Malicious Disabling of macOS Automatic Software Updates via Defaults

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects use of the defaults command to turn off automatic macOS software update checks or downloads. The XCSSET v4.0 malware disables SoftwareUpdate AutomaticCheckEnabled and AutomaticDownload to keep the host on vulnerable software and preserve its foothold. Detecting this configuration change exposes defense evasion that weakens the system patch posture.

Reporting behind it

Related detections9 linkedT1685 — drag to rearrange

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Malicious Disabling of macOS Automatic Software Updates via Defaults

Pivot detection · T1685 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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