Overview

overview

10

Static

static

3

389c77b4d5...aN.exe

windows7-x64

10

389c77b4d5...aN.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN
  • Size 816KB
  • Sample241027-tkc9gaxjan
  • SHA256 389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87a
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04discoveryexecutionspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.3.0.0

Botnet

  • Office04

C2

  • ronymahmoud.casacam.net:4782

  • sk.servemp3.com:4782

Mutex

  • QSR_MUTEX_ewyaHKCedalfiUvTpL

Attributes
  • encryption_key

    6LTEKnkEacVI1BGQJRaJ

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN
    • Size 816KB
    • SHA256 389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87a
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04discoveryexecutionspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar family

      quasar

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Checks computer location settings

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

    • 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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks