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MediumSigmaHQ @Kostastsale +1

Hiding User Account Via SpecialAccounts Registry Key - CommandLine

Detects changes to the registry key "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\Userlist" where the value is set to "0" in order to hide user account from being listed on the logon screen.

Detection logic

Detection requirements

Platform: Linux macOS Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: windows
Log source category: process_creation

Known benign triggers

System administrator activities

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
thedfirreport.com/2022/07/11/select-xmrig-from-sqlserver/	Threat report	10from 3 sources
thedfirreport.com/2024/01/29/buzzing-on-christmas-eve-trigona-ransomware-in-3-hours/	Threat report	Only this detection cites it
thedfirreport.com/2024/04/01/from-onenote-to-ransomnote-an-ice-cold-intrusion/	Threat report	2from 2 sources
thedfirreport.com/2024/04/29/from-icedid-to-dagon-locker-ransomware-in-29-days/	Threat report	Only this detection cites it

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