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    BragJack: Hijacked AI browser agent exfiltrates webmail summary with no user click

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    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/)
    Arnold Chan@slaz
    •updated 22 days ago•0•0•1

    Detects browser activity where a user agent navigates to common webmail services (Gmail, Outlook) followed quickly by network traffic to potentially malicious external infrastructure or non-standard endpoints, suggesting unauthorized email content exfiltration.

    Microsoft Sentinel (KQL)

    Tags

    T1114.002 - Remote Email CollectionT1071.001 - Web ProtocolsTA0009 - CollectionNetwork Connection OutboundData ExfiltrationWindowsWindows Defender Atpkql

    Found in

    • BragJack: Browser Extension Attack Hijacks AI AssistantsLast updated 22 days ago
    • BragJack: Browser Extension Attack Hijacks AI AssistantsLast updated 22 days ago
    • BragJack: Browser Extension Attack Hijacks AI AssistantsLast updated 22 days ago
    • BragJack: Browser Extension Attack Hijacks AI AssistantsLast updated 22 days ago
    • BragJack: Browser Extension Attack Hijacks AI AssistantsLast updated 22 days ago

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