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

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General

  • Target
    Client-built.exe
  • Size 348KB
  • Sample240602-wrdjxsbb73
  • SHA256 45259ac5a1fd635f5b2a41492f4156cc8476afd8e8764a9d61d3158599a75fd8
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasarclientspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.3.0.0

Botnet

  • Client

C2

  • runderscore00-61208.portmap.host:61208

Mutex

  • QSR_MUTEX_UyCo16EyzQLUNZiVH0

Attributes
  • encryption_key

    AaATXyVYZ9AKtrWxhyCz

  • install_name

    Client.exe

  • log_directory

    Keylogs

  • reconnect_delay

    3000

  • startup_key

    Powershell

  • subdirectory

    SubDir

Targets

    • Target
      Client-built.exe
    • Size 348KB
    • SHA256 45259ac5a1fd635f5b2a41492f4156cc8476afd8e8764a9d61d3158599a75fd8
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasarclientspywaretrojan

    • 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