Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240611-en
  • resource tags

    arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29-06-2024 19:08

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    6008a46eb8c69c7d6f65886d3e67c93d

  • SHA1

    eaea51712b1462431f0afa92f18484cd2e5fc94c

  • SHA256

    3dfe010c8df45dbddb6707085c2d3c686288312bae8015a3a639a505cd6d7ba6

  • SHA512

    37f8840dc4790394a7aa02c2ecdd5caa097d653133850d3cae89b50020f861ec9866b840d3d8696cd6b1be6797e67de533579f86c037f0bdc588c53da8d7f5d9

  • SSDEEP

    49152:PvnI22SsaNYfdPBldt698dBcjH18cmbmz1qoGddOTHHB72eh2NT:PvI22SsaNYfdPBldt6+dBcjHucmrt

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

zzzz

C2

8.tcp.ngrok.io:13597

Mutex

116e2822-047d-4b5c-ad10-563148a1a28e

Attributes
  • encryption_key

    C366BC97216329D1909524412E3ECB1EBC575D07

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4604
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ORoukgUd9aj4.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:880
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:3700
        • C:\Windows\system32\PING.EXE
          ping -n 10 localhost
          3⤵
          • Runs ping.exe
          PID:3848

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\ORoukgUd9aj4.bat

      Filesize

      213B

      MD5

      5e37f1653168f5691d4ec309ca5eafb3

      SHA1

      3d923f63c3f2154143a77cc9395fe9ca0e400632

      SHA256

      8a546d9af6411de48b28e75bed475a064436ccd0e53875ca29b70d6e780fd5b2

      SHA512

      9444c826e251c36199bb22f347c287f37bd9904f42ad0c7d6e5dedc590c4438229fd24f8960088049d9c7daa6e66a91a3b47ac93d2167ca1ab625efade316f1c

    • memory/4604-0-0x00007FFC0E963000-0x00007FFC0E965000-memory.dmp

      Filesize

      8KB

    • memory/4604-1-0x0000000000180000-0x00000000004A4000-memory.dmp

      Filesize

      3.1MB

    • memory/4604-2-0x00007FFC0E960000-0x00007FFC0F422000-memory.dmp

      Filesize

      10.8MB

    • memory/4604-3-0x000000001B1B0000-0x000000001B200000-memory.dmp

      Filesize

      320KB

    • memory/4604-4-0x000000001B6C0000-0x000000001B772000-memory.dmp

      Filesize

      712KB

    • memory/4604-7-0x000000001B650000-0x000000001B662000-memory.dmp

      Filesize

      72KB

    • memory/4604-8-0x000000001C4D0000-0x000000001C50C000-memory.dmp

      Filesize

      240KB

    • memory/4604-9-0x00007FFC0E963000-0x00007FFC0E965000-memory.dmp

      Filesize

      8KB

    • memory/4604-10-0x00007FFC0E960000-0x00007FFC0F422000-memory.dmp

      Filesize

      10.8MB

    • memory/4604-16-0x00007FFC0E960000-0x00007FFC0F422000-memory.dmp

      Filesize

      10.8MB