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Execution with Explicit Credentials via Scripting

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Execution with Explicit Credentials via Scripting

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Identifies execution of the security_authtrampoline process via a scripting interpreter. This occurs when programs use AuthorizationExecute-WithPrivileges from the Security.framework to run another program with root privileges. It should not be run by itself, as this is a sign of execution with explicit logon credentials.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Host
macOS
Threat Detection
Execution
Privilege Escalation

Version: 2 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 7.12.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

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event.category:process and event.type:(start or process_started) and
process.name:"security_authtrampoline" and
process.parent.name:(osascript or com.apple.automator.runner or sh or
bash or dash or zsh or python* or perl* or php* or ruby or pwsh)

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
Technique:
- Name: Valid Accounts
- ID: T1078
- Reference URL: https://attack.mitre.org/techniques/T1078/
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/

Rule version history

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Version 2 (7.12.0 release)

Rule name changed from: Execution with Explicit Credentials via Apple Scripting

Updated query, changed from:

sequence by host.id with maxspan=5s [process where event.type in
("start", "process_started", "info") and process.name == "osascript"]
by process.pid [process where event.type in ("start",
"process_started") and process.name == "security_authtrampoline"] by
process.ppid

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