Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/01/2024, 08:36

General

  • Target
    Client.exe
  • Size 3.1MB
  • Sample240122-khkfbscfg6
  • SHA256 ca3a409333d884580e6ccf5ba616ab5d27dee98e0b991c8e416fa25e9f9dc54e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • 127.0.0.1:4782

Mutex
  • 9a6c439e-9527-4dbf-8b54-9f7e0f664e7f

Attributes
  • encryption_key

    924B96B041584FB2DFB676E3FF61D8EF44C7CA2D

  • 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:1564

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/1564-0-0x0000000000A50000-0x0000000000D74000-memory.dmp

        memory/1564-1-0x00007FFC37D90000-0x00007FFC38851000-memory.dmp

        memory/1564-2-0x0000000002E50000-0x0000000002E60000-memory.dmp

        memory/1564-3-0x000000001C470000-0x000000001C4C0000-memory.dmp

        memory/1564-4-0x000000001C580000-0x000000001C632000-memory.dmp

        memory/1564-5-0x00007FFC37D90000-0x00007FFC38851000-memory.dmp

        memory/1564-6-0x0000000002E50000-0x0000000002E60000-memory.dmp