BIOCs

Browse the Cortex behavioral indicator of compromise (BIOC) detection rules.

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1 BIOC match the current filters. tactic: TA0005 ✕ technique: T1078 ✕

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  • User account flagged as hidden Informational Evasion

    Look for unsigned processes that add an entry to the hidden users Registry key.

    Indicator:

    Registry action type = all AND registry data = 0 AND registry key name = *SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList Host host os = windows

    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Valid Accounts (T1078)
    Preventable:
    Yes
    Source:
    Palo Alto Networks
    Updated:
    2026-02-11