Analysis

  • max time kernel
    148s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    18-08-2024 10:47

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
  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • 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.

  • Uses the VBS compiler for execution 1 TTPs
  • 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 3 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 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
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3028
    • 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:2708
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe"
      2⤵
        PID:2872
      • C:\Windows\System32\svchost.exe
        "C:\Windows\System32\svchost.exe"
        2⤵
          PID:2576
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
          2⤵
            PID:2636
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
            2⤵
              PID:2260
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
              2⤵
                PID:1992
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe"
                2⤵
                  PID:2972
                • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
                  "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
                  2⤵
                  • Suspicious use of SetThreadContext
                  • System Location Discovery: System Language Discovery
                  • Suspicious behavior: MapViewOfSection
                  • Suspicious use of SetWindowsHookEx
                  PID:2928
                  • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
                    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\jgswnvulanjvgjgrcwpgjijzat"
                    3⤵
                    • System Location Discovery: System Language Discovery
                    • Suspicious behavior: EnumeratesProcesses
                    PID:976
                  • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
                    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\lbygoofeovbijxudthkauneqbadbi"
                    3⤵
                    • Accesses Microsoft Outlook accounts
                    • System Location Discovery: System Language Discovery
                    PID:676
                  • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
                    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\vvdzogqgcdtnteqhcsxbxzzzjgukbpmct"
                    3⤵
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:960
                • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
                  "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
                  2⤵
                    PID:2088

                Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                • C:\ProgramData\remcos\logs.dat

                  Filesize

                  144B

                  MD5

                  52c67efcd05d225dd3369c84457e8e0e

                  SHA1

                  56ae37d2dd6c24f6311190fd30b31609f695bb81

                  SHA256

                  acf1233d03c054a738a510b84e41b8659a331db2602a28aef37398f9f6f217a5

                  SHA512

                  43803f99580edee3654fe0c374dd9ac09b0dc8666f71ff926bdb19ea133a51e4f1aa740f00a03f256d2a026d4624c5496d7588e2c16e259a40b1c89d251ed51c

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

                  Filesize

                  2B

                  MD5

                  f3b25701fe362ec84616a93a45ce9998

                  SHA1

                  d62636d8caec13f04e28442a0a6fa1afeb024bbb

                  SHA256

                  b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

                  SHA512

                  98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

                • memory/2708-19-0x0000000002920000-0x0000000002928000-memory.dmp

                  Filesize

                  32KB

                • memory/2708-18-0x000000001B580000-0x000000001B862000-memory.dmp

                  Filesize

                  2.9MB

                • memory/2872-15-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/2872-16-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/2872-17-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/2872-14-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/2872-12-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/2872-13-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/2872-10-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/2872-8-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/3028-3-0x000000001A7D0000-0x000000001A8A0000-memory.dmp

                  Filesize

                  832KB

                • memory/3028-1-0x0000000000250000-0x000000000025C000-memory.dmp

                  Filesize

                  48KB

                • memory/3028-108-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

                  Filesize

                  9.9MB

                • memory/3028-2-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

                  Filesize

                  9.9MB

                • memory/3028-0-0x000007FEF5CF3000-0x000007FEF5CF4000-memory.dmp

                  Filesize

                  4KB