Sigma rule: Run PowerShell Script from Redirected Input Stream

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-9fbeee6528f9, updated 2021-11-27T00:00:00.000Z.

Rule

Title
Run PowerShell Script from Redirected Input Stream
Status
test
Level
high
Author
Moriarty Meng (idea), Anton Kutepov (rule), oscd.community
Date
2020-10-17
Modified
2021-11-27
File
rules/windows/process_creation/proc_creation_win_powershell_run_script_from_input_stream.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects PowerShell script execution via input stream redirect

Log source

product
windows
category
process_creation

Detection

selection:
    Image|endswith:
        - '\powershell.exe'
        - '\pwsh.exe'
    CommandLine|re: '\s-\s*<'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.t1059

MITRE ATT&CK ids this rule names

References

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_powershell_run_script_from_input_stream.yml

Sources and licences

  • SigmaHQ

    "Run PowerShell Script from Redirected Input Stream" by Moriarty Meng (idea), Anton Kutepov (rule), oscd.community (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_powershell_run_script_from_input_stream.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Run PowerShell Script from Redirected Input Stream",
entity page, dataset version ref-9fbeee6528f9, updated 2021-11-27T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/c83bf4b5-cdf0-437c-90fa-43d734f7c476 (accessed 2026-11-03).
Underlying source: SigmaHQ rule c83bf4b5-cdf0-437c-90fa-43d734f7c476, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.