/reg.exe command lines modifying Windows System Restore registry keys to disable or restrict recovery.

Detect Email Forwarding/Redirecting via Exchange PowerShell InboxRule Cmdlets on Windows

Alerts when PowerShell script blocks reference Exchange inbox/rule cmdlets and forwarding/redirect parameters.

OpenEDR ssh-shellhost Spawning Cmd or PowerShell With PTY on Windows

Alerts when OpenEDR ssh-shellhost.exe starts cmd.exe or PowerShell with --pty from under ITSMService.exe.

Windows PowerShell: New-InboxRule/Set-InboxRule Script Block Activity

Detects PowerShell script content using Exchange cmdlets to create or update inbox rules with message-manipulation actions.

Windows Vulnerable Driver Blocklist Registry Tampering via PowerShell or REG.EXE

Flags PowerShell/REG.EXE command lines that change the VulnerableDriverBlocklistEnable registry setting under \Control\CI\Config.

Windows HVCI Registry Tampering via reg.exe or PowerShell Command Line

Alerts on PowerShell/pwsh or reg.exe command lines modifying HVCI/Hypervisor-enforced code integrity registry values.

Windows Registry: User Shell Folders Value Modification via reg.exe or PowerShell

Alerts when reg.exe or PowerShell modifies User Shell Folders/Shell Folders Startup-related registry values.

Windows Credential Guard Registry Key Tampering via reg.exe or PowerShell Command Line

Alerts on PowerShell/Reg.exe commands that add/modify/delete DeviceGuard/LSA registry values tied to Credential Guard.

Windows Process Creation: Registry Modification to Disable ETW AutoLogger via reg.exe or PowerShell

Flags reg.exe or PowerShell registry changes aimed at disabling WMI AutoLogger EventLog session components.

Windows Process Command-Line Tampering of AMSI Registry Values via reg.exe or PowerShell

Alerts on reg.exe or PowerShell command lines attempting to add/set AMSI enable registry settings.

Windows: Suspicious Script/Command Child Processes Spawned by ArcSOC.exe

Alerts when ArcSOC.exe launches cmd/cscript/mshta/powershell/wscript and similar interpreters, indicating potential remote code execution.

Windows ClickFix/FileFix Clipboard Phishing Leading to Suspicious mshta/powershell Command Execution

Alerts on explorer.exe child process launches with clipboard markers and anti-bot/CAPTCHA-related wording indicating ClickFix/FileFix execution.

Windows: Suspicious Kerberos Ticket Requests from PowerShell Using KerberosRequestorSecurityToken

Flags PowerShell command lines that reference KerberosRequestorSecurityToken and .GetRequest() for suspicious Kerberos ticket requests.