Overview

overview

10

Static

static

f43704733f...d1.exe

windows7_x64

10

f43704733f...d1.exe

windows10-2004_x64

10

Sharing

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General

  • Target
    f43704733fbb8efbc457bb922c529df7e358cd26f7d99f0ec4c4cbb748d816d1
  • Size 557KB
  • Sample220512-s24bjsacg9
  • SHA256 f43704733fbb8efbc457bb922c529df7e358cd26f7d99f0ec4c4cbb748d816d1
  • MD5 SHA1 SHA512
Score
10/10
quasarvenomratoffice04persistenceratrootkitspywarestealersuricatatrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 2.1.0.0

Botnet

  • Office04

C2

  • 127.0.0.1:4782

Mutex

  • VNM_MUTEX_iRne81OIv7xHkBnmxo

Attributes
  • encryption_key

    btGyLN1mMyjkKPSibgiM

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      f43704733fbb8efbc457bb922c529df7e358cd26f7d99f0ec4c4cbb748d816d1
    • Size 557KB
    • SHA256 f43704733fbb8efbc457bb922c529df7e358cd26f7d99f0ec4c4cbb748d816d1
    • MD5 SHA1 SHA512
    Score
    10/10
    quasarvenomratoffice04persistenceratrootkitspywarestealersuricatatrojan

    • 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.

      trojanspywarequasar

    • VenomRAT

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

      ratrootkitstealervenomrat

    • suricata: ET MALWARE Common RAT Connectivity Check Observed

      suricata: ET MALWARE Common RAT Connectivity Check Observed

      suricata

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • 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.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks