Suspicious Winlogon AutoAdminLogon Credential Registration

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1547.001Registry Run Keys / Startup Folder
Priv Esc
- T1547.001Registry Run Keys / Startup Folder
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects enabling of Winlogon automatic logon by writing AutoAdminLogon, DefaultUserName or DefaultPassword under the Winlogon key. The ToyMaker access broker set these values so a reboot into their controlled session authenticates automatically, cementing persistence and easing the handoff of the compromised host to extortion affiliates.

Reporting behind it

Related detections9 linkedT1547.001 — drag to rearrange

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Suspicious RunOnce Persistence Pointing to User AppData

Malicious FalseFont Backdoor Run Key Persistence from AppData (via registry_set)

Malicious Registry Run Key Persistence via AHealthDB by Stately Taurus

Suspicious Winlogon AutoAdminLogon Credential Registration

Pivot detection · T1547.001 · 9 related

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

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