Analysis

  • max time kernel
    129s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    03-12-2023 10:41

General

  • Target

    425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe

  • Size

    3.2MB

  • MD5

    58abd80cc431895f2c2126f714ca3c8c

  • SHA1

    9338c3bbe9e6dd3658848c03a5d3bcf02dfbe965

  • SHA256

    425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff

  • SHA512

    fcd8197173da2c475451f500cbea32b446d872a8553ebd76dae4ac3873ed8da149e8036cad65968f10d6719992e442e0ddfb458ce250c41521668d5117a14ec4

  • SSDEEP

    49152:S9GUKQbhUbLP/WdzmmVoNyQNKXVTHUt0ONKgDGsbolFjeTXbjuOvtXcUwowyr4T5:yUbLPudCfUj0t0ON/GUW6lJ3HdjX0

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

y20.ddns.net:5552

Mutex

081f9344-bbf0-4c0d-832c-1597fc2c5291

Attributes
  • encryption_key

    51E85A39CEAF3ACB23D073483E360B1A632697B4

  • 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 5 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
    "C:\Users\Admin\AppData\Local\Temp\425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2356
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '' -Value '"C:\Users\Admin\AppData\Roaming\.exe"' -PropertyType 'String'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2176
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      #cmd
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:828

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/828-14-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/828-6-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/828-17-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/828-19-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/828-8-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/828-10-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/828-11-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/828-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2176-21-0x00000000710A0000-0x000000007164B000-memory.dmp

    Filesize

    5.7MB

  • memory/2176-25-0x00000000710A0000-0x000000007164B000-memory.dmp

    Filesize

    5.7MB

  • memory/2176-20-0x00000000710A0000-0x000000007164B000-memory.dmp

    Filesize

    5.7MB

  • memory/2176-23-0x0000000002840000-0x0000000002880000-memory.dmp

    Filesize

    256KB

  • memory/2176-24-0x0000000002840000-0x0000000002880000-memory.dmp

    Filesize

    256KB

  • memory/2176-22-0x0000000002840000-0x0000000002880000-memory.dmp

    Filesize

    256KB

  • memory/2356-3-0x0000000004DF0000-0x0000000004E30000-memory.dmp

    Filesize

    256KB

  • memory/2356-16-0x0000000074D90000-0x000000007547E000-memory.dmp

    Filesize

    6.9MB

  • memory/2356-1-0x0000000074D90000-0x000000007547E000-memory.dmp

    Filesize

    6.9MB

  • memory/2356-0-0x00000000002C0000-0x00000000005EE000-memory.dmp

    Filesize

    3.2MB