Extracted

• • Target

    BootstrapperV18.exe

  • Size

    67KB

  • MD5

    3f194cb392261195f6354bfefacc8df6

  • SHA1

    35ed93df509fb3b34cdcd6f39c645a8bc9bc63e5

  • SHA256

    b97e386e681f0aa6c3ffb15d972dfb7aed7b3ea5711d6e105850800a9688643e

  • SHA512

    f08bd41e4ed678f6ad315e0ef843110bc03c239b9b4f7bc3c45e3b5f1f16dde791b86cbb7289f1da962047605287c3e1d0da678572836f7965b2d42c595250e2

  • SSDEEP

    1536:I06pVXzKc2nHLPdKLi/5F26T15TkbOLmobtO7hKD:I0BLnrMLi/O6TTkbOL7btO7ID

  Score

  10^/10

  umbralxwormbootkitpersistenceratstealertrojan

  • 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 Umbral payload

  • Detect Xworm Payload

  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

    stealerumbral

  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm

  • Checks computer location settings

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

  • Drops startup file

  • Executes dropped EXE

  • Adds Run key to start application

    persistence

  • Looks up external IP address via web service

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

  • Writes to the Master Boot Record (MBR)

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

    bootkitpersistence
  behavioral1