Suspicious Java Archive Execution from User Download Path via SambaSpy

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-10-07
Updated
2026-10-07

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 Java executing a JAR file from a user temp, downloads, or roaming directory, the delivery pattern used by the SambaSpy campaign to run its Java RAT dropper after a phishing lure. Java processes launching archives from these user-writable paths distinguish malicious loaders from installed Java applications.

Related detections9 linkedT1204.002 — drag to rearrange
Malicious Office Application Spawning Command Interpreter
Suspicious Office Application Spawning Script Interpreter
Suspicious Microsoft Word Spawning PowerShell
Malicious Office Application Spawning PowerShell with Encoded Command
Suspicious Script Interpreter Executing JavaScript from Temp Folder
Malicious Bumblebee WebDAV Share Mount via LNK
Malicious OpenClaw Stealer Electron Staging Directory Creation
Suspicious MSI Execution Disguised as Network Solutions Agreement
Suspicious Search-ms URI Handler Abuse to Remote Share
Suspicious Java Archive Execution from User Download Path via SambaSpy
Pivot detection · T1204.002 · 9 related

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