Analysis

  • max time kernel
    148s
  • 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 22:55

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:1276
    • 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:3396
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /delete /tn "Windows Defender Anti-Malware Disable Startup" /f
      2⤵
        PID:5020
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\KwAG0zFFvTWu.bat" "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2260
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          3⤵
            PID:4276
          • C:\Windows\SysWOW64\PING.EXE
            ping -n 10 localhost
            3⤵
            • Runs ping.exe
            PID:4076
        • 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:4480

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\KwAG0zFFvTWu.bat

        Filesize

        262B

        MD5

        e7dbf79e696c2577d6f01f1ff81bd528

        SHA1

        54bcbd0020ad44e8742ba12d96676f158a6fe46f

        SHA256

        a4390db30166f944329bcc7567a97f77b6076e91b42353add4cfce250ce82141

        SHA512

        e266a31c4c73f06088dda5658b8b8bbb7ee0814899f3308d5a73f272b72bbc51493e5eca445e730d916b184f8e9dfa50c6d75ca9bbb706c3520a742b0a91e7a0

      • C:\Users\Admin\AppData\Roaming\Logs\06-27-~1

        Filesize

        224B

        MD5

        d8d86a1db5cf6c66133aa2b81ab2c2ad

        SHA1

        1cc50c45b4ad894c60f9ef450c0c2fad57eea0d0

        SHA256

        87d807d620068668f2a3d588c0c27cc5f7efac870f275452b4ff9c833ea38cde

        SHA512

        0bb29dbbe7c88ba68fd2515d7b2f6aa4c9c8108039fb1308cec8c58f3d3e68d9b7130b643f872361569d1ea102dd2fc24bf16ee945f154a4662b57cd31c4efd6

      • memory/1276-6-0x00000000059F0000-0x0000000005A02000-memory.dmp

        Filesize

        72KB

      • memory/1276-3-0x0000000004BA0000-0x0000000004C32000-memory.dmp

        Filesize

        584KB

      • memory/1276-4-0x0000000074690000-0x0000000074E40000-memory.dmp

        Filesize

        7.7MB

      • memory/1276-5-0x0000000004C40000-0x0000000004CA6000-memory.dmp

        Filesize

        408KB

      • memory/1276-0-0x000000007469E000-0x000000007469F000-memory.dmp

        Filesize

        4KB

      • memory/1276-7-0x0000000005F30000-0x0000000005F6C000-memory.dmp

        Filesize

        240KB

      • memory/1276-8-0x0000000006360000-0x000000000636A000-memory.dmp

        Filesize

        40KB

      • memory/1276-10-0x000000007469E000-0x000000007469F000-memory.dmp

        Filesize

        4KB

      • memory/1276-11-0x0000000074690000-0x0000000074E40000-memory.dmp

        Filesize

        7.7MB

      • memory/1276-2-0x00000000050A0000-0x0000000005644000-memory.dmp

        Filesize

        5.6MB

      • memory/1276-17-0x0000000074690000-0x0000000074E40000-memory.dmp

        Filesize

        7.7MB

      • memory/1276-1-0x0000000000120000-0x000000000018C000-memory.dmp

        Filesize

        432KB