Zip A Folder With PowerShell For Staging In Temp - PowerShell Module

Detects PowerShell scripts that make use of the "Compress-Archive" Cmdlet in order to compress folders and files where the output is stored in a potentially suspicious location that is used often by malware for exfiltration. An adversary might compress data (e.g., sensitive documents) that is collected prior to exfiltration in order to make it portable and minimize the amount of data sent over the network.

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Detection logic

selection

ContextInfo|contains|all:
  - Compress-Archive -Path*-DestinationPath $env:TEMP
  - Compress-Archive -Path*-DestinationPath*\AppData\Local\Temp\
  - Compress-Archive -Path*-DestinationPath*:\Windows\Temp\

Condition

selection

Raw YAML

title: Zip A Folder With PowerShell For Staging In Temp  - PowerShell Module
id: daf7eb81-35fd-410d-9d7a-657837e602bb # PowerShell Module
related:
    - id: 71ff406e-b633-4989-96ec-bc49d825a412 # PowerShell Classic
      type: similar
    - id: b7a3c9a3-09ea-4934-8864-6a32cacd98d9 # PowerShell Script
      type: similar
    - id: 85a8e5ba-bd03-4bfb-bbfa-a4409a8f8b98 # Process Creation
      type: similar
status: test
description: |
    Detects PowerShell scripts that make use of the "Compress-Archive" Cmdlet in order to compress folders and files where the output is stored in a potentially suspicious location that is used often by malware for exfiltration.
    An adversary might compress data (e.g., sensitive documents) that is collected prior to exfiltration in order to make it portable and minimize the amount of data sent over the network.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1074.001/T1074.001.md
    - https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-347a
author: Nasreddine Bencherchali (Nextron Systems), frack113
date: 2021-07-20
modified: 2023-12-18
tags:
    - attack.collection
    - attack.t1074.001
logsource:
    product: windows
    category: ps_module
    definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b
detection:
    selection:
        ContextInfo|contains|all:
            - 'Compress-Archive -Path*-DestinationPath $env:TEMP'
            - 'Compress-Archive -Path*-DestinationPath*\AppData\Local\Temp\'
            - 'Compress-Archive -Path*-DestinationPath*:\Windows\Temp\'
    condition: selection
falsepositives:
    - Unknown
level: medium