Suspicious Node.js Spawning Python or Tar Interpreter

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.006Python
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects node.exe spawning python.exe or tar.exe which reflects the Lazarus loader chain where a malicious server.js executes downloaded Python payloads and unpacks archives. The behaviour extracts and runs second-stage InvisibleFerret and BeaverTail components. It is important because it reveals code execution smuggled through a seemingly benign development runtime.

Reporting behind it

Related detections9 linkedT1059.006 — drag to rearrange

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Suspicious Python Loader Execution from Public Directory

Suspicious Python Executing Staged Script From Temp Directory via DPRK Pyperclip Loader

Suspicious KANDYKORN Python Loader Execution via Process Creation

Suspicious Wscript Spawning Embedded Python Interpreter (via process_creation)

Suspicious Child Process Spawned by Python Interpreter via Process Creation

Suspicious Kimsuky Python Backdoor Staging in Winii Directory (via file_event)

Suspicious Node.js Spawning Python or Tar Interpreter

Pivot detection · T1059.006 · 9 related

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

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