Detectionmediumtest
Compress Data and Lock With Password for Exfiltration With 7-ZIP
An adversary may compress or encrypt data that is collected prior to exfiltration using 3rd party utilities
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Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic3 selectors
detection:
selection_img:
- Description|contains: '7-Zip'
- Image|endswith:
- '\7z.exe'
- '\7zr.exe'
- '\7za.exe'
- OriginalFileName:
- '7z.exe'
- '7za.exe'
selection_password:
CommandLine|contains: ' -p'
selection_action:
CommandLine|contains:
- ' a '
- ' u '
condition: all of selection_*False Positives
Legitimate activity is expected since compressing files with a password is common.
References
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
9fbf5927-5261-4284-a71d-f681029ea574
Status
test
Level
medium
Type
Detection
Created
Tue Jul 27
Modified
Mon Mar 13
Author
Path
rules/windows/process_creation/proc_creation_win_7zip_password_compression.yml
Raw Tags
attack.collectionattack.t1560.001