Analysis

  • max time kernel
    62s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-04-2023 08:42

General

  • Target

    Pekao_Potwierdzenie przelewu platnosci_PL3000065000342790.exe

  • Size

    1.4MB

  • MD5

    ebbf1477570f9b7acccac1946a9a2099

  • SHA1

    21b54ad89f6c5fcba305a586efc746b4f32bf1c3

  • SHA256

    b4d144db0a51b75fec768e08ec6500afd3b085c0a9dd9b22926845536ec2a50d

  • SHA512

    108db6d635c07c61222813518168216eef7b5669afed0cf65485bc28d72de92bb55258b032e3cbca474ce790cf0884c3d6689e17c2b744448fa840a9f613e26c

  • SSDEEP

    24576:QzhCv4xm8E+fEc6tkt2SAaQ5/m9Qr/aZLkaf1mPqGyHvzU+XowdTH:QzZwaQ5/bx/+rXo4

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

top.never01abuse.xyz:4186

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmcoss-AS3COA

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • ModiLoader Second Stage 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Pekao_Potwierdzenie przelewu platnosci_PL3000065000342790.exe
    "C:\Users\Admin\AppData\Local\Temp\Pekao_Potwierdzenie przelewu platnosci_PL3000065000342790.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4632
    • C:\Windows\SysWOW64\wscript.exe
      C:\Windows\System32\wscript.exe
      2⤵
        PID:3624
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3624 -s 848
          3⤵
          • Program crash
          PID:752
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3624 -ip 3624
      1⤵
        PID:3044

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/3624-140-0x0000000000810000-0x0000000000811000-memory.dmp

        Filesize

        4KB

      • memory/3624-141-0x0000000002330000-0x0000000002331000-memory.dmp

        Filesize

        4KB

      • memory/3624-146-0x0000000002390000-0x0000000002391000-memory.dmp

        Filesize

        4KB

      • memory/3624-148-0x0000000010590000-0x000000001064F000-memory.dmp

        Filesize

        764KB

      • memory/3624-149-0x00000000036E0000-0x000000000375C000-memory.dmp

        Filesize

        496KB

      • memory/4632-133-0x0000000002310000-0x0000000002311000-memory.dmp

        Filesize

        4KB

      • memory/4632-134-0x00000000046B0000-0x0000000004797000-memory.dmp

        Filesize

        924KB

      • memory/4632-136-0x0000000000400000-0x0000000000572000-memory.dmp

        Filesize

        1.4MB

      • memory/4632-139-0x0000000010590000-0x000000001064F000-memory.dmp

        Filesize

        764KB

      • memory/4632-145-0x0000000010590000-0x000000001064F000-memory.dmp

        Filesize

        764KB