Overview

overview

10

Static

static

10

Client-built.exe

windows10-1703-x64

10

Client-built.exe

windows10-2004-x64

10

Client-built.exe

windows11-21h2-x64

10

Sharing

Copy URL Twitter E-mail

General

  • Target
    Client-built.exe
  • Size 348KB
  • Sample240302-y222dahe22
  • SHA256 962f5a44ad1a7fe0781c01c461abba727d835da9a35b01b9e507c0538a58ac67
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.3.0.0

Botnet

  • Office04

C2

  • E7Team-54210.portmap.host:54210

Mutex

  • QSR_MUTEX_sCp3fGDikoygyZjv1p

Attributes
  • encryption_key

    MBC9SuMUPOlaVvtBf63w

  • install_name

    SystemConfig.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WindowsClient.exe

  • subdirectory

    SubDir

Targets

    • Target
      Client-built.exe
    • Size 348KB
    • SHA256 962f5a44ad1a7fe0781c01c461abba727d835da9a35b01b9e507c0538a58ac67
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • 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.

    behavioral1behavioral2behavioral3

MITRE ATT&CK Enterprise v15

Tasks