Analysis

  • max time kernel
    148s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-08-2024 21:28

General

  • Target

    idk.exe

  • Size

    483KB

  • MD5

    783b3ecb43e1e04cac88e273c7ad2753

  • SHA1

    4df53206d490af68c1352091ba7a51fbe6d23139

  • SHA256

    dc0e648c50a81a0be80931b39a973d0edf899eb09c778e68a8b6025635696a05

  • SHA512

    cc5b563719391acf3a3c54d4ad527e59a0181f57d51a4fc97e7a3a19372392cfa98710f61962844948565e150b92ebf37b2710e30455506d11cfeb174986309b

  • SSDEEP

    6144:wTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrzT4:wTlrYw1RUh3NFn+N5WfIQIjbs/ZBkT4

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

k-peterson.gl.at.ply.gg:64076

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    Windows.exe

  • copy_folder

    Windows

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %WinDir%\System32

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-HIITQK

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • UAC bypass 3 TTPs 3 IoCs
  • Checks computer location settings 2 TTPs 1 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
  • Drops file in System32 directory 3 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 9 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 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\idk.exe
    "C:\Users\Admin\AppData\Local\Temp\idk.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2392
    • 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:4600
      • 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:860
    • C:\Windows\SysWOW64\Windows\Windows.exe
      "C:\Windows\SysWOW64\Windows\Windows.exe"
      2⤵
      • 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:3012
      • 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
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3920
        • 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
          4⤵
          • UAC bypass
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:1668
      • \??\c:\program files (x86)\internet explorer\iexplore.exe
        "c:\program files (x86)\internet explorer\iexplore.exe"
        3⤵
        • 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:4008
        • 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
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:640
          • 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
            5⤵
            • UAC bypass
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:4560
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          4⤵
            PID:4568

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      5390d65147fa3153cc8da80db0c06829

      SHA1

      fb8fa9118d153ea274627981f3feb50026ff8635

      SHA256

      9d481b39086746a27340848ef47bd1707d777138d73eb9a8e0826d5506a48f5e

      SHA512

      f30f3a5148abd91cef4e7463d1cb4b5e49fa537187f2e0f74e6edae91858314a01cfd4b3f1eeeb04beb9a979120102180ded80b1519d618dacbfb6ee461689f5

    • C:\Windows\SysWOW64\Windows\Windows.exe

      Filesize

      483KB

      MD5

      783b3ecb43e1e04cac88e273c7ad2753

      SHA1

      4df53206d490af68c1352091ba7a51fbe6d23139

      SHA256

      dc0e648c50a81a0be80931b39a973d0edf899eb09c778e68a8b6025635696a05

      SHA512

      cc5b563719391acf3a3c54d4ad527e59a0181f57d51a4fc97e7a3a19372392cfa98710f61962844948565e150b92ebf37b2710e30455506d11cfeb174986309b

    • memory/4008-72-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-37-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-34-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-36-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-54-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-85-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-46-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-41-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-59-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-53-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-86-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-35-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-52-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-60-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-66-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-67-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-33-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-73-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-79-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4008-80-0x0000000000500000-0x0000000000582000-memory.dmp

      Filesize

      520KB

    • memory/4568-45-0x00000000008B0000-0x0000000000932000-memory.dmp

      Filesize

      520KB

    • memory/4568-44-0x00000000008B0000-0x0000000000932000-memory.dmp

      Filesize

      520KB