Suspicious WDigest UseLogonCredential Enablement for Plaintext Credential Theft (via registry_set)

PremiumReviewedSigma · High · v1
Product
windows
Category
registry_set
Author
HuntRule
Published
2026-09-05
Updated
2026-09-05

ATT&CK techniques

Persistence → Defense Evasion
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Priv Esc

  6. Defense Evasion

  7. Cred Access

  8. Discovery

  9. Lateral Movement

  10. Collection

  11. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects setting the WDigest UseLogonCredential value which forces Windows to cache plaintext credentials in memory as observed in the SoftEther VPN intrusion. Enabling this value is a credential access preparation step ahead of memory dumping.

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Suspicious WDigest UseLogonCredential Enablement for Plaintext Credential Theft (via registry_set)
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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.