Analysis

  • max time kernel
    145s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2022 07:40

General

  • Target

    414f4a3b05028be19e006ae2ba9182b6.exe

  • Size

    595KB

  • MD5

    414f4a3b05028be19e006ae2ba9182b6

  • SHA1

    2a66efff8a0dfcf8d0ac247940b8f790c3c9d377

  • SHA256

    c09cb187ead292e38f9552449115d0e8ad5211f65cd6cc2ad2a2e8249d7481ec

  • SHA512

    82491b4e7876aa3d4306f1fdde6838e93fa123e0b66df8e262275be3fc5b80565475651bcc39765240467b209ca099522afa602ec414ebd9ee5bcaa8dc8a9a44

  • SSDEEP

    12288:Ongh/PsZ1DX/VDJ8rrvE4kynl6i6rJ49j9qkaxv:Ongh/PVU4kYqJK9qkC

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Nov 24th

C2

gcrozona.duckdns.org:6062

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    Microsoft Intel Audios.exe

  • copy_folder

    Audio Microsoft File

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • install_path

    %WinDir%

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    Windows Display

  • keylog_path

    %WinDir%

  • mouse_option

    false

  • mutex

    Windows Audio

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    Window Security Check

  • take_screenshot_option

    true

  • take_screenshot_time

    5

  • take_screenshot_title

    Username;password;proforma;invoice;notepad

Signatures

  • Remcos

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

  • UAC bypass 3 TTPs 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry key 1 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 59 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\414f4a3b05028be19e006ae2ba9182b6.exe
    "C:\Users\Admin\AppData\Local\Temp\414f4a3b05028be19e006ae2ba9182b6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1396
    • C:\Users\Admin\AppData\Local\Temp\414f4a3b05028be19e006ae2ba9182b6.exe
      "C:\Users\Admin\AppData\Local\Temp\414f4a3b05028be19e006ae2ba9182b6.exe"
      2⤵
        PID:596
      • C:\Users\Admin\AppData\Local\Temp\414f4a3b05028be19e006ae2ba9182b6.exe
        "C:\Users\Admin\AppData\Local\Temp\414f4a3b05028be19e006ae2ba9182b6.exe"
        2⤵
        • Adds Run key to start application
        • Drops file in Windows directory
        • Suspicious use of WriteProcessMemory
        PID:676
        • 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⤵
          • Suspicious use of WriteProcessMemory
          PID:1832
          • 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
            • Modifies registry key
            PID:1432
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
          3⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:1576
          • C:\Windows\SysWOW64\PING.EXE
            PING 127.0.0.1 -n 2
            4⤵
            • Runs ping.exe
            PID:1692
          • C:\Windows\Audio Microsoft File\Microsoft Intel Audios.exe
            "C:\Windows\Audio Microsoft File\Microsoft Intel Audios.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1084
            • C:\Windows\Audio Microsoft File\Microsoft Intel Audios.exe
              "C:\Windows\Audio Microsoft File\Microsoft Intel Audios.exe"
              5⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Drops file in Windows directory
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:1964
              • 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⤵
                • Suspicious use of WriteProcessMemory
                PID:988
                • 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
                  • Modifies registry key
                  PID:892
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
                6⤵
                  PID:1900

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        109B

        MD5

        8ddcdd0ab01b0740982e7b78b1591015

        SHA1

        acbb9c4bb32822a164f200f8b77eda0ce7bd758d

        SHA256

        7c1abbf1a20f581d2db76d769cc14cf753a412cf92e383a36ffbf0c962eaf678

        SHA512

        ef43e3cb89c800529530183d4315782a864281ef8a0e6443a54ccc4f1837fcbfe43027b399bb43ea114fab70416d49b3cb2539cf8bf658b4b447c4e8597959dc

      • C:\Windows\Audio Microsoft File\Microsoft Intel Audios.exe

        Filesize

        595KB

        MD5

        414f4a3b05028be19e006ae2ba9182b6

        SHA1

        2a66efff8a0dfcf8d0ac247940b8f790c3c9d377

        SHA256

        c09cb187ead292e38f9552449115d0e8ad5211f65cd6cc2ad2a2e8249d7481ec

        SHA512

        82491b4e7876aa3d4306f1fdde6838e93fa123e0b66df8e262275be3fc5b80565475651bcc39765240467b209ca099522afa602ec414ebd9ee5bcaa8dc8a9a44

      • C:\Windows\Audio Microsoft File\Microsoft Intel Audios.exe

        Filesize

        595KB

        MD5

        414f4a3b05028be19e006ae2ba9182b6

        SHA1

        2a66efff8a0dfcf8d0ac247940b8f790c3c9d377

        SHA256

        c09cb187ead292e38f9552449115d0e8ad5211f65cd6cc2ad2a2e8249d7481ec

        SHA512

        82491b4e7876aa3d4306f1fdde6838e93fa123e0b66df8e262275be3fc5b80565475651bcc39765240467b209ca099522afa602ec414ebd9ee5bcaa8dc8a9a44

      • C:\Windows\Audio Microsoft File\Microsoft Intel Audios.exe

        Filesize

        595KB

        MD5

        414f4a3b05028be19e006ae2ba9182b6

        SHA1

        2a66efff8a0dfcf8d0ac247940b8f790c3c9d377

        SHA256

        c09cb187ead292e38f9552449115d0e8ad5211f65cd6cc2ad2a2e8249d7481ec

        SHA512

        82491b4e7876aa3d4306f1fdde6838e93fa123e0b66df8e262275be3fc5b80565475651bcc39765240467b209ca099522afa602ec414ebd9ee5bcaa8dc8a9a44

      • \Windows\Audio Microsoft File\Microsoft Intel Audios.exe

        Filesize

        595KB

        MD5

        414f4a3b05028be19e006ae2ba9182b6

        SHA1

        2a66efff8a0dfcf8d0ac247940b8f790c3c9d377

        SHA256

        c09cb187ead292e38f9552449115d0e8ad5211f65cd6cc2ad2a2e8249d7481ec

        SHA512

        82491b4e7876aa3d4306f1fdde6838e93fa123e0b66df8e262275be3fc5b80565475651bcc39765240467b209ca099522afa602ec414ebd9ee5bcaa8dc8a9a44

      • \Windows\Audio Microsoft File\Microsoft Intel Audios.exe

        Filesize

        595KB

        MD5

        414f4a3b05028be19e006ae2ba9182b6

        SHA1

        2a66efff8a0dfcf8d0ac247940b8f790c3c9d377

        SHA256

        c09cb187ead292e38f9552449115d0e8ad5211f65cd6cc2ad2a2e8249d7481ec

        SHA512

        82491b4e7876aa3d4306f1fdde6838e93fa123e0b66df8e262275be3fc5b80565475651bcc39765240467b209ca099522afa602ec414ebd9ee5bcaa8dc8a9a44

      • memory/676-65-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/676-61-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/676-60-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/676-66-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/676-63-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/676-67-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/676-68-0x000000000040FD88-mapping.dmp

      • memory/676-71-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/676-76-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/676-73-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/892-100-0x0000000000000000-mapping.dmp

      • memory/988-99-0x0000000000000000-mapping.dmp

      • memory/1084-82-0x0000000000000000-mapping.dmp

      • memory/1084-84-0x0000000001310000-0x00000000013AC000-memory.dmp

        Filesize

        624KB

      • memory/1396-55-0x00000000760E1000-0x00000000760E3000-memory.dmp

        Filesize

        8KB

      • memory/1396-59-0x0000000001ED0000-0x0000000001EEE000-memory.dmp

        Filesize

        120KB

      • memory/1396-58-0x0000000004EE0000-0x0000000004F38000-memory.dmp

        Filesize

        352KB

      • memory/1396-57-0x0000000000330000-0x000000000033C000-memory.dmp

        Filesize

        48KB

      • memory/1396-56-0x0000000000350000-0x0000000000368000-memory.dmp

        Filesize

        96KB

      • memory/1396-54-0x00000000000F0000-0x000000000018C000-memory.dmp

        Filesize

        624KB

      • memory/1432-74-0x0000000000000000-mapping.dmp

      • memory/1576-75-0x0000000000000000-mapping.dmp

      • memory/1692-78-0x0000000000000000-mapping.dmp

      • memory/1832-72-0x0000000000000000-mapping.dmp

      • memory/1964-98-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/1964-94-0x000000000040FD88-mapping.dmp

      • memory/1964-101-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB

      • memory/1964-102-0x0000000000400000-0x0000000000417000-memory.dmp

        Filesize

        92KB