Malicious TCC AppleEvents Reset via Tccutil

PremiumReviewedSigma · High · v1
Product
macos
Category
process_creation
Author
HuntRule
Published
2026-10-21
Updated
2026-10-21

ATT&CK techniques

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule detects the tccutil command resetting the AppleEvents privacy permissions, which clears prior automation consent so the malware can re-prompt or re-establish control of other applications. XCSSET v4.0 resets AppleEvents to enable its AppleScript-driven automation. Detecting this reset surfaces manipulation of the macOS privacy framework for defense evasion.

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Malicious TCC AppleEvents Reset via Tccutil
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.