Sigma detection rules, expert-reviewed

Windows Service Installation with Suspicious ProgramData/Root Executable Image Paths

Flags Windows service installs (Event 7045) that reference suspicious EXE paths in ProgramData or directly under C:\.

Windows Service Installation with PowerShell Download and Hidden Execution

Alerts on Windows service creation (7045) with ImagePath patterns indicating hidden/staged command execution.

Windows Registry Run Key Entries Containing PowerShell Execution Strings

Alerts when registry Run key value data contains PowerShell launch or encoded download/execution strings on Windows.

Windows Webserver Parent Process Launching Credential Dumping and Exfiltration Commands

Flags web server processes spawning child commands consistent with credential dumping, exfiltration, and privilege changes.

Windows PktMon.exe Process Execution (pktmon.exe / PktMon.exe)

Alerts on Windows executions of PktMon.exe based on process creation image name and OriginalFileName.

Windows PowerShell: Suspicious Process Discovery Using Get-Process

Alerts when PowerShell script blocks contain Get-Process, indicating local process discovery activity.

PowerShell Password Policy Discovery via Get-AdDefaultDomainPasswordPolicy (Windows)

Alerts when PowerShell calls Get-AdDefaultDomainPasswordPolicy to enumerate an AD domain’s default password policy.

Windows PowerShell Directory Enumeration via Get-ChildItem and Output Redirection

Flags PowerShell directory enumeration patterns using Get-ChildItem, error suppression, and appended output to a file.

Windows PowerShell Active Directory Group Enumeration via Get-AdGroup Cmdlet

Flags PowerShell script blocks that call Get-ADGroup with -Filter to enumerate Active Directory groups.

PowerShell: Active Directory computer enumeration via Get-AdComputer

Flags PowerShell script blocks using Get-ADComputer with enumeration-related parameters for AD computer discovery.

PowerShell Get-ADUser Enumeration Using UserAccountControl DONT_REQ_PREAUTH Flag

Flags Get-ADUser PowerShell scripts enumerating accounts by UserAccountControl DONT_REQ_PREAUTH (4194304).

Windows PowerShell: Suspicious Get-ADDBAccount access to ntds.dit via BootKey and DatabasePath

Alerts on PowerShell invocations of Get-ADDBAccount that reference BootKey and DatabasePath for ntds.dit credential access.

Windows Remote Thread Creation Targeting Uncommon System Image Processes

Alert on Windows remote thread creation events targeting a predefined list of uncommon processes by image path.

Windows schtasks.exe Create Executes File from AppData\Local

Alerts on schtasks.exe creating tasks that run payloads from C:\Users\<user>\AppData\Local.

Linux Process Creation: Shell Command Piped Into Another Shell

Flags Linux processes that start with sh/bash -c and pipe execution into a subsequent shell.