General

  • Target

    7cbcebf57f666bc42f8e6b3bba459cf968d19690e7d983e943b77fb97acb487d

  • Size

    1.0MB

  • Sample

    230129-v3lt1aha2w

  • MD5

    1def40ae6fbb8b8f438b7370a6f4ab2d

  • SHA1

    0f59d0792f223b54901e109f5ae98a3ec4acc049

  • SHA256

    7cbcebf57f666bc42f8e6b3bba459cf968d19690e7d983e943b77fb97acb487d

  • SHA512

    f3554bf9d7ba8bd1fbe137c4da19b99a2f486456b3e61e909b3b13af724244d9fe0cf421678d247ceb3934d1c928d203847a4e487f3fcf797cdc45a86ffd599d

  • SSDEEP

    24576:+cvkTLn+3Z3dwNTY8wKxHCtAxlSPU5JpoLww2A716yGGMaYnHfGZgj9h1i:ZvkTD+3Z3ypYNKBIAzSPwD8EQ/q/qgI

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

127.0.0.1:4782

rat94522.ddnsking.com:4000

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    WIwQFd2V7FhUXFH7QX71

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      7cbcebf57f666bc42f8e6b3bba459cf968d19690e7d983e943b77fb97acb487d

    • Size

      1.0MB

    • MD5

      1def40ae6fbb8b8f438b7370a6f4ab2d

    • SHA1

      0f59d0792f223b54901e109f5ae98a3ec4acc049

    • SHA256

      7cbcebf57f666bc42f8e6b3bba459cf968d19690e7d983e943b77fb97acb487d

    • SHA512

      f3554bf9d7ba8bd1fbe137c4da19b99a2f486456b3e61e909b3b13af724244d9fe0cf421678d247ceb3934d1c928d203847a4e487f3fcf797cdc45a86ffd599d

    • SSDEEP

      24576:+cvkTLn+3Z3dwNTY8wKxHCtAxlSPU5JpoLww2A716yGGMaYnHfGZgj9h1i:ZvkTD+3Z3ypYNKBIAzSPwD8EQ/q/qgI

    • Contains code to disable Windows Defender

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

    • Modifies Windows Defender Real-time Protection settings

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • VenomRAT

      VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

    • Executes dropped EXE

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Windows security modification

    • 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 v6

Tasks