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    All Detections

    Brute Force Attack - Remote Logon Failures

    avatar
    GlassDiceBearhttps://www.dicebear.comhttps://creativecommons.org/publicdomain/zero/1.0/„Glass” (https://www.dicebear.com) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)
    Ibrahim Saud@tektrix
    •updated Jun 19, 2026•20•0•73

    Detects patterns indicative of automated brute-force attacks against authentication interfaces by counting consecutive remote logon failures for single user accounts. This behavior was observed in the FortiBleed campaign targeting Fortinet devices.

    Microsoft Sentinel (KQL)

    Tags

    T1110 - Brute ForceTA0006 - Credential AccessAuthentication FailureExploit AttemptWindowsWindows Eventlog Securitysplkql

    Found in

    • FortiBleed Credential Harvesting Targeting Global Fortinet DevicesLast updated Jun 19, 2026
    • Gentlemen RaaS and FortiBleed Credential Leak AnalysisLast updated Jun 19, 2026
    • Gentlemen RaaS and FortiBleed Credential Leak AnalysisLast updated Jun 19, 2026

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