Hiding User Account Via SpecialAccounts Registry Key - CommandLine
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About the rule
Rule Type
Standard
Rule Description
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.
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND PROCESSNAME endswith "\reg.exe" AND (COMMANDLINE contains "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList" AND COMMANDLINE contains "add" AND COMMANDLINE contains "/v" AND COMMANDLINE contains "/d 0")
select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME,Action1.DOMAIN,Action1.ORIGINALFILENAME,Action1.PARENTPROCESSID,Action1.PROCESSID,Action1.PRODUCT_NAME,Action1.SECURITYID
Detection
Execution Mode
realtime
Log Sources
Windows
Author
@Kostastsale, @TheDFIRReport
