Suspicious registry modification detected: Hiding user accounts via Userlist key (T1564.002 - Hidden Users)

Description

Suspicious registry modification detected: Hiding user accounts via Userlist key (T1564.002 - Hidden Users)

Query · wazuh

View raw source upstream ↗ Wazuh XML 
field win.eventdata.targetObject="(?i)^HKLM\\\\SOFTWARE\\\\Microsoft\\\\Windows NT\\\\CurrentVersion\\\\Winlogon\\\\SpecialAccounts\\\\Userlist\\\\[^\\]+$"

No license declared

socfortress/Wazuh-Rules publishes no license, and without an express grant the default is all rights reserved. The query above is synthesized from the rule rather than copied out of it, so you can see what the rule matches on; the rule as written stays upstream.

Read the full rule at Windows_Sysmon/112101-MITRE_TECHNIQUES_FROM_SYSMON_EVENT13.xml ↗. Why this rule is treated this way.

Fires when

Wazuh evaluates a chain top-down. Every rule above this one must match on the same event before this rule is tested at all.

  1. 60000 Group of windows rules. anchor level 0
    decoded_as=windows_eventchannel AND field win.system.providerName="\.+"
  2. 60004 Group of Windows rules for the sysmon channel. anchor level 0
    field win.system.channel="^Microsoft-Windows-Sysmon/Operational$"
  3. 61600 Windows Sysmon informational event anchor level 0
    field win.system.severityValue="^INFORMATION$"
  4. 61615 Sysmon - Event 13: RegistryEvent on by · win.system.eventID = 13 anchor level 0
    field win.system.eventID="^13$"
  5. 112148 Suspicious registry modification detected: Hiding user accounts via Userlist key (T1564.002 - Hidden Users) refinement level 10 this rule
    field win.eventdata.targetObject="(?i)^HKLM\\\\SOFTWARE\\\\Microsoft\\\\Windows NT\\\\CurrentVersion\\\\Winlogon\\\\SpecialAccounts\\\\Userlist\\\\[^\\]+$"

Rule dependencies

Depends on

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