Analysis

  • max time kernel
    148s
  • 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 01:24

General

  • Target

    8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74.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
  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • 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
  • Accesses Microsoft Outlook accounts 1 TTPs 1 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 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74.exe
    "C:\Users\Admin\AppData\Local\Temp\8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74.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:4016
    • 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\8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2068
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1388
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\cxohfpxxobovwjg"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:1876
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\erbzghqyckgizpukskw"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:2132
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\ptgkhaasqsynjvqwbvjlfk"
        3⤵
          PID:1052
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\ptgkhaasqsynjvqwbvjlfk"
          3⤵
            PID:1000
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\ptgkhaasqsynjvqwbvjlfk"
            3⤵
              PID:3156
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
              C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\ptgkhaasqsynjvqwbvjlfk"
              3⤵
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:5068
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
            2⤵
              PID:2736

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\remcos\logs.dat

            Filesize

            144B

            MD5

            ee3a21f1cd0b1fb31778bcca165d0a38

            SHA1

            9c6e58d437662ce569e5d470c8a353a0f26f29d3

            SHA256

            c48593887cd11ad83663f129421e904df222146a910f5fab94880de1d6dedec3

            SHA512

            92d49c1d13afecfeeddc668914168b93c55d1fca6e48dcb3a24f3a7d47283b34625654dfed12b3425bd07e09625f5747c5fcef21707b1bdbd2bbe84f8ca27a94

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vuc5mge5.wvl.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

            Filesize

            4KB

            MD5

            c7ac5a21cac5bd5580a6e28112212613

            SHA1

            0a256177c387053fec680e599bcb63729a16c161

            SHA256

            89e0e7dc8ad418f8613610b71d0c140247e26a5f9a453ee255b1467fb80f15ff

            SHA512

            753675a75b643132e50175d67589a3952cb5154a7e51c11883b2e28bf4fe406afbaed88e61575cc114156e41ed5c587b0f76845e6d20ddf922e775bfff3f0b43

          • memory/1388-55-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-57-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-5-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-6-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-7-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-11-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-94-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-10-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-86-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-24-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-85-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-77-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-78-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-27-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-26-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-31-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-69-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-70-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-34-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-62-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-61-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-4-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-53-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/1388-93-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-28-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/1388-54-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/1388-50-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/1876-39-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/1876-35-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/1876-36-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/2068-13-0x00007FFD80080000-0x00007FFD80B41000-memory.dmp

            Filesize

            10.8MB

          • memory/2068-32-0x00007FFD80080000-0x00007FFD80B41000-memory.dmp

            Filesize

            10.8MB

          • memory/2068-12-0x00007FFD80080000-0x00007FFD80B41000-memory.dmp

            Filesize

            10.8MB

          • memory/2068-25-0x000002515B900000-0x000002515B910000-memory.dmp

            Filesize

            64KB

          • memory/2068-19-0x000002515B8D0000-0x000002515B8F2000-memory.dmp

            Filesize

            136KB

          • memory/2132-40-0x0000000000400000-0x0000000000462000-memory.dmp

            Filesize

            392KB

          • memory/2132-41-0x0000000000400000-0x0000000000462000-memory.dmp

            Filesize

            392KB

          • memory/2132-37-0x0000000000400000-0x0000000000462000-memory.dmp

            Filesize

            392KB

          • memory/4016-0-0x000001CCA5C60000-0x000001CCA5C6C000-memory.dmp

            Filesize

            48KB

          • memory/4016-3-0x000001CCC0230000-0x000001CCC0300000-memory.dmp

            Filesize

            832KB

          • memory/4016-1-0x00007FFD80083000-0x00007FFD80085000-memory.dmp

            Filesize

            8KB

          • memory/4016-2-0x00007FFD80080000-0x00007FFD80B41000-memory.dmp

            Filesize

            10.8MB

          • memory/4016-38-0x00007FFD80080000-0x00007FFD80B41000-memory.dmp

            Filesize

            10.8MB

          • memory/5068-46-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/5068-45-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/5068-47-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB