Analysis

  • max time kernel
    150s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-12-2024 10:23

General

  • Target

    RMX.exe

  • Size

    469KB

  • MD5

    87d7fffd5ec9e7bc817d31ce77dee415

  • SHA1

    6cc44ccc0438c65cdef248cc6d76fc0d05e79222

  • SHA256

    47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628

  • SHA512

    1d2c6ec8676cb1cfbe37f808440287ea6a658d3f21829b5001c3c08a663722eb0537cc681a6faa7d39dc16a101fa2bbf55989a64a7c16143f11aa96033b886a5

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSAn9:uiLJbpI7I2WhQqZ7A9

Malware Config

Extracted

Family

remcos

Botnet

RMX

C2

154.216.18.132:6868

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

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-8G0TND

  • 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

  • Remcos

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

  • Remcos family
  • UAC bypass 3 TTPs 3 IoCs
  • Adds policy Run key to start application 2 TTPs 6 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RMX.exe
    "C:\Users\Admin\AppData\Local\Temp\RMX.exe"
    1⤵
    • Adds policy Run key to start application
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4812
    • C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2100
      • C:\Windows\SysWOW64\reg.exe
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        3⤵
        • UAC bypass
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:4612
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3128
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3612
        • C:\ProgramData\Remcos\remcos.exe
          C:\ProgramData\Remcos\remcos.exe
          4⤵
          • Adds policy Run key to start application
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:912
          • C:\Windows\SysWOW64\cmd.exe
            /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:2512
            • C:\Windows\SysWOW64\reg.exe
              C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
              6⤵
              • UAC bypass
              • System Location Discovery: System Language Discovery
              • Modifies registry key
              PID:2736
          • \??\c:\program files (x86)\internet explorer\iexplore.exe
            "c:\program files (x86)\internet explorer\iexplore.exe"
            5⤵
            • Adds policy Run key to start application
            • Adds Run key to start application
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4736
            • C:\Windows\SysWOW64\cmd.exe
              /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
              6⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:4792
              • C:\Windows\SysWOW64\reg.exe
                C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
                7⤵
                • UAC bypass
                • System Location Discovery: System Language Discovery
                • Modifies registry key
                PID:3592
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              6⤵
                PID:3596

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\ProgramData\Remcos\logs.dat

      Filesize

      144B

      MD5

      0b644ef29e9e49669a024b05aa4f360a

      SHA1

      757b52701160d26c89552c11ef80bfc67291d1fb

      SHA256

      efb2f2089b6916ef12fef3f3cdaf63b6710cab2069ba07bcc233c3e66a59bf27

      SHA512

      22c3c3a53bb744528ba27ac4bb96804833d3e537ca9f962f45bd279e0861933dd39b86b9b9fc5906852f8bd984b2754411e3116de9a3547d1479b20ad6b0fa04

    • C:\ProgramData\Remcos\remcos.exe

      Filesize

      469KB

      MD5

      87d7fffd5ec9e7bc817d31ce77dee415

      SHA1

      6cc44ccc0438c65cdef248cc6d76fc0d05e79222

      SHA256

      47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628

      SHA512

      1d2c6ec8676cb1cfbe37f808440287ea6a658d3f21829b5001c3c08a663722eb0537cc681a6faa7d39dc16a101fa2bbf55989a64a7c16143f11aa96033b886a5

    • C:\Users\Admin\AppData\Local\Temp\install.vbs

      Filesize

      386B

      MD5

      1ec6289c6fd4c2ded6b2836ed28cbeb5

      SHA1

      c4e08195e6c640eb8860acc03fda1d649b4fe070

      SHA256

      6efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2

      SHA512

      20bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288

    • memory/3596-18-0x0000000000A00000-0x0000000000A7F000-memory.dmp

      Filesize

      508KB

    • memory/3596-19-0x0000000000A00000-0x0000000000A7F000-memory.dmp

      Filesize

      508KB

    • memory/4736-9-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-14-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-17-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-11-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-10-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-20-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-21-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-23-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-24-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-25-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-26-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-28-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-29-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-31-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-32-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-33-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-34-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-36-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-37-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-39-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-40-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-41-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-42-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-44-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-45-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-47-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-48-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-49-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-50-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-52-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-53-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-55-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-56-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-57-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-58-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-60-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-61-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-63-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-64-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-65-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-66-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-69-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-71-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-73-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-75-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-76-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-77-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-79-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-80-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-81-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-83-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-84-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-85-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-87-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-88-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-89-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-90-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB

    • memory/4736-92-0x0000000000560000-0x00000000005DF000-memory.dmp

      Filesize

      508KB