Suspicious Project CAV3RN logAzure.txt Configuration Drop (via file_event)

PremiumReviewedSigma · Medium · v1
Category
file_event
Author
HuntRule
Published
2026-07-05
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 creation of a file named logAzure.txt, a configuration artifact written by the Project CAV3RN espionage framework that abuses Outlook calendar events and DNS for command-and-control. The fixed configuration filename is a distinctive host-based indicator of this framework staging its settings on disk.

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Suspicious Project CAV3RN logAzure.txt Configuration Drop (via file_event)
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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.