Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-04-2024 14:29

General

  • Target

    asdasd.exe

  • Size

    3.1MB

  • MD5

    30fdc0a0d22cca3c0b971c7928ca0e82

  • SHA1

    517211383e5022bec91b521955832a69417f4042

  • SHA256

    39f626850f3dbd66ff5b75f99cd531cf74e4418338ddd45d0ae20fb7ceda2b6f

  • SHA512

    dcd9ae5e6ce11c93826b2d7b4d9acd201ac53cd41f20d815b308d2f3fd938b3774ea6d64f9f13ce159238ddbead7e8e126d514fe85af0da11d416de94415b404

  • SSDEEP

    49152:Dv7I22SsaNYfdPBldt698dBcjHn8RJ61bR3LoGdFZTHHB72eh2NT:DvE22SsaNYfdPBldt6+dBcjHn8RJ6H

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

193.161.193.99:1194

192.168.254.152:1194

Mutex

37c3d2aa-6a36-4ee8-a4be-f1c3187fbd03

Attributes
  • encryption_key

    E9EE5B51F341491A9CE8837BE89BB18191B86C1E

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    python

  • 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).

  • Creates scheduled task(s) 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\asdasd.exe
    "C:\Users\Admin\AppData\Local\Temp\asdasd.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4452
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "python" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:1244
    • 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:4392
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "python" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2132

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

    30fdc0a0d22cca3c0b971c7928ca0e82

    SHA1

    517211383e5022bec91b521955832a69417f4042

    SHA256

    39f626850f3dbd66ff5b75f99cd531cf74e4418338ddd45d0ae20fb7ceda2b6f

    SHA512

    dcd9ae5e6ce11c93826b2d7b4d9acd201ac53cd41f20d815b308d2f3fd938b3774ea6d64f9f13ce159238ddbead7e8e126d514fe85af0da11d416de94415b404

  • memory/4392-10-0x00007FFA27F50000-0x00007FFA28A11000-memory.dmp

    Filesize

    10.8MB

  • memory/4392-11-0x000000001BC00000-0x000000001BC10000-memory.dmp

    Filesize

    64KB

  • memory/4392-12-0x000000001C830000-0x000000001C880000-memory.dmp

    Filesize

    320KB

  • memory/4392-13-0x000000001C940000-0x000000001C9F2000-memory.dmp

    Filesize

    712KB

  • memory/4392-14-0x00007FFA27F50000-0x00007FFA28A11000-memory.dmp

    Filesize

    10.8MB

  • memory/4452-0-0x0000000000A50000-0x0000000000D74000-memory.dmp

    Filesize

    3.1MB

  • memory/4452-1-0x00007FFA27F50000-0x00007FFA28A11000-memory.dmp

    Filesize

    10.8MB

  • memory/4452-2-0x0000000002F40000-0x0000000002F50000-memory.dmp

    Filesize

    64KB

  • memory/4452-9-0x00007FFA27F50000-0x00007FFA28A11000-memory.dmp

    Filesize

    10.8MB