Detectionmediumtest
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.
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kostastsale, TheDFIRReportCreated Sat May 14Updated Fri Aug 239ec9fb1b-e059-4489-9642-f270c207923dwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic1 selector
detection:
selection:
Image|endswith: '\reg.exe'
CommandLine|contains|all:
- '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList'
- 'add'
- '/v'
- '/d 0'
condition: selectionFalse Positives
System administrator activities
References
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
9ec9fb1b-e059-4489-9642-f270c207923d
Status
test
Level
medium
Type
Detection
Created
Sat May 14
Modified
Fri Aug 23
Author
Path
rules/windows/process_creation/proc_creation_win_registry_special_accounts_hide_user.yml
Raw Tags
attack.defense-evasionattack.t1564.002