Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    13/02/2024, 02:15

General

  • Target
    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
  • Size 1.0MB
  • Sample240213-cpm6ssba82
  • SHA256 3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • P2-bin

C2
  • 84.38.132.126:61445

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-ANE1CN

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 26 IoCs
  • Detects executables built or packed with MPress PE compressor 19 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 2 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
    "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2652
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2940
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\bZurkfs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2828
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp899A.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2928
    • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
      "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
        PID:2584
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2620
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\sulbshhwnitreym"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:312
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\dwqutzsybqlegmiqdki"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:612
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\nqweusdrpydjrswcmuvgbf"
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2616

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          logs.dat

          • Path C:\ProgramData\remcos\logs.dat
          • Size 144B
          • SHA256 40cbc1b17c7cb53e817fab41df6f0a7618f7c7b714490bdca864b4c0c33685f9
          • MD5 SHA1 SHA512

          sulbshhwnitreym

          • Path C:\Users\Admin\AppData\Local\Temp\sulbshhwnitreym
          • Size 2B
          • SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
          • MD5 SHA1 SHA512

          tmp899A.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmp899A.tmp
          • Size 1KB
          • SHA256 732512c1c6337fd2b5fcdf26c7d3b5f123ac51f5feb5c33b6dedb7b0ae4434dc
          • MD5 SHA1 SHA512

          d93f411851d7c929.customDestinations-ms

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
          • Size 7KB
          • SHA256 2010dfc95bd95756655897125750edc45cb51080610170545fdb9559b3fea21a
          • MD5 SHA1 SHA512 SSDEEP

          memory/312-92-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/312-67-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/312-73-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/312-70-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/612-94-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/612-81-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/612-78-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/612-80-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/612-74-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/2616-86-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/2616-85-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/2616-83-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/2616-79-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/2620-35-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-100-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2620-37-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-132-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-39-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-125-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-124-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-116-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-44-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-110-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2620-46-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-107-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-106-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-48-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-103-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-102-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2620-98-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2620-95-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2620-53-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-99-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2620-56-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-57-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-58-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-60-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-62-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-63-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-64-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-33-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          memory/2620-29-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-31-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-27-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-25-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-23-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-21-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-20-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2620-19-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2652-3-0x0000000000460000-0x0000000000474000-memory.dmp

          memory/2652-0-0x0000000000B60000-0x0000000000C6A000-memory.dmp

          memory/2652-4-0x0000000000490000-0x000000000049A000-memory.dmp

          memory/2652-1-0x00000000745C0000-0x0000000074CAE000-memory.dmp

          memory/2652-2-0x0000000007290000-0x00000000072D0000-memory.dmp

          memory/2652-6-0x0000000007480000-0x0000000007546000-memory.dmp

          memory/2652-40-0x00000000745C0000-0x0000000074CAE000-memory.dmp

          memory/2652-5-0x00000000004A0000-0x00000000004AE000-memory.dmp

          memory/2828-51-0x000000006E090000-0x000000006E63B000-memory.dmp

          memory/2828-52-0x00000000028B0000-0x00000000028F0000-memory.dmp

          memory/2828-50-0x00000000028B0000-0x00000000028F0000-memory.dmp

          memory/2828-54-0x000000006E090000-0x000000006E63B000-memory.dmp

          memory/2828-43-0x00000000028B0000-0x00000000028F0000-memory.dmp

          memory/2828-41-0x000000006E090000-0x000000006E63B000-memory.dmp

          memory/2940-49-0x0000000002360000-0x00000000023A0000-memory.dmp

          memory/2940-47-0x000000006E090000-0x000000006E63B000-memory.dmp

          memory/2940-45-0x0000000002360000-0x00000000023A0000-memory.dmp

          memory/2940-55-0x000000006E090000-0x000000006E63B000-memory.dmp

          memory/2940-38-0x000000006E090000-0x000000006E63B000-memory.dmp