huntrule

Suspicious File Copy to Administrative SMB Share via net.exe (via process_creation)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-10-03
Updated
2026-10-03
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 enumeration or use of administrative SMB shares such as C dollar through net.exe as part of lateral movement. VanHelsing maps administrative shares to copy its payload across hosts, so referencing an admin share via net commands is a lateral-movement indicator.

Reporting behind it

Related detections9 linkedT1021.002 — drag to rearrange
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
Malicious REF5961 PsExec-Style Remote Service Execution from Windows Help Directory via Process Creation
Suspicious Access to Citrix Session Evidence Registry Keys
Suspicious Ransomware Fan-Out Deployment via PsExec Spread (Qilin)
Suspicious Impacket smbexec Command Execution Pattern
Malicious Impacket Wmiexec Remote Command Execution Pattern
Suspicious File Copy to Administrative SMB Share via net.exe (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.