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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250129-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/01/2025, 07:56

General

  • Target

    3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe

  • Size

    3.1MB

  • MD5

    fbb44da2d0860af30fc45116529832df

  • SHA1

    44377732b9959172cdb261d366069801adafd52a

  • SHA256

    3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31

  • SHA512

    b1cdda7f3b67f1bedfbf896a4e7e8af0d12aa78a8709604d1262cc68ff0b0bdb3a326e7325075210f4d4e22e43fd7a7fa4bfbc90fc4c032bc3f3304f79157909

  • SSDEEP

    49152:Pvyt62XlaSFNWPjljiFa2RoUYIonF7KoGd1GKuTHHB72eh2NT:Pva62XlaSFNWPjljiFXRoUYIonFW

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svhost32

C2

87.228.57.81:4782

Mutex

47b71fc0-b2c4-4112-b97a-39385a5399c1

Attributes
  • encryption_key

    19A0FAF8459F69650B5965C225752D425C429EEC

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svhost32

  • 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\3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
    "C:\Users\Admin\AppData\Local\Temp\3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4784
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "svhost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2972
    • 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:3832
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "svhost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3824

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

    fbb44da2d0860af30fc45116529832df

    SHA1

    44377732b9959172cdb261d366069801adafd52a

    SHA256

    3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31

    SHA512

    b1cdda7f3b67f1bedfbf896a4e7e8af0d12aa78a8709604d1262cc68ff0b0bdb3a326e7325075210f4d4e22e43fd7a7fa4bfbc90fc4c032bc3f3304f79157909

  • memory/3832-10-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

    Filesize

    10.8MB

  • memory/3832-11-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

    Filesize

    10.8MB

  • memory/3832-12-0x000000001B580000-0x000000001B5D0000-memory.dmp

    Filesize

    320KB

  • memory/3832-13-0x000000001BEE0000-0x000000001BF92000-memory.dmp

    Filesize

    712KB

  • memory/3832-14-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

    Filesize

    10.8MB

  • memory/4784-0-0x00007FFCAD173000-0x00007FFCAD175000-memory.dmp

    Filesize

    8KB

  • memory/4784-1-0x0000000000380000-0x00000000006A4000-memory.dmp

    Filesize

    3.1MB

  • memory/4784-2-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

    Filesize

    10.8MB

  • memory/4784-9-0x00007FFCAD170000-0x00007FFCADC31000-memory.dmp

    Filesize

    10.8MB