CmdID

CmdID / Rules / Windows

Potential Maze Ransomware Activity

A Sigma rule for process creation on Windows, from SigmaHQ’s emerging threats rules, by Florian Roth (Nextron Systems).

critical 3 ATT&CK techniques 1 program it names

What it looks for

its detection, as SigmaHQ writes it
detection:
  selection1:
    Image|endswith: '.tmp'
    ParentImage|endswith: '\WINWORD.exe'
  selection2:
    CommandLine|endswith: 'shadowcopy delete'
    Image|endswith: '\wmic.exe'
    ParentImage|contains: '\Temp\'
  selection3:
    CommandLine|contains: '\..\..\system32'
    CommandLine|endswith: 'shadowcopy delete'
  condition: 1 of selection*

The rule’s detection, its selections and fields in order of name. The whole rule, with its references and false positives, is on SigmaHQ, by Florian Roth (Nextron Systems), under the Detection Rule License 1.1. CmdID evaluates it on a command line alone: a test on what a command line cannot show, such as the parent process or the user, is not met.

None of the everyday examples and documented commands on CmdID’s program pages trips it. To see whether a command line does, paste it into CmdID.

Programs and files it names

their pages here
wmic.exe

ATT&CK

the techniques it is tagged with
T1047Windows Management Instrumentation
T1204.002User Execution: Malicious File
T1490Inhibit System Recovery

Other rules for T1047 Windows Management Instrumentation

UNC2452 PowerShell Pattern · Suspicious Autorun Registry Modified via WMI · HTML Help HH.EXE Suspicious Child Process · Suspicious HH.EXE Execution · HackTool - CrackMapExec Execution · HackTool - CrackMapExec Execution Patterns · Blue Mockingbird · Suspicious Microsoft Office Child Process · Script Event Consumer Spawning Process · Password Set to Never Expire via WMI · Potential Windows Defender Tampering Via Wmic.EXE · Process Creation Attempt via Wmic.EXE