Suspicious Payload Retrieval from Cloudflare Tunnel via LOLBin (via process_creation)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-07-21
Updated
2026-08-28

ATT&CK techniques

C2
  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. Exfiltration

  13. Impact

What it detects

This rule detects Windows script and download utilities referencing a trycloudflare.com tunnel hostname on their command line, an infrastructure pattern used by PythonRatLoader to stage batch, WebDAV and Python payloads. Cloudflare quick tunnels are occasionally used by developers so context should be reviewed.

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Suspicious Payload Retrieval from Cloudflare Tunnel via LOLBin (via process_creation)
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Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.