Analysis

  • max time kernel
    147s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-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
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 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 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 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\idk.exe
    "C:\Users\Admin\AppData\Local\Temp\idk.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2704
    • 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:2744
      • 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:2820
    • 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:2604
      • 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:2872
        • 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:2788
      • \??\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:2684
        • 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:2624
          • 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:2596
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          4⤵
            PID:1840

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      d4625e23675b33a1f87718e1335b50ba

      SHA1

      4f9739d2f7865201acf14fb8d61f19b602c5b439

      SHA256

      29320abb65ed92a4ded579741c2507283fff25dc628a14da0a7578019ec1bf86

      SHA512

      2ba7dbcc36b2ec801b5e81fce44b301e8c89c2df8c7b137f1e9ab3391ac1402836080118e5df90611e7e843fba94b7302508bdd398ba381c59e727b2c4180074

    • \Windows\SysWOW64\Windows\Windows.exe

      Filesize

      483KB

      MD5

      783b3ecb43e1e04cac88e273c7ad2753

      SHA1

      4df53206d490af68c1352091ba7a51fbe6d23139

      SHA256

      dc0e648c50a81a0be80931b39a973d0edf899eb09c778e68a8b6025635696a05

      SHA512

      cc5b563719391acf3a3c54d4ad527e59a0181f57d51a4fc97e7a3a19372392cfa98710f61962844948565e150b92ebf37b2710e30455506d11cfeb174986309b

    • memory/1840-22-0x0000000000130000-0x00000000001B2000-memory.dmp

      Filesize

      520KB

    • memory/1840-23-0x0000000000130000-0x00000000001B2000-memory.dmp

      Filesize

      520KB

    • memory/1840-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2684-30-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-37-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-18-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-13-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-25-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2684-31-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-12-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-36-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-14-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-43-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-44-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-49-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-50-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-56-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-57-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-62-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB

    • memory/2684-63-0x0000000000180000-0x0000000000202000-memory.dmp

      Filesize

      520KB