Analysis

  • max time kernel
    140s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-04-2024 16:52

General

  • Target

    xRmat80DlHcR.exe

  • Size

    348KB

  • MD5

    32f3cadcabd40f0b821adba034ac8fb1

  • SHA1

    75ec24a7b088756120b9c380c6a13d88dbab5bd6

  • SHA256

    a681774e83e773eff9e6c4070a78b7fdb2839301ce1955cade51bd95af25abd3

  • SHA512

    a59aae78bf7729881925fdea3f0c2370a26f3bc3ea665df3eca1278c3599d37369aaf1e5c3bc5dcf08acb02a80ba1e1f4883b855ce934908a95d1d3d4c448c40

  • SSDEEP

    6144:TzNHXf500Mb31d61sQqboCixEkZeg5kEvfmG:Hd50vd0IixDp1vfmG

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

ppprosyl.con-ip.com:4001

Mutex

QSR_MUTEX_l1M93VuqIyiH8hEQ4I

Attributes
  • encryption_key

    ucnCWAxHFqrqDWqAvywj

  • 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\xRmat80DlHcR.exe
    "C:\Users\Admin\AppData\Local\Temp\xRmat80DlHcR.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1036
  • 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=4080 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1712

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1036-0-0x0000000074C20000-0x00000000753D0000-memory.dmp

      Filesize

      7.7MB

    • memory/1036-1-0x00000000001C0000-0x000000000021E000-memory.dmp

      Filesize

      376KB

    • memory/1036-2-0x0000000005180000-0x0000000005724000-memory.dmp

      Filesize

      5.6MB

    • memory/1036-3-0x0000000004CB0000-0x0000000004D42000-memory.dmp

      Filesize

      584KB

    • memory/1036-4-0x0000000004CA0000-0x0000000004CB0000-memory.dmp

      Filesize

      64KB

    • memory/1036-5-0x0000000004E50000-0x0000000004EB6000-memory.dmp

      Filesize

      408KB

    • memory/1036-6-0x0000000074C20000-0x00000000753D0000-memory.dmp

      Filesize

      7.7MB

    • memory/1036-7-0x0000000005B30000-0x0000000005B42000-memory.dmp

      Filesize

      72KB

    • memory/1036-8-0x0000000005F70000-0x0000000005FAC000-memory.dmp

      Filesize

      240KB

    • memory/1036-9-0x0000000004CA0000-0x0000000004CB0000-memory.dmp

      Filesize

      64KB

    • memory/1036-10-0x0000000006260000-0x000000000626A000-memory.dmp

      Filesize

      40KB