Analysis

  • max time kernel
    125s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-08-2024 18:12

General

  • Target

    Nuke Loader.exe

  • Size

    3.1MB

  • MD5

    ed675e5b50992702716b65c5b15bd2ee

  • SHA1

    2463edfe3d1667933aa2676876f4ac766450ff90

  • SHA256

    c4b6a54ec0f46c8c0df7d9f5f010c10c66ec23378b4548727fbfa2b3080ebf56

  • SHA512

    7747767ebb54a2973bde62e41e823588b9bde30d3d6e7648827b224d085daaff10a65a6b71a97c58d4c53f37e1a111587fe5834ac8168779bcdb4e4e266ef44b

  • SSDEEP

    49152:3vnI22SsaNYfdPBldt698dBcjHdDRJ6tbR3LoGdkTHHB72eh2NT:3vI22SsaNYfdPBldt6+dBcjHdDRJ6/

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.51:4782

Mutex

b83cbaf1-3ce5-43f8-a42a-f845d8ef5467

Attributes
  • encryption_key

    7F14878C24A186BCD9E69BFA124C76DC41F0C9A7

  • 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 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 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\Nuke Loader.exe
    "C:\Users\Admin\AppData\Local\Temp\Nuke Loader.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3840
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:368
    • 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 FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5400
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5620

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    3.1MB

    MD5

    ed675e5b50992702716b65c5b15bd2ee

    SHA1

    2463edfe3d1667933aa2676876f4ac766450ff90

    SHA256

    c4b6a54ec0f46c8c0df7d9f5f010c10c66ec23378b4548727fbfa2b3080ebf56

    SHA512

    7747767ebb54a2973bde62e41e823588b9bde30d3d6e7648827b224d085daaff10a65a6b71a97c58d4c53f37e1a111587fe5834ac8168779bcdb4e4e266ef44b

  • memory/3840-0-0x00007FF899563000-0x00007FF899565000-memory.dmp

    Filesize

    8KB

  • memory/3840-1-0x0000000000940000-0x0000000000C64000-memory.dmp

    Filesize

    3.1MB

  • memory/3840-2-0x00007FF899560000-0x00007FF89A021000-memory.dmp

    Filesize

    10.8MB

  • memory/3840-9-0x00007FF899560000-0x00007FF89A021000-memory.dmp

    Filesize

    10.8MB

  • memory/5400-10-0x00007FF899560000-0x00007FF89A021000-memory.dmp

    Filesize

    10.8MB

  • memory/5400-11-0x00007FF899560000-0x00007FF89A021000-memory.dmp

    Filesize

    10.8MB

  • memory/5400-12-0x000000001C260000-0x000000001C2B0000-memory.dmp

    Filesize

    320KB

  • memory/5400-13-0x000000001C370000-0x000000001C422000-memory.dmp

    Filesize

    712KB

  • memory/5400-14-0x00007FF899560000-0x00007FF89A021000-memory.dmp

    Filesize

    10.8MB