Suspicious Hidden Child Process of Launchd

Elastic Stack Serverless Security

Identifies the execution of a launchd child process with a hidden file. An adversary can establish persistence by installing a new logon item, launch agent, or daemon that executes upon login.

Rule type: query

Rule indices:

• auditbeat-*
• logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References:

• https://objective-see.com/blog/blog_0x61.html
• https://www.intezer.com/blog/research/operation-electrorat-attacker-creates-fake-companies-to-drain-your-crypto-wallets/
• https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPSystemStartup/Chapters/CreatingLaunchdJobs.html

Tags:

• Elastic
• Host
• macOS
• Threat Detection
• Persistence
• Defense Evasion

Version: 101

Rule authors:

• Elastic

Rule license: Elastic License v2

event.category:process and event.type:(start or process_started) and
 process.name:.* and process.parent.executable:/sbin/launchd

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Persistence
  • ID: TA0003
  • Reference URL: https://attack.mitre.org/tactics/TA0003/

• Technique:

  • Name: Create or Modify System Process
  • ID: T1543
  • Reference URL: https://attack.mitre.org/techniques/T1543/

• Sub-technique:

  • Name: Launch Agent
  • ID: T1543.001
  • Reference URL: https://attack.mitre.org/techniques/T1543/001/

• Tactic:

  • Name: Defense Evasion
  • ID: TA0005
  • Reference URL: https://attack.mitre.org/tactics/TA0005/

• Technique:

  • Name: Hide Artifacts
  • ID: T1564
  • Reference URL: https://attack.mitre.org/techniques/T1564/

• Sub-technique:

  • Name: Hidden Files and Directories
  • ID: T1564.001
  • Reference URL: https://attack.mitre.org/techniques/T1564/001/