Analysis

  • max time kernel
    137s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-08-2024 09:19

General

  • Target

    FTE98767800000.exe

  • Size

    1.4MB

  • MD5

    e418c8ddea38739c5fa4e6ee469ffd47

  • SHA1

    52ee59d5c7d3768056ac7809aea362e8adbeaa74

  • SHA256

    8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74

  • SHA512

    3879b2ff0821511222cd9de8dc369037df52f655c2be937c4499cd9006049ed3a671c6ccd33f0adfa499aec935e14e388449574b5f282e6f5a230993b9192128

  • SSDEEP

    12288:0EOm/U97V194bWub1V5jdJislsmq/aWPNUEFkWsnFvM1XcCDB6iCuIgWPm3A5kIo:m9B19g5V5nxsmqaWPaEXsnfCPu6BH

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.210.150.26:8787

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-Q4NYK2

  • 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 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Windows security modification 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FTE98767800000.exe
    "C:\Users\Admin\AppData\Local\Temp\FTE98767800000.exe"
    1⤵
    • UAC bypass
    • Windows security bypass
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Windows security modification
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:448
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\FTE98767800000.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3988
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"
      2⤵
        PID:3200
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3200 -s 24
          3⤵
          • Program crash
          PID:4488
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"
        2⤵
          PID:1532
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3200 -ip 3200
        1⤵
          PID:3336

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5yirshil.kis.psm1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • memory/448-0-0x00007FFD692A3000-0x00007FFD692A5000-memory.dmp

          Filesize

          8KB

        • memory/448-1-0x000001A51A610000-0x000001A51A61C000-memory.dmp

          Filesize

          48KB

        • memory/448-2-0x00007FFD692A0000-0x00007FFD69D61000-memory.dmp

          Filesize

          10.8MB

        • memory/448-3-0x000001A534C20000-0x000001A534CF0000-memory.dmp

          Filesize

          832KB

        • memory/448-21-0x00007FFD692A0000-0x00007FFD69D61000-memory.dmp

          Filesize

          10.8MB

        • memory/3200-4-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/3988-14-0x00007FFD692A0000-0x00007FFD69D61000-memory.dmp

          Filesize

          10.8MB

        • memory/3988-15-0x00000210BAD70000-0x00000210BAD92000-memory.dmp

          Filesize

          136KB

        • memory/3988-16-0x00007FFD692A0000-0x00007FFD69D61000-memory.dmp

          Filesize

          10.8MB

        • memory/3988-17-0x00007FFD692A0000-0x00007FFD69D61000-memory.dmp

          Filesize

          10.8MB

        • memory/3988-20-0x00007FFD692A0000-0x00007FFD69D61000-memory.dmp

          Filesize

          10.8MB