Malicious Nimbus RAT Java Archive Execution From ProgramData

PremiumReviewedSigma · High · v1
Category
process_creation
Author
HuntRule
Published
2026-09-22
Updated
2026-09-22

ATT&CK techniques

Execution
  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. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects javaw.exe running the InboxCorePro Java archive used by the Nimbus RAT that is delivered through Microsoft Teams social engineering and Google Drive staging. The malware installs under ProgramData InboxCorePro and executes its Java payload silently. This launch confirms the Java remote access trojan is active on the endpoint.

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Malicious Nimbus RAT Java Archive Execution From ProgramData
Pivot detection · T1059.007 · 9 related

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