Overview

overview

10

Static

static

10

Client-built.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    Client-built.exe
  • Size 3.1MB
  • Sample250610-nh6v4styb1
  • SHA256 765b96a07e791c6be3db118f5d66700363732345c8779eff2f4215665aa34cbb
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasartriagediscoveryspywarestealertrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Triage

C2

  • zzylos.ddns.net:4782

Mutex

  • 6fcb5d6b-1a48-4c1a-b711-e46c41b99077

Attributes
  • encryption_key

    C20EF67E525BAC68B3EAEBFE43DF8DF151CC84AA

  • install_name

    windowsupdate.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    update_history

  • reconnect_delay

    3000

  • startup_key

    Windows Update Service

  • subdirectory

    WsS

Targets

    • Target
      Client-built.exe
    • Size 3.1MB
    • SHA256 765b96a07e791c6be3db118f5d66700363732345c8779eff2f4215665aa34cbb
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasartriagediscoveryspywarestealertrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar family

      quasar

    • Quasar payload

    • Executes dropped EXE

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

      spywarestealer

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer
    behavioral1

MITRE ATT&CK Enterprise v16

Tasks