Overview

overview

10

Static

static

3

Vc Redmist steup.exe

windows10-2004-x64

10

Vc Redmist steup.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    Vc Redmist steup.exe
  • Size 523KB
  • Sample260802-x97fdsfj7t
  • SHA256 8754bcc96e84431f40394affdd9b71a06879036ce93aaf05e6b0f754e50ba820
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04discoveryexecutionpersistencespywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 3.1.5

Botnet

  • Office04

C2

  • rat.ethanremote.co.uk:443

Mutex

  • $Sxr-BSS0oNqU5nWv8vBZ8I

Attributes
  • encryption_key

    JlX01yUyffjrDJd5RKIV

  • install_name

    subDirsystem.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows BootManger

  • subdirectory

    SubDir

Targets

    • Target
      Vc Redmist steup.exe
    • Size 523KB
    • SHA256 8754bcc96e84431f40394affdd9b71a06879036ce93aaf05e6b0f754e50ba820
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04discoveryexecutionquasarpersistencespywaretrojan

    • Family: 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.

      discovery
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks