Sigma rule: Potential POWERTRASH Script Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-1736b17608f9, updated 2023-05-04T00:00:00.000Z.

Rule

Title
Potential POWERTRASH Script Execution
Status
test
Level
high
Author
Nasreddine Bencherchali (Nextron Systems)
Date
2023-05-04
File
rules-emerging-threats/2023/TA/FIN7/posh_ps_apt_fin7_powertrash_execution.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects potential execution of the PowerShell script POWERTRASH

Log source

product
windows
category
ps_script
definition
bade5735-5ab0-4aa7-a642-a11be0e40872

Detection

selection:
    ScriptBlockText|contains|all:
        - 'IO.Compression.DeflateStream'
        - 'IO.MemoryStream'
        - '::FromBase64String'
        - 'GetDelegateForFunctionPointer'
        - '.Invoke()'
        - 'GlobalAssemblyCache'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.t1059.001
  • attack.g0046
  • detection.emerging-threats

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-emerging-threats/2023/TA/FIN7/posh_ps_apt_fin7_powertrash_execution.yml

Sources and licences

  • SigmaHQ

    "Potential POWERTRASH Script Execution" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2023/TA/FIN7/posh_ps_apt_fin7_powertrash_execution.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: Potential POWERTRASH Script Execution",
entity page, dataset version ref-1736b17608f9, updated 2023-05-04T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/4e19528a-f081-40dd-be09-90c39352bd64 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 4e19528a-f081-40dd-be09-90c39352bd64, 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.