Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/01/2024, 22:29

General

  • Target
    client.exe
  • Size 502KB
  • Sample240119-2d8qssfce5
  • SHA256 a24dafb52de61a6bb3d363afb0d02ac3311d4a4f221b20f246c2fa2d5cb352fd
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.0

Botnet
  • Office04

C2
  • 192.168.85.129:4782

Mutex
  • 82ad0bdc-5c1a-4fe8-900c-9f724925049c

Attributes
  • encryption_key

    4111EB4E3452F3046C6F5DFE90F84F08D3E1BB9C

  • 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 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.exe
    "C:\Users\Admin\AppData\Local\Temp\client.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:2792

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/2792-0-0x00000000007F0000-0x0000000000874000-memory.dmp

        memory/2792-1-0x00007FFB6ADC0000-0x00007FFB6B881000-memory.dmp

        memory/2792-2-0x00000000028E0000-0x00000000028F0000-memory.dmp

        memory/2792-3-0x000000001BD70000-0x000000001BDC0000-memory.dmp

        memory/2792-4-0x000000001BE80000-0x000000001BF32000-memory.dmp

        memory/2792-5-0x00007FFB6ADC0000-0x00007FFB6B881000-memory.dmp

        memory/2792-6-0x00000000028E0000-0x00000000028F0000-memory.dmp