Analysis

  • max time kernel
    126s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-12-2024 14:17

General

  • Target

    e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe

  • Size

    3.1MB

  • MD5

    6a0bb84dcd837e83638f4292180bf5ab

  • SHA1

    20e31ccffe1ac806e75ea839ea90b4c91e4322c5

  • SHA256

    e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

  • SHA512

    d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5

  • SSDEEP

    49152:Ovkt62XlaSFNWPjljiFa2RoUYIUOzML6oGd4y/THHB72eh2NT:Ov462XlaSFNWPjljiFXRoUYIpzMG

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.43.241:4782

Mutex

0517af80-95f0-4a6d-a904-5b7ee8faa157

Attributes
  • encryption_key

    6095BF6D5D58D02597F98370DFD1CCEB782F1EDD

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svhost

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe
    "C:\Users\Admin\AppData\Local\Temp\e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:628
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2364
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3980
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2236

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

    Filesize

    3.1MB

    MD5

    6a0bb84dcd837e83638f4292180bf5ab

    SHA1

    20e31ccffe1ac806e75ea839ea90b4c91e4322c5

    SHA256

    e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

    SHA512

    d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5

  • memory/628-0-0x00007FFEF09F3000-0x00007FFEF09F5000-memory.dmp

    Filesize

    8KB

  • memory/628-1-0x0000000000C50000-0x0000000000F74000-memory.dmp

    Filesize

    3.1MB

  • memory/628-2-0x00007FFEF09F0000-0x00007FFEF14B1000-memory.dmp

    Filesize

    10.8MB

  • memory/628-10-0x00007FFEF09F0000-0x00007FFEF14B1000-memory.dmp

    Filesize

    10.8MB

  • memory/3980-9-0x00007FFEF09F0000-0x00007FFEF14B1000-memory.dmp

    Filesize

    10.8MB

  • memory/3980-11-0x00007FFEF09F0000-0x00007FFEF14B1000-memory.dmp

    Filesize

    10.8MB

  • memory/3980-12-0x000000001BEB0000-0x000000001BF00000-memory.dmp

    Filesize

    320KB

  • memory/3980-13-0x000000001C7F0000-0x000000001C8A2000-memory.dmp

    Filesize

    712KB

  • memory/3980-14-0x00007FFEF09F0000-0x00007FFEF14B1000-memory.dmp

    Filesize

    10.8MB