Analytics Alerts

Browse the Cortex analytics alert reference.

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1 alert match the current filters. tactic: TA0112 ✕

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  • Unknown DLL was added to the AD FS Global Assembly Cache path Informational Identity Analytics 1 variation

    A new and unknown DLL was created within the Active Directory Federation Services (AD FS) Global Assembly Cache (GAC). Attackers may manipulate IdentityServer adapters to achieve persistence or execute malicious code within the AD FS environment.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Defense Impairment (TA0112)
    ATT&CK techniques: Modify Authentication Process (T1556)
    Required data: XDR Agent with eXtended Threat Hunting (XTH)
    Detector tags: Active Directory Federation Services Analytics
    Attacker's goals: Attackers may inject malicious code into the AD FS server and manipulate the IdentityServer adapters to gain persistence.
    Investigative actions: Check if the AD FS service was stopped or restarted around the time of modification. Identify the user or process responsible for the file creation. Verify if the DLL is digitally signed by Microsoft. Compare the modification timestamp of this DLL against others in the same directory.

    Variations

    Suspicious DLL was added to the AD FS Global Assembly Cache path

    Low overridden

    A new and unknown DLL was created within the Active Directory Federation Services (AD FS) Global Assembly Cache (GAC). Attackers may manipulate IdentityServer adapters to achieve persistence or execute malicious code within the AD FS environment. overridden