Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-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
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 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 key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 46 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
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2640
    • 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:2088
      • 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:2764
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2952
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2844
        • 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:2812
          • 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:2908
            • 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:2560
          • \??\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:2572
            • 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:1844
              • 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:2916
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              6⤵
                PID:892

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Remcos\logs.dat

      Filesize

      144B

      MD5

      f5bd2b38ed351234a299e696a179c1bd

      SHA1

      37c49bc69eadfdd1023cbd071568f37769e13211

      SHA256

      be27c2ab7b263c9eb11738514d8aa3eb1e3ffadb4f636fbd01fb0efe6a393e0c

      SHA512

      27c72ec107dd740fe9f62328f4f2017d66e39dba154de63e1de614c1454092617253c860c74ec1d635b7bec872a8cbad148c83a8bcf6ffa0262e6fdcc37039a1

    • 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/892-21-0x0000000000080000-0x00000000000FF000-memory.dmp

      Filesize

      508KB

    • memory/892-20-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/892-22-0x0000000000080000-0x00000000000FF000-memory.dmp

      Filesize

      508KB

    • memory/2572-45-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-23-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-13-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-12-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-16-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-19-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-51-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-24-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-25-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-26-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-28-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-29-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-30-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-31-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-33-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-34-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-35-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-36-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-37-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-52-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-40-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-41-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-42-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-43-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-11-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-46-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-47-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-48-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-50-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2572-39-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-53-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-55-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-56-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-57-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-58-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-59-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-61-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-62-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-63-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-64-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-65-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-67-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-68-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-69-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-70-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-72-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-73-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-74-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-75-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-76-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-78-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-79-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-80-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-81-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-83-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB

    • memory/2572-84-0x0000000000230000-0x00000000002AF000-memory.dmp

      Filesize

      508KB