Dumping Account Hashes via Built-In Commands

Elastic Stack Serverless Security

Identifies the execution of macOS built-in commands used to dump user account hashes. Adversaries may attempt to dump credentials to obtain account login information in the form of a hash. These hashes can be cracked or leveraged for lateral movement.

Rule type: query

Rule indices:

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

Severity: high

Risk score: 73

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://apple.stackexchange.com/questions/186893/os-x-10-9-where-are-password-hashes-stored
• https://www.unix.com/man-page/osx/8/mkpassdb/

Tags:

• Elastic
• Host
• macOS
• Threat Detection
• Credential Access

Version: 101

Rule authors:

• Elastic

Rule license: Elastic License v2

event.category:process and event.type:start and
 process.name:(defaults or mkpassdb) and process.args:(ShadowHashData or "-dump")

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Credential Access
  • ID: TA0006
  • Reference URL: https://attack.mitre.org/tactics/TA0006/

• Technique:

  • Name: OS Credential Dumping
  • ID: T1003
  • Reference URL: https://attack.mitre.org/techniques/T1003/