Suspicious Remote Script Execution via curl Piped to bash with nohup on macOS (via process_creation)

PremiumReviewedSigma · Medium · v1
Product
macos
Category
process_creation
Author
HuntRule
Published
2026-08-10
Updated
2026-08-28

ATT&CK techniques

Execution → C2
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Persistence

  5. Priv Esc

  6. Defense Evasion

  7. Cred Access

  8. Discovery

  9. Lateral Movement

  10. Collection

  11. Exfiltration

  12. Impact

What it detects

This rule detects a shell command that pipes curl output into bash and detaches it with nohup, the initial execution used by a macOS ClickFix campaign to run an AppleScript stealer in the background after terminal closure. Fetching and executing a remote script in one detached command with no visible output is a strong indicator of ClickFix-style delivery on macOS.

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Pivot detection · T1059.004 · 9 related

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