Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-04-2024 10:42

General

  • Target

    ratXD.exe

  • Size

    3.1MB

  • MD5

    9c5f2f586e52a975593d11710685f846

  • SHA1

    887006a6849b22cfbf85871e50ab33404097f654

  • SHA256

    9259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2

  • SHA512

    c3fb61664de1248713b7c1a98d17b344a68d6a676841f174659565e043ec6aecc0c27bd4a47d815e0d19fd070054ff2ca57fb304878b284162a5b9142c2b38bf

  • SSDEEP

    49152:avCI22SsaNYfdPBldt698dBcjHBY5VBxFUoGdD9THHB72eh2NT:avP22SsaNYfdPBldt6+dBcjHBY5c

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

177.72.82.9:5678

Mutex

62a700ff-4fdb-4af6-b871-ab8a290f0701

Attributes
  • encryption_key

    E0A41577673498A6E2FD27CB9AED2F6B83527072

  • 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 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ratXD.exe
    "C:\Users\Admin\AppData\Local\Temp\ratXD.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2160
    • C:\Windows\system32\SubDir\Client.exe
      "C:\Windows\system32\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:4688
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3532 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:956

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Windows\system32\SubDir\Client.exe

      Filesize

      3.1MB

      MD5

      9c5f2f586e52a975593d11710685f846

      SHA1

      887006a6849b22cfbf85871e50ab33404097f654

      SHA256

      9259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2

      SHA512

      c3fb61664de1248713b7c1a98d17b344a68d6a676841f174659565e043ec6aecc0c27bd4a47d815e0d19fd070054ff2ca57fb304878b284162a5b9142c2b38bf

    • memory/2160-0-0x0000000000850000-0x0000000000B74000-memory.dmp

      Filesize

      3.1MB

    • memory/2160-1-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp

      Filesize

      10.8MB

    • memory/2160-2-0x000000001B770000-0x000000001B780000-memory.dmp

      Filesize

      64KB

    • memory/2160-12-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp

      Filesize

      10.8MB

    • memory/4688-9-0x00000000025A0000-0x00000000025B0000-memory.dmp

      Filesize

      64KB

    • memory/4688-8-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp

      Filesize

      10.8MB

    • memory/4688-10-0x000000001BBC0000-0x000000001BC10000-memory.dmp

      Filesize

      320KB

    • memory/4688-11-0x000000001BCD0000-0x000000001BD82000-memory.dmp

      Filesize

      712KB

    • memory/4688-13-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp

      Filesize

      10.8MB

    • memory/4688-14-0x00000000025A0000-0x00000000025B0000-memory.dmp

      Filesize

      64KB