Analysis

  • max time kernel
    156s
  • max time network
    176s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-06-2024 22:53

General

  • Target

    Rat remove.exe

  • Size

    409KB

  • MD5

    4a9a21634ca5574ce01fa7bac0950d54

  • SHA1

    c29eb629cbe62c7828f16c5ad6b29ba015eb7b69

  • SHA256

    a003924092f4eed3281ccd3f82d95548a809a09436ee07b01b6d738a7c1f809d

  • SHA512

    e82f2df2f40cf8d51a85c2ee4e3fe78ff739b1581688b5107cbd8bec53a1d351ef3c16fdf4e709ad7f47afa55e5bcc4ed8de224e587f4dd873e0486b08e7325e

  • SSDEEP

    12288:YpiREGJFK6Fcbpdw5sI68ulIPPMQE1SQ:AwpJsb34ZPPsH

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen

C2

147.185.221.20:47638

Mutex

$Sxr-GV6wZsGZZMeZ3qfenc

Attributes
  • encryption_key

    hwFlXMrCGoyqiQGmMvlX

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Defender Anti-Malware Disable Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Adds Run key to start application 2 TTPs 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.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Rat remove.exe
    "C:\Users\Admin\AppData\Local\Temp\Rat remove.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3248
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Windows Defender Anti-Malware Disable Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Rat remove.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4508
  • 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=4092 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1696

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/3248-0-0x000000007486E000-0x000000007486F000-memory.dmp

      Filesize

      4KB

    • memory/3248-1-0x0000000000F40000-0x0000000000FAC000-memory.dmp

      Filesize

      432KB

    • memory/3248-2-0x000000007486E000-0x000000007486F000-memory.dmp

      Filesize

      4KB

    • memory/3248-3-0x0000000005F40000-0x00000000064E4000-memory.dmp

      Filesize

      5.6MB

    • memory/3248-4-0x0000000001860000-0x00000000018F2000-memory.dmp

      Filesize

      584KB

    • memory/3248-5-0x0000000074860000-0x0000000075010000-memory.dmp

      Filesize

      7.7MB

    • memory/3248-6-0x0000000001900000-0x0000000001966000-memory.dmp

      Filesize

      408KB

    • memory/3248-7-0x0000000074860000-0x0000000075010000-memory.dmp

      Filesize

      7.7MB

    • memory/3248-8-0x0000000005ED0000-0x0000000005EE2000-memory.dmp

      Filesize

      72KB

    • memory/3248-9-0x0000000006AD0000-0x0000000006B0C000-memory.dmp

      Filesize

      240KB

    • memory/3248-10-0x00000000075E0000-0x00000000075EA000-memory.dmp

      Filesize

      40KB