Suspicious Discovery Command Spawned by Java Process

PremiumReviewedSigma · High · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-08-20
Updated
2026-08-28

ATT&CK techniques

Discovery
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Lateral Movement

  10. Collection

  11. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects the Cleo Java runtime spawning Windows discovery utilities such as nltest, whoami, and ipconfig, the hands-on-keyboard reconnaissance seen after exploitation of Cleo file transfer software and the Malichus malware. A Java service process launching domain and host enumeration is not part of normal operation. This lineage indicates active post-exploitation of an internet-facing Cleo server.

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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.