Overview

overview

10

Static

static

10

buildet.exe

windows10-2004-x64

10

buildet.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    buildet.exe
  • Size 3.1MB
  • Sample261029-hs2fgsa16l
  • SHA256 3770d87bec40bb0c2e382b8b87e64ca7cf7e8e355451ff9e0c45a1de3eb605ef
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04discoveryexecutionpersistencespywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • 2.tcp.eu.ngrok.io:26430

  • 5.tcp.eu.ngrok.io:21383

  • 5.tcp.eu.ngrok.io:18409

  • expressing-product.tun.ply.gg:18891

  • 2ybz0esa.free.tryportwarp.cc::16268

Mutex

  • 697403f2-515b-4438-aea2-8a5e62f07697

Attributes
  • encryption_key

    28F9DE2842B51C675BB32A7C662F971EAC0B5A17

  • install_name

    MicrosoftUpdater.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    1000

  • startup_key

    MicrosoftUpdater

  • subdirectory

    Microsoft

Targets

    • Target
      buildet.exe
    • Size 3.1MB
    • SHA256 3770d87bec40bb0c2e382b8b87e64ca7cf7e8e355451ff9e0c45a1de3eb605ef
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04discoveryexecutionquasarpersistencespywaretrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks