huntrule

Suspicious SMB Admin Share Mapping for Lateral Tool Transfer (via process_creation)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-10-19
Updated
2026-10-19
AnalysisDetection

ATT&CK techniques

Lateral Movement

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule detects mapping of a remote C$ administrative share with net use, the step Jumpy Pisces used to copy malware to peer hosts over SMB before deploying Play ransomware. Mounting admin shares to stage tooling is a common lateral-movement precursor to network-wide encryption.

Reporting behind it

Related detections9 linkedT1021.002 — drag to rearrange
Suspicious Impacket Remote Execution Tool Usage via process_creation
Suspicious Remote Service Execution via PsExec (via process_creation)
Suspicious RemCom Service Named Pipe for Lateral Movement (via pipe_created)
Suspicious WMIC Remote Process Creation for Lateral Movement
Suspicious File Copy to Administrative SMB Share via net.exe (via process_creation)
Malicious PsExec Service Binary Execution from Windows Directory via services.exe (via process_creation)
Malicious Remote Command Execution via smbexec Output Redirection Pattern
Malicious Lateral Movement via PsExec File-List Target
Suspicious Remote Process Creation and Admin Share Copy via WMIC and Xcopy
Suspicious SMB Admin Share Mapping for Lateral Tool Transfer (via process_creation)
Pivot detection · T1021.002 · 9 related

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