Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-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
  • 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.

  • 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 49 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:2356
    • 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:2572
    • C:\Windows\System32\calc.exe
      "C:\Windows\System32\calc.exe"
      2⤵
        PID:2156
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
        2⤵
          PID:2764
        • C:\Program Files (x86)\Windows Mail\wab.exe
          "C:\Program Files (x86)\Windows Mail\wab.exe"
          2⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2924
          • C:\Program Files (x86)\Windows Mail\wab.exe
            "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\kougsz"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:1724
          • C:\Program Files (x86)\Windows Mail\wab.exe
            "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\uqarsszsg"
            3⤵
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:1728
          • C:\Program Files (x86)\Windows Mail\wab.exe
            "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\wknjtkjtustpn"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:560
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 2356 -s 864
          2⤵
            PID:2724

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          128B

          MD5

          f6bce702a3e668368cce55e39acee431

          SHA1

          b3c887737ef11c4151717d6ecbb77cab56a8756c

          SHA256

          c94807ac6f74893072b86b59178b66b0e6b7b504e2d9d3dd2b49036928784a7b

          SHA512

          2c4ed5c8c884f5a2e8ded36b8a7cc71c207bb8695ea01175692df631745528bb0a5b3b9b40da609b7877eb6834c30e419850ccb7dfbfeadbed6055d2422ec341

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

          Filesize

          2B

          MD5

          f3b25701fe362ec84616a93a45ce9998

          SHA1

          d62636d8caec13f04e28442a0a6fa1afeb024bbb

          SHA256

          b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

          SHA512

          98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

        • memory/560-61-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/560-59-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/560-58-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/560-60-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1724-51-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1724-57-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1724-55-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1728-53-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/1728-56-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/1728-54-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/2156-10-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2156-8-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2156-12-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2156-11-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2156-13-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2156-4-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2156-6-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2156-9-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-0-0x000007FEF5843000-0x000007FEF5844000-memory.dmp

          Filesize

          4KB

        • memory/2356-68-0x000007FEF5843000-0x000007FEF5844000-memory.dmp

          Filesize

          4KB

        • memory/2356-75-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

          Filesize

          9.9MB

        • memory/2356-3-0x0000000000C90000-0x0000000000D60000-memory.dmp

          Filesize

          832KB

        • memory/2356-2-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

          Filesize

          9.9MB

        • memory/2356-1-0x0000000001270000-0x000000000127C000-memory.dmp

          Filesize

          48KB

        • memory/2572-18-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

          Filesize

          2.9MB

        • memory/2572-19-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

          Filesize

          32KB

        • memory/2924-69-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2924-45-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-73-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2924-44-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-36-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2924-37-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-38-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-39-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-74-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-49-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-103-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-46-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-42-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-43-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-79-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-80-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-47-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-87-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-88-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-95-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-96-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2924-72-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB