Get-ADUser Enumeration Using UserAccountControl Flags

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About the rule

Rule Type

Standard

Rule Description

Detects AS-REP roasting is an attack that is often-overlooked. It is not very common as you have to explicitly set accounts that do not require pre-authentication.

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "PowerShell Script Block Logged" AND SCRIPTEXECUTED contains "Get-ADUser" AND SCRIPTEXECUTED contains "-Filter" AND SCRIPTEXECUTED contains "useraccountcontrol" AND SCRIPTEXECUTED contains "-band" AND SCRIPTEXECUTED contains "4194304" select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED

Detection

Execution Mode

realtime

Log Sources

Active Directory

Author

frack113