Potential POWERTRASH Script Execution

Description

Detects potential execution of the PowerShell script POWERTRASH

Query · sigma

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

Known false positives

  • Unknown
Raw source Potential POWERTRASH Script Execution · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Potential POWERTRASH Script Execution
id: 4e19528a-f081-40dd-be09-90c39352bd64
status: test
description: Detects potential execution of the PowerShell script POWERTRASH
references:
    - https://labs.withsecure.com/publications/fin7-target-veeam-servers
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-04
tags:
    - attack.execution
    - attack.t1059.001
    - attack.g0046
    - detection.emerging-threats
logsource:
    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
falsepositives:
    - Unknown
level: high

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