Suspicious History File Operations — Sigma Rule

Rule metadata and linked tags

Author: Mikhail Larin, oscd.community. Source status: test; severity: medium. Source dates: 2020-10-17 / 2021-11-27.

{
  "product": "macos",
  "category": "process_creation"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 45bc904445f08d8c9eaaf22fe75f76a4fa5cd7ea2afe8e2784e2f50b9fc75dba

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Suspicious History File Operations
id: 508a9374-ad52-4789-b568-fc358def2c65
status: test
description: Detects commandline operations on shell history files
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1552.003/T1552.003.md
author: 'Mikhail Larin, oscd.community'
date: 2020-10-17
modified: 2021-11-27
tags:
    - attack.credential-access
    - attack.t1552.003
logsource:
    product: macos
    category: process_creation
detection:
    selection:
        CommandLine|contains:
            - '.bash_history'
            - '.zsh_history'
            - '.zhistory'
            - '.history'
            - '.sh_history'
            - 'fish_history'
    condition: selection
falsepositives:
    - Legitimate administrative activity
    - Legitimate software, cleaning hist file
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate administrative activity
• Legitimate software, cleaning hist file

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1552.003/T1552.003.md