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General

  • Target

    RuntimeBroker.exe

  • Size

    77KB

  • Sample

    240217-xcw86ahg9z

  • MD5

    7f3d8bc2d995a6d0780aeb80c3172a82

  • SHA1

    781de6ee7e83ce7d159031f16e9677d7aff91516

  • SHA256

    4288137e125d257cce26bdabf57533f03f8aa7476ab6f3c33bc009d3a9f81df0

  • SHA512

    a6997ecde20919abc259b37bd8352b79908e0a0aab6a78cb8293d676e1249af66deeffd8d545227b17513f725a22f0503fa321403cf3c4f40811f8d58cce87cd

  • SSDEEP

    1536:N0A5d1cL+IvRpH4/NbbnjIvUG64OeTIOMbeeSTuX1kC47:NDq5pHyNb3MdTIOweeIK1kP7

Malware Config

Extracted

Family

xworm

C2

K1NGonTop-39501.portmap.io:39501

<Xwormmm>:1

Attributes
  • Install_directory

    %Public%

  • install_file

    RuntimeBroker.exe

Targets

    • Target

      RuntimeBroker.exe

    • Size

      77KB

    • MD5

      7f3d8bc2d995a6d0780aeb80c3172a82

    • SHA1

      781de6ee7e83ce7d159031f16e9677d7aff91516

    • SHA256

      4288137e125d257cce26bdabf57533f03f8aa7476ab6f3c33bc009d3a9f81df0

    • SHA512

      a6997ecde20919abc259b37bd8352b79908e0a0aab6a78cb8293d676e1249af66deeffd8d545227b17513f725a22f0503fa321403cf3c4f40811f8d58cce87cd

    • SSDEEP

      1536:N0A5d1cL+IvRpH4/NbbnjIvUG64OeTIOMbeeSTuX1kC47:NDq5pHyNb3MdTIOweeIK1kP7

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Deletes itself

    • Drops startup file

    • Executes dropped EXE

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks