Analysis

  • max time kernel
    1049s
  • max time network
    1036s
  • 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 21:03

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: GetForegroundWindowSpam 1 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:4108
    • 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:1992
      • 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:1060
    • 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:2856
      • 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:316
        • 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:884
      • \??\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: GetForegroundWindowSpam
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2160
        • 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:3952
          • 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:1516
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          4⤵
            PID:3520

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      230B

      MD5

      a68c17cb4182ba7393c1985f5eb11c4c

      SHA1

      206e49f389defdc9382649a3583105bebfbc815a

      SHA256

      56a1f9c5943ae7be7edfc049f1e5da92e626dcc5beeb528e730b720c06f593a6

      SHA512

      3d114e8a734ff30c515ac1d443125cbd2088bc581c06f645c33e98e686aff73873d444aed8fef6562e1264fd247226b2780038059e10e40f4074a22ae19f2c32

    • C:\ProgramData\remcos\logs.dat

      Filesize

      310B

      MD5

      8bc72116708a80776d2d349e9e1ec6ab

      SHA1

      a96df3b24b8dee6776098bfd81e030ca589da5ab

      SHA256

      13f6e504c34399aa78b92fc003845b229fcf091e1315b4542c21ba9a4532851b

      SHA512

      00447ab975ae8aed2bfa0eb018aaf7273f6028379b520a21694084485eefc5242b2ad04ba5e0c1db30ccb353fa6f36c1e068117e9c8be1671b335768b936880f

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

      Filesize

      483KB

      MD5

      783b3ecb43e1e04cac88e273c7ad2753

      SHA1

      4df53206d490af68c1352091ba7a51fbe6d23139

      SHA256

      dc0e648c50a81a0be80931b39a973d0edf899eb09c778e68a8b6025635696a05

      SHA512

      cc5b563719391acf3a3c54d4ad527e59a0181f57d51a4fc97e7a3a19372392cfa98710f61962844948565e150b92ebf37b2710e30455506d11cfeb174986309b

    • memory/2160-117-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-43-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-35-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-40-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-124-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-36-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-46-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-52-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-53-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-58-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-59-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-65-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-66-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-71-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-72-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-78-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-79-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-85-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-86-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-91-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-93-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-98-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-99-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-104-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-105-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-111-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-112-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-33-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-211-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-34-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-125-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-128-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-129-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-135-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-136-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-141-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-142-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-147-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-148-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-153-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-154-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-160-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-161-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-166-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-167-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-173-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-174-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-179-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-180-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-185-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-187-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-192-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-193-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-198-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-200-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-205-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-206-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/2160-118-0x0000000000900000-0x0000000000982000-memory.dmp

      Filesize

      520KB

    • memory/3520-44-0x0000000000EB0000-0x0000000000F32000-memory.dmp

      Filesize

      520KB

    • memory/3520-45-0x0000000000EB0000-0x0000000000F32000-memory.dmp

      Filesize

      520KB