Potential GobRAT File Discovery Via Grep

Description

Detects the use of grep to discover specific files created by the GobRAT malware

Query · sigma

selection:
  Image|endswith: /grep
  CommandLine|contains:
  - apached
  - frpc
  - sshd.sh
  - zone.arm
condition: selection

Known false positives

  • Unknown
Raw source Potential GobRAT File Discovery Via Grep · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Potential GobRAT File Discovery Via Grep
id: e34cfa0c-0a50-4210-9cb3-5632d08eb041
status: test
description: Detects the use of grep to discover specific files created by the GobRAT malware
references:
    - https://blogs.jpcert.or.jp/en/2023/05/gobrat.html
    - https://www.virustotal.com/gui/file/60bcd645450e4c846238cf0e7226dc40c84c96eba99f6b2cffcd0ab4a391c8b3/detection
    - https://www.virustotal.com/gui/file/3e44c807a25a56f4068b5b8186eee5002eed6f26d665a8b791c472ad154585d1/detection
author: Joseliyo Sanchez, @Joseliyo_Jstnk
date: 2023-06-02
tags:
    - attack.discovery
    - attack.t1082
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith: '/grep'
        CommandLine|contains:
            - 'apached'
            - 'frpc'
            - 'sshd.sh'
            - 'zone.arm'
    condition: selection
falsepositives:
    - Unknown
level: high

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