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

Status: test
Severity: medium
Log source: category ps_module, product windows
Author: Nasreddine Bencherchali (Nextron Systems), frack113
Source: github.com/SigmaHQ/sigma

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.

MITRE ATT&CK coverage

Tactic	Techniques
Collection	`T1074.001` Data Staged: Local Data Staging

Telemetry coverage

Provider	Record / event type
PowerShell	Event ID 4103: Payload Context: ContextInfo User Data: UserData.

Rule body

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

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

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

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`ContextInfo`	match	`Compress-Archive -Path-DestinationPath $env:TEMP` `Compress-Archive -Path-DestinationPath:\Windows\Temp\` `Compress-Archive -Path-DestinationPath*\AppData\Local\Temp\`	`field:"ContextInfo" kind:match`