Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    25/07/2026, 00:23

General

  • Target
    Client-built.exe
  • Size 3.1MB
  • Sample260725-apwf3afa96
  • SHA256 b8d565ca8bb20cd435732cf0d0e6a327230dd3820deccedbc75b5a44e252e929
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • 94.158.245.53:9992

Mutex
  • 4abbc77f-27e2-4983-8fe9-6fafbfb7627b

Attributes
  • encryption_key

    F5CCD6560C6A9C857BE240A8EE0DF9CF88BC3B2B

  • install_name

    Client.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Family: Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:4988

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/4988-0-0x00007FFC242BF000-0x00007FFC242C0000-memory.dmp

        memory/4988-1-0x0000000000C70000-0x0000000000F94000-memory.dmp

        memory/4988-2-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-3-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-4-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-5-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-6-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-7-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-8-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-9-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-10-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-11-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-12-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-13-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-14-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp

        memory/4988-15-0x000000001D370000-0x000000001D3C0000-memory.dmp

        memory/4988-16-0x000000001D480000-0x000000001D532000-memory.dmp

        memory/4988-17-0x00007FFC24130000-0x00007FFC24AD4000-memory.dmp