IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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SoftwareUpdate Preferences Modification

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SoftwareUpdate Preferences Modification

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Identifies changes to the SoftwareUpdate preferences using the built-in defaults command. Adversaries may abuse this in an attempt to disable security updates.

Rule type: query

Rule indices:

logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5m

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

Maximum alerts per execution: 100

References:

https://blog.checkpoint.com/2017/07/13/osxdok-refuses-go-away-money/

Tags:

Domain: Endpoint
OS: macOS
Use Case: Threat Detection
Tactic: Defense Evasion
Data Source: Elastic Defend

Version: 105

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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event.category:process and host.os.type:macos and event.type:(start or process_started) and
 process.name:defaults and
 process.args:(write and "-bool" and (com.apple.SoftwareUpdate or /Library/Preferences/com.apple.SoftwareUpdate.plist) and not (TRUE or true))

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Impair Defenses
- ID: T1562
- Reference URL: https://attack.mitre.org/techniques/T1562/
Sub-technique:
- Name: Disable or Modify Tools
- ID: T1562.001
- Reference URL: https://attack.mitre.org/techniques/T1562/001/

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