Sigma rule: Compress Data and Lock With Password for Exfiltration With 7-ZIP

Rule

Title

Compress Data and Lock With Password for Exfiltration With 7-ZIP

Status

test

Level

medium

Author

frack113

Date

2021-07-27

Modified

2026-06-05

File

rules/windows/process_creation/proc_creation_win_7zip_password_compression.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

An adversary may compress or encrypt data that is collected prior to exfiltration using 3rd party utilities

Log source

product

windows

category

process_creation

Detection

selection_img:
    - Description|contains: '7-Zip'
    - Image|endswith:
          - '\7z.exe'
          - '\7zr.exe'
          - '\7za.exe'
    - OriginalFileName:
          - '7z.exe'
          - '7za.exe'
          - '7zr.exe'
selection_password:
    CommandLine|contains: ' -p'
selection_action:
    CommandLine|contains:
        - ' a '
        - ' u '
condition: all of selection_*

False positives (as the rule lists them)

• Legitimate activity is expected since compressing files with a password is common.

Tags

• attack.collection
• attack.t1560.001

MITRE ATT&CK ids this rule names

• T1560.001

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1560.001/T1560.001.md

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_7zip_password_compression.yml