Sigma rule: Suspicious Processes Spawned by WinRM

Rule

Title

Suspicious Processes Spawned by WinRM

Status

test

Level

high

Author

Andreas Hunkeler (@Karneades), Markus Neis

Date

2021-05-20

Modified

2022-07-14

File

rules/windows/process_creation/proc_creation_win_winrm_susp_child_process.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects suspicious processes including shells spawnd from WinRM host process

Log source

product

windows

category

process_creation

Detection

selection:
    ParentImage|endswith: '\wsmprovhost.exe'
    Image|endswith:
        - '\cmd.exe'
        - '\sh.exe'
        - '\bash.exe'
        - '\powershell.exe'
        - '\pwsh.exe'
        - '\wsl.exe'
        - '\schtasks.exe'
        - '\certutil.exe'
        - '\whoami.exe'
        - '\bitsadmin.exe'
condition: selection

False positives (as the rule lists them)

• Legitimate WinRM usage

Tags

• attack.t1190
• attack.initial-access
• attack.persistence
• attack.privilege-escalation

MITRE ATT&CK ids this rule names

• T1190

References

• Internal Research

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_winrm_susp_child_process.yml