General

  • Target

    fugelatogoan.bat

  • Size

    516KB

  • Sample

    240508-td3wjseg22

  • MD5

    441fb12fd410cc730b25b879fcfe2d29

  • SHA1

    b958859d1f90eec6a36eab2ffcf4de70db335eeb

  • SHA256

    0d7b96872fddd86198ffb9096c4c03d0a5bb3c0fb80e214e855c22e04fc23208

  • SHA512

    5d401519488cddf4c8c37494beb66b3bb56a3715554385ab210fb600986152071759473f6f5e755fa9014c26cc7a3ce4abd7d90b5bea894b36288dc8331153f6

  • SSDEEP

    12288:GAhqQ5buCyD3bfLOhflJ1iNSN8cm/yL/iWPuGApijcnuv:GWquobMvkNG0/y+WVAp8v

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

Office04

C2

co-characteristic.gl.at.ply.gg:47053

Mutex

$Sxr-EsxA4u97DvLjxNaZKx

Attributes
  • encryption_key

    j3tUM1uwtu9HVTRdeIHv

  • install_name

    vsscript.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    SeroXen Client Startup

  • subdirectory

    VSOutputs

Targets

    • Target

      fugelatogoan.bat

    • Size

      516KB

    • MD5

      441fb12fd410cc730b25b879fcfe2d29

    • SHA1

      b958859d1f90eec6a36eab2ffcf4de70db335eeb

    • SHA256

      0d7b96872fddd86198ffb9096c4c03d0a5bb3c0fb80e214e855c22e04fc23208

    • SHA512

      5d401519488cddf4c8c37494beb66b3bb56a3715554385ab210fb600986152071759473f6f5e755fa9014c26cc7a3ce4abd7d90b5bea894b36288dc8331153f6

    • SSDEEP

      12288:GAhqQ5buCyD3bfLOhflJ1iNSN8cm/yL/iWPuGApijcnuv:GWquobMvkNG0/y+WVAp8v

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Executes dropped EXE

    • 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