Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-06-2024 22:59

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
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Looks up external IP address via web service 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 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 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Rat remove.exe
    "C:\Users\Admin\AppData\Local\Temp\Rat remove.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:5004
    • 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:740
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /delete /tn "Windows Defender Anti-Malware Disable Startup" /f
      2⤵
        PID:3492
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\KCD6eaFyephK.bat" "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4080
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          3⤵
            PID:4824
          • C:\Windows\SysWOW64\PING.EXE
            ping -n 10 localhost
            3⤵
            • Runs ping.exe
            PID:2756
        • C:\Windows\SysWOW64\SCHTASKS.exe
          "SCHTASKS.exe" /create /tn "$77Rat remove.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\Rat remove.exe'" /sc onlogon /rl HIGHEST
          2⤵
          • Scheduled Task/Job: Scheduled Task
          PID:4136

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\KCD6eaFyephK.bat

        Filesize

        262B

        MD5

        f1bd35827fbb8eb1d811e4f220a0fab7

        SHA1

        5f8da21f02f50db692ed4aeef8902d15be6759c5

        SHA256

        44e55090488a6aac5b6f1d6cbe3ea0b5ab62df7989411f83a8c79414fbcdd7e2

        SHA512

        4ad8e10ff454d5bc65085876c93311c0824e43ebbad169af4469820944758e3947999f84a72d42c4e529fba313f6712073358425d98e129e1d47b594b561c951

      • memory/5004-6-0x0000000005CC0000-0x0000000005CD2000-memory.dmp

        Filesize

        72KB

      • memory/5004-2-0x00000000053F0000-0x0000000005994000-memory.dmp

        Filesize

        5.6MB

      • memory/5004-3-0x0000000004E40000-0x0000000004ED2000-memory.dmp

        Filesize

        584KB

      • memory/5004-4-0x00000000751D0000-0x0000000075980000-memory.dmp

        Filesize

        7.7MB

      • memory/5004-5-0x0000000004F70000-0x0000000004FD6000-memory.dmp

        Filesize

        408KB

      • memory/5004-0-0x00000000751DE000-0x00000000751DF000-memory.dmp

        Filesize

        4KB

      • memory/5004-7-0x0000000006200000-0x000000000623C000-memory.dmp

        Filesize

        240KB

      • memory/5004-8-0x0000000006630000-0x000000000663A000-memory.dmp

        Filesize

        40KB

      • memory/5004-10-0x00000000751DE000-0x00000000751DF000-memory.dmp

        Filesize

        4KB

      • memory/5004-11-0x00000000751D0000-0x0000000075980000-memory.dmp

        Filesize

        7.7MB

      • memory/5004-1-0x00000000003F0000-0x000000000045C000-memory.dmp

        Filesize

        432KB

      • memory/5004-17-0x00000000751D0000-0x0000000075980000-memory.dmp

        Filesize

        7.7MB