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Windows file activity matching CrackMapExec/Impacket-secretsdump credential dumping temp output patterns

Alerts on Windows temp file creations consistent with CrackMapExec or Impacket-secretsdump credential dumping activity.

FreeReviewedSigma · High · v2
Product
windows
Category
file_event
Author
SecurityAura (SigmaHQ), DRL 1.1
Published
2022-11-16
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Cred Access

  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 identifies Windows file creation activity consistent with remote credential dumping tools by matching specific temporary filename patterns written by svchost.exe. Attackers commonly use tools like CrackMapExec or Impacket-secretsdump to extract credentials over the network, and these operations may leave recognizable artifacts on disk. Detection relies on file event telemetry that includes the creating process image path and the target filename matching the defined pattern.

Reporting behind it

Related detections9 linkedT1003 — drag to rearrange
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Malicious Diskshadow Command Abuse to Expose VSS Backup (via process_creation)
Malicious IIS Application Pool Credential Dumping (via process_creation)
Malicious Wdigest Authentication Enabled - Registry (via registry_set)
Suspicious Veeam Backup Credential Harvesting via PowerShell (via ps_script)
Suspicious Network Provider Registration for Credential Interception via NPPSpy
Malicious Mimikatz Malicious Security Package (SSP) Exfiltrates Cleartext Passwords in File (via file_event)
Malicious WDigest UseLogonCredential Enablement For Credential Theft
Linux: Detect changes to fs.suid_dumpable enabling core dumps for SUID processes
Windows file activity matching CrackMapExec/Impacket-secretsdump credential dumping temp output patterns
Pivot detection · T1003 · 9 related

Changelog

v2
  1. v2
    Candidate ingested via manual entry.2026-07-31
  2. v1
    No changelog recorded for this version.2026-07-30

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