General

  • Target

    overwriteb.exe

  • Size

    1.2MB

  • Sample

    240810-s3j93awbmr

  • MD5

    ebbffaed3eb2974391bc88d919954428

  • SHA1

    e6b4daacce77720602bc1f2adf65909276eaa51b

  • SHA256

    00d22853c3a9e4287c81293cc4a2a524bbe21f6d802e19673cac57dad7b88f8f

  • SHA512

    a4dab6710bc38a5201c3ddb2bd5d7c339375228f9cbc9ddc0be4e35e46d6dd0ea95ccebdf9ab20ce3cc9a1481ffcd1b384b08d198705bf7a67a52ca4a1b9c292

  • SSDEEP

    12288:V122aNMTqnYx6QZ7aUXYXVeCHkAVz5CntHsh9Z+DX87Kf+iXhhnCkAclRXhyxVUx:sNMTqnYx6QZ7aU0VuMKf7nCkAMS

Malware Config

Targets

    • Target

      overwriteb.exe

    • Size

      1.2MB

    • MD5

      ebbffaed3eb2974391bc88d919954428

    • SHA1

      e6b4daacce77720602bc1f2adf65909276eaa51b

    • SHA256

      00d22853c3a9e4287c81293cc4a2a524bbe21f6d802e19673cac57dad7b88f8f

    • SHA512

      a4dab6710bc38a5201c3ddb2bd5d7c339375228f9cbc9ddc0be4e35e46d6dd0ea95ccebdf9ab20ce3cc9a1481ffcd1b384b08d198705bf7a67a52ca4a1b9c292

    • SSDEEP

      12288:V122aNMTqnYx6QZ7aUXYXVeCHkAVz5CntHsh9Z+DX87Kf+iXhhnCkAclRXhyxVUx:sNMTqnYx6QZ7aU0VuMKf7nCkAMS

    • Possible privilege escalation attempt

    • Checks computer location settings

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

    • Modifies file permissions

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

MITRE ATT&CK Enterprise v15

Tasks