Analysis

  • max time kernel
    150s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    01-01-2025 20:00

General

  • Target

    1250343116e00d7d7125b738253aeba67e40f0f9ab649bc6a4161580f824819b.exe

  • Size

    3.1MB

  • MD5

    3c7bf1e80abf4d7d6dc60e207425f519

  • SHA1

    9c65bc3a1688b64032ba3ef8cb5676cacfa34759

  • SHA256

    1250343116e00d7d7125b738253aeba67e40f0f9ab649bc6a4161580f824819b

  • SHA512

    a6d7e20fa6340e18470442a10a84e79442185c2e26939e6742cb7bc5f08acec27a50172a47b4cf2f8cce816cade61a60f127430cd8f25174bb98885b67f30663

  • SSDEEP

    49152:CvDI22SsaNYfdPBldt698dBcjHZu/kBxnLoGdhTHHB72eh2NT:Cv822SsaNYfdPBldt6+dBcjHk/g

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.176:4782

Mutex

8ac8cfe4-abbd-4c20-8ef9-30391cf64a5b

Attributes
  • encryption_key

    B236022E1D7BEC08D8EF90B6C25D471BFC7F95CB

  • 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 family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1250343116e00d7d7125b738253aeba67e40f0f9ab649bc6a4161580f824819b.exe
    "C:\Users\Admin\AppData\Local\Temp\1250343116e00d7d7125b738253aeba67e40f0f9ab649bc6a4161580f824819b.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2196
    • 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
      PID:2320

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

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

    Filesize

    3.1MB

    MD5

    3c7bf1e80abf4d7d6dc60e207425f519

    SHA1

    9c65bc3a1688b64032ba3ef8cb5676cacfa34759

    SHA256

    1250343116e00d7d7125b738253aeba67e40f0f9ab649bc6a4161580f824819b

    SHA512

    a6d7e20fa6340e18470442a10a84e79442185c2e26939e6742cb7bc5f08acec27a50172a47b4cf2f8cce816cade61a60f127430cd8f25174bb98885b67f30663

  • memory/2196-0-0x000007FEF5493000-0x000007FEF5494000-memory.dmp

    Filesize

    4KB

  • memory/2196-1-0x00000000000E0000-0x0000000000404000-memory.dmp

    Filesize

    3.1MB

  • memory/2196-2-0x000007FEF5490000-0x000007FEF5E7C000-memory.dmp

    Filesize

    9.9MB

  • memory/2196-8-0x000007FEF5490000-0x000007FEF5E7C000-memory.dmp

    Filesize

    9.9MB

  • memory/2320-10-0x000007FEF5490000-0x000007FEF5E7C000-memory.dmp

    Filesize

    9.9MB

  • memory/2320-9-0x0000000001300000-0x0000000001624000-memory.dmp

    Filesize

    3.1MB

  • memory/2320-11-0x000007FEF5490000-0x000007FEF5E7C000-memory.dmp

    Filesize

    9.9MB

  • memory/2320-12-0x000007FEF5490000-0x000007FEF5E7C000-memory.dmp

    Filesize

    9.9MB