Overview

overview

10

Static

static

1

Client-built.bat

windows10-2004-x64

10

Client-built.bat

windows11-21h2-x64

10

Sharing

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General

  • Target
    Client-built.bat
  • Size 1.6MB
  • Sample240504-tm529sdg34
  • SHA256 06004c75186a2f0a187d10300b87540ec5bd34658841e5420b4c758e4c9ad15a
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04executionspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • looking-memphis.gl.at.ply.gg:45119

Mutex

  • 7449fc1c-3e16-4f82-9cd4-9666eca50c7a

Attributes
  • encryption_key

    41617950829C8403E84A991BFE273EF530684F0A

  • install_name

    wsappx.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    startup

  • subdirectory

    SubDir

Targets

    • Target
      Client-built.bat
    • Size 1.6MB
    • SHA256 06004c75186a2f0a187d10300b87540ec5bd34658841e5420b4c758e4c9ad15a
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04executionspywaretrojan

    • 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

    • Checks computer location settings

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

    • Executes dropped EXE

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks