Overview

overview

10

Static

static

10

Bulit.exe

windows10-2004-x64

10

Bulit.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    Bulit.exe
  • Size 2.6MB
  • Sample260704-tprbwsdw3q
  • SHA256 3dabe3719912aafddf49ddd7d00e3824d2f37d6d94fd81c5cb4c95736a7dc0cc
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04discoveryexecutionpersistencespywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.6.6

Botnet

  • Office04

C2

  • maria-interruption.with.playit.plus:1788

Mutex

  • af2c6f00-df3c-48d8-a841-fe604bd57ba9

Attributes
  • encryption_key

    7799F230382DEC15CFC54F1D560B5A8B875621D2

  • install_name

    System Update 3.3.exe

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • reconnect_delay

    3000

  • startup_key

    System Update 3.3

  • subdirectory

    System Update 3.3

Targets

    • Target
      Bulit.exe
    • Size 2.6MB
    • SHA256 3dabe3719912aafddf49ddd7d00e3824d2f37d6d94fd81c5cb4c95736a7dc0cc
    • 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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks