Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20231201-en
  • resource tags

    arch:x64arch:x86image:win7-20231201-enlocale:en-usos:windows7-x64system
  • submitted
    08/12/2023, 09:45

General

  • Target

    G9876545678009876.exe

  • Size

    757KB

  • MD5

    6696d37cf0b9b65fd9fc58934d79c9cb

  • SHA1

    6c75525f455c341e936ec64546fc4d9bfe52ee81

  • SHA256

    2db991b9ae725ec59f9a29654e4c5f8d2bf363662cfa8d271a8692fea4883744

  • SHA512

    b9db5f1832b7a6d046c029204d6061e13b1e4b1d3e1a0117a7f51d03aa08b6a5f97be2036cba93ceb17a4f558c4ddfd580a80185d9c8446818b854ebe1749a18

  • SSDEEP

    12288:HDWMD9ehE+uDneLBQt20dup/20AQBOLdxD4N1fahKDZncwk6pvxT0K0jlyOJN9R4:FeVZ27zZPdnjImBOQXU

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

107.175.229.139:8087

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-IZFV1M

  • 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.

  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 7 IoCs
  • Drops startup file 2 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\G9876545678009876.exe
    "C:\Users\Admin\AppData\Local\Temp\G9876545678009876.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2940
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
      "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\G9876545678009876.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'
      2⤵
      • Drops startup file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2092
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2692
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /stext "C:\Users\Admin\AppData\Local\Temp\fzctfclgbojribmjgoaqpfylt"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:2152
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /stext "C:\Users\Admin\AppData\Local\Temp\pthlgvwhpwbdspanpzmssjsccqpi"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:1868
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /stext "C:\Users\Admin\AppData\Local\Temp\anuwhngbletivvwrhjzldwntcxgrffux"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2660

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          b192bccaa38e247c338b07d54c70c2f2

          SHA1

          294111c160a4260f8e4dc2196cb563990c18cd1b

          SHA256

          f4332ecfd01c3c0c456970c6304fe2c18042655f74b9dc84e6f30907b3c88726

          SHA512

          32766d409755386ea0a5fb8a77edfd7e6e7d431437dc9e18828bf0189100615e18f4ef194ad2bbf6ca6e91a5acb1584026ff42d687976ff25995ef4348efd423

        • C:\Users\Admin\AppData\Local\Temp\fzctfclgbojribmjgoaqpfylt

          Filesize

          2B

          MD5

          f3b25701fe362ec84616a93a45ce9998

          SHA1

          d62636d8caec13f04e28442a0a6fa1afeb024bbb

          SHA256

          b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

          SHA512

          98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

        • memory/1868-53-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1868-65-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1868-42-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1868-49-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1868-51-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/2092-6-0x0000000070040000-0x00000000705EB000-memory.dmp

          Filesize

          5.7MB

        • memory/2092-7-0x0000000070040000-0x00000000705EB000-memory.dmp

          Filesize

          5.7MB

        • memory/2092-8-0x00000000028E0000-0x0000000002920000-memory.dmp

          Filesize

          256KB

        • memory/2092-10-0x0000000070040000-0x00000000705EB000-memory.dmp

          Filesize

          5.7MB

        • memory/2152-62-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2152-47-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2152-38-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2152-43-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2660-50-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2660-54-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2660-56-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2660-57-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2692-17-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-14-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-25-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-24-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-29-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-28-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-30-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-31-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-32-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-33-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-35-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-20-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

          Filesize

          4KB

        • memory/2692-94-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-21-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-19-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-18-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-93-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-16-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-15-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-27-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-13-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-12-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-86-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-85-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-78-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-66-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2692-70-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2692-69-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2692-72-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2692-71-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-75-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2692-77-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2940-2-0x0000000000650000-0x0000000000690000-memory.dmp

          Filesize

          256KB

        • memory/2940-1-0x0000000074940000-0x000000007502E000-memory.dmp

          Filesize

          6.9MB

        • memory/2940-3-0x0000000000EF0000-0x0000000000F9E000-memory.dmp

          Filesize

          696KB

        • memory/2940-11-0x0000000000260000-0x0000000000268000-memory.dmp

          Filesize

          32KB

        • memory/2940-0-0x0000000001240000-0x0000000001304000-memory.dmp

          Filesize

          784KB

        • memory/2940-23-0x0000000074940000-0x000000007502E000-memory.dmp

          Filesize

          6.9MB