sigmalowHunting

Compressed File Creation Via Tar.EXE

Detects execution of "tar.exe" in order to create a compressed file. Adversaries may abuse various utilities to compress or encrypt data before exfiltration.

MITRE ATT&CK

T1560 T1560.001

collectionexfiltration

Detection Query

selection_img:
  - Image|endswith: \tar.exe
  - OriginalFileName: bsdtar
selection_create:
  CommandLine|contains:
    - -c
    - -r
    - -u
condition: all of selection_*

Author

Nasreddine Bencherchali (Nextron Systems), AdmU3

Created

2023-12-19

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.collectionattack.exfiltrationattack.t1560attack.t1560.001

Raw Content

title: Compressed File Creation Via Tar.EXE
id: 418a3163-3247-4b7b-9933-dcfcb7c52ea9
status: test
description: |
    Detects execution of "tar.exe" in order to create a compressed file.
    Adversaries may abuse various utilities to compress or encrypt data before exfiltration.
references:
    - https://unit42.paloaltonetworks.com/chromeloader-malware/
    - https://lolbas-project.github.io/lolbas/Binaries/Tar/
    - https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/cicada-apt10-japan-espionage
author: Nasreddine Bencherchali (Nextron Systems), AdmU3
date: 2023-12-19
tags:
    - attack.collection
    - attack.exfiltration
    - attack.t1560
    - attack.t1560.001
logsource:
    product: windows
    category: process_creation
detection:
    selection_img:
        - Image|endswith: '\tar.exe'
        - OriginalFileName: 'bsdtar'
    selection_create:
        CommandLine|contains:
            - '-c'
            - '-r'
            - '-u'
    condition: all of selection_*
falsepositives:
    - Likely
level: low