Analysis

  • max time kernel
    143s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-04-2024 13:37

General

  • Target

    498844e96c76ce422fdb328f5deadd5e0785582cf291c1cf9d32ed15f45fa964.exe

  • Size

    348KB

  • MD5

    b12dcc0b6399196333d30649f325397f

  • SHA1

    6f208c9b6d3dae57e4c22d5e319db0d237feb909

  • SHA256

    498844e96c76ce422fdb328f5deadd5e0785582cf291c1cf9d32ed15f45fa964

  • SHA512

    f7e1cd332733a28636439775e501870b5a9d90899357ee27ed51a647c15be614bcdbcfc5acef7fc0b3085ecca2a45eb1496ec88e26cfe6e08c9b4c2bf6198146

  • SSDEEP

    6144:67qQ4i1FFiEKyK5ALbddCEaBHGdNXUnO:8plipKddGIdBUnO

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

companinuevoano1.con-ip.com:4782

Mutex

QSR_MUTEX_l1M93VuqIyiH8hEQ4I

Attributes
  • encryption_key

    rFxyS0ilcLEI1ldtBJAu

  • 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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\498844e96c76ce422fdb328f5deadd5e0785582cf291c1cf9d32ed15f45fa964.exe
    "C:\Users\Admin\AppData\Local\Temp\498844e96c76ce422fdb328f5deadd5e0785582cf291c1cf9d32ed15f45fa964.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1940
  • 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=4456 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4104

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1940-0-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/1940-1-0x0000000000F00000-0x0000000000F5E000-memory.dmp

      Filesize

      376KB

    • memory/1940-2-0x0000000006010000-0x00000000065B4000-memory.dmp

      Filesize

      5.6MB

    • memory/1940-3-0x0000000005A60000-0x0000000005AF2000-memory.dmp

      Filesize

      584KB

    • memory/1940-4-0x00000000059B0000-0x00000000059C0000-memory.dmp

      Filesize

      64KB

    • memory/1940-5-0x00000000059C0000-0x0000000005A26000-memory.dmp

      Filesize

      408KB

    • memory/1940-6-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/1940-7-0x0000000006A80000-0x0000000006A92000-memory.dmp

      Filesize

      72KB

    • memory/1940-8-0x00000000059B0000-0x00000000059C0000-memory.dmp

      Filesize

      64KB

    • memory/1940-9-0x0000000006EC0000-0x0000000006EFC000-memory.dmp

      Filesize

      240KB

    • memory/1940-10-0x00000000071B0000-0x00000000071BA000-memory.dmp

      Filesize

      40KB