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

calendar Dec 18, 2023 · attack.collection attack.t1074.001  ·
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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.

Sigma rule (View on GitHub)

 1title: Zip A Folder With PowerShell For Staging In Temp - PowerShell Script
 2id: b7a3c9a3-09ea-4934-8864-6a32cacd98d9 # PowerShell Script
 3related:
 4    - id: 71ff406e-b633-4989-96ec-bc49d825a412 # PowerShell Classic
 5      type: similar
 6    - id: daf7eb81-35fd-410d-9d7a-657837e602bb # PowerShell Module
 7      type: similar
 8    - id: 85a8e5ba-bd03-4bfb-bbfa-a4409a8f8b98 # Process Creation
 9      type: similar
10status: test
11description: |
12    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.
13    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.    
14references:
15    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1074.001/T1074.001.md
16    - https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-347a
17author: Nasreddine Bencherchali (Nextron Systems), frack113
18date: 2021/07/20
19modified: 2023/12/18
20tags:
21    - attack.collection
22    - attack.t1074.001
23logsource:
24    product: windows
25    category: ps_script
26    definition: 'Requirements: Script Block Logging must be enabled'
27detection:
28    selection:
29        ScriptBlockText|contains:
30            - 'Compress-Archive -Path*-DestinationPath $env:TEMP'
31            - 'Compress-Archive -Path*-DestinationPath*\AppData\Local\Temp\'
32            - 'Compress-Archive -Path*-DestinationPath*:\Windows\Temp\'
33    condition: selection
34falsepositives:
35    - Unknown
36level: medium

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