Overview

overview

10

Static

static

10

Update.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    Update.exe
  • Size 413KB
  • Sample240812-mxrt3asaqa
  • SHA256 e0e6b3b96f2bfcc2b8b1fd893413848f0de9e10f671b3a4078a7f4557776b331
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04discoveryexecutionspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 3.1.5

Botnet

  • Office04

C2

  • born-brandon.gl.at.ply.gg:55020

Mutex

  • $Sxr-hhtE0U6diMyEc3g5mT

Attributes
  • encryption_key

    EmmKy773MnuMUK4WIMhm

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    SeroXen Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      Update.exe
    • Size 413KB
    • SHA256 e0e6b3b96f2bfcc2b8b1fd893413848f0de9e10f671b3a4078a7f4557776b331
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04discoveryexecutionspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • 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.

    • Drops file in System32 directory

    behavioral1

MITRE ATT&CK Enterprise v15

Tasks