Suspicious PowerShell Download of lib.zip Archive

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-09-11
Updated
2026-09-11

ATT&CK techniques

Execution → C2
  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. Exfiltration

  12. Impact

What it detects

This rule detects PowerShell using Invoke-WebRequest or curl to download an archive named lib.zip. Famous Chollima's Python GolangGhost RAT chain fetches this archive, which is then unpacked and used to launch a renamed Python interpreter, so this ingress step precedes RAT execution and Run-key persistence.

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Suspicious PowerShell Download of lib.zip Archive
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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.