General

  • Target
    fbc4fd5e3d3f2b5ccd26807e9e73498b3a3699e7efe35c624fbebcdc2c0c6314
  • Size 757KB
  • Sample220512-n3x4psdec4
  • SHA256 fbc4fd5e3d3f2b5ccd26807e9e73498b3a3699e7efe35c624fbebcdc2c0c6314
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • quasar

Mutex
Attributes
  • encryption_key

  • install_name

  • log_directory

  • reconnect_delay

    3000

  • startup_key

  • subdirectory

Extracted

Family
  • quasar

Version
  • 2.1.0.0

Botnet
  • Office04

C2
  • myconect.ddns.net:6606

Mutex
  • VNM_MUTEX_bW2Pm17MwUNvIYeCrf

Attributes
  • encryption_key

    skMcIyTXgvAaYya6lzLD

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      fbc4fd5e3d3f2b5ccd26807e9e73498b3a3699e7efe35c624fbebcdc2c0c6314
    • Size 757KB
    • SHA256 fbc4fd5e3d3f2b5ccd26807e9e73498b3a3699e7efe35c624fbebcdc2c0c6314
    • MD5 SHA1 SHA512
    • Contains code to disable Windows Defender

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

    • Quasar Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • VenomRAT

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

    • suricata: ET MALWARE Common RAT Connectivity Check Observed

      suricata: ET MALWARE Common RAT Connectivity Check Observed

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks