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Creation of a Local Hidden User Account by Registry

Sysmon registry detection of a local hidden user account.

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Launch
Christian Burkard (Nextron Systems)Created Mon May 03Updated Fri Oct 31460479f3-80b7-42da-9c43-2cc1d54dbccdwindows
Log Source
WindowsRegistry Event
ProductWindows← raw: windows
CategoryRegistry Event← raw: registry_event

Events for Windows Registry modifications including key creation, modification, and deletion.

Detection Logic
Detection Logic1 selector
detection:
    selection:
        TargetObject|contains: '\SAM\SAM\Domains\Account\Users\Names\'
        TargetObject|endswith: '$\(Default)'
        Image|endswith: '\lsass.exe'
    condition: selection
False Positives
Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References
1
Resolving title…
twitter.com
Testing & Validation

Simulations

atomic-red-teamT1564.002
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Create Hidden User in Registry

GUID: 173126b7-afe4-45eb-8680-fa9f6400431c

Regression Tests

by SigmaHQ Team
Positive Detection Test1 matchevtx

Microsoft-Windows-Sysmon

EVTX JSON
MITRE ATT&CK
Rule Metadata
Rule ID
460479f3-80b7-42da-9c43-2cc1d54dbccd
Status
test
Level
high
Type
Detection
Created
Mon May 03
Modified
Fri Oct 31
Author
Christian Burkard (Nextron Systems)
Path
rules/windows/registry/registry_event/registry_event_add_local_hidden_user.yml
Raw Tags
attack.persistenceattack.t1136.001
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