Analysis

  • max time kernel
    72s
  • max time network
    69s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    12-08-2024 05:56

General

  • Target

    remcos_a.exe

  • Size

    483KB

  • MD5

    a71c2ec29d24f8abfc5686b136f71f22

  • SHA1

    01929dffa443b3d17d2c9f32e2efa31759aec136

  • SHA256

    de06ee1f57bc4475cf0a9a7352b0ca51b31bee6aee54429982a6ab7bdf8795e9

  • SHA512

    10de0945c8640a495b8c2617f55d2de75cd05b87f99a6e201bb2d12a9f522dc0536e161d64c5be5ea13672bc4492d3effa9f2b25540834e09e001d826b4dd565

  • SSDEEP

    6144:wTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccriT4:wTlrYw1RUh3NFn+N5WfIQIjbs/ZBFT4

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.168.1.252:2404

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

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-39LPSU

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • 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 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 6 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 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\remcos_a.exe
    "C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2692
    • 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:1068
      • 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:2920
    • \??\c:\program files (x86)\internet explorer\iexplore.exe
      "c:\program files (x86)\internet explorer\iexplore.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1664
      • 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:1016
        • 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:2280
      • C:\Windows\SysWOW64\svchost.exe
        svchost.exe
        3⤵
          PID:1164

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      816fcf1d5c3a96e059728032a2547e54

      SHA1

      307b21319e23f2541b59a4fde9d56b5fa2140fb9

      SHA256

      404bf228af5660d34eb8b9ad14f74fe35c82c3fd38bce27b22119ec4d4b11303

      SHA512

      318e9ee8bdbf245d5fcc8c7aaea677d66442f85b2d5a21ae2fd96b589f32c61757c85c3db24e45a04d06563c2164f4d9b02ca73a469fbebe81aa5053463efafa

    • memory/1164-18-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1164-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1664-23-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-24-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-0-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1664-5-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-4-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-8-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-9-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-12-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-25-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-2-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-30-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-31-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-38-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB

    • memory/1664-39-0x0000000000080000-0x0000000000102000-memory.dmp

      Filesize

      520KB