Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

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

  • 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.

  • Runs regedit.exe 1 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 58 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
    • 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:2584
    • 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:2804
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
      2⤵
        PID:2124
      • C:\Windows\regedit.exe
        "C:\Windows\regedit.exe"
        2⤵
        • Runs regedit.exe
        PID:2660
      • 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:1660
        • C:\Program Files (x86)\Windows Mail\wab.exe
          "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\gvbi"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:3056
        • C:\Program Files (x86)\Windows Mail\wab.exe
          "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\qphtyxo"
          3⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:2444
        • C:\Program Files (x86)\Windows Mail\wab.exe
          "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\asmlzqzwdy"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:1060
      • C:\Program Files (x86)\Windows Mail\wab.exe
        "C:\Program Files (x86)\Windows Mail\wab.exe"
        2⤵
          PID:1936

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\remcos\logs.dat

        Filesize

        144B

        MD5

        3fe46d45c60953e28d465a029dc4d5ad

        SHA1

        57c1643c5940ce7974611a7bff05e9073bcd1153

        SHA256

        0dfb04e9a221da24057cb6de5c02b815b30cc7449c9df44469fe6e196ffe9258

        SHA512

        e9d1ddd4f4ea0bc8fc4ac1b568388ea579c34808058ea93e26783574682e3f36822a0a6517e487eac1f005fbfa6701ce5f086692d5f23ac362432ce0482eedb5

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

        Filesize

        2B

        MD5

        f3b25701fe362ec84616a93a45ce9998

        SHA1

        d62636d8caec13f04e28442a0a6fa1afeb024bbb

        SHA256

        b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

        SHA512

        98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

      • memory/1660-69-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-73-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-70-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-71-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-60-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-68-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-61-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-62-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-65-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-66-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1660-59-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2124-21-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2124-19-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2124-11-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2124-14-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2124-9-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2124-23-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2124-15-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2124-17-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2584-3-0x0000000000680000-0x0000000000750000-memory.dmp

        Filesize

        832KB

      • memory/2584-0-0x000007FEF6513000-0x000007FEF6514000-memory.dmp

        Filesize

        4KB

      • memory/2584-67-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

        Filesize

        9.9MB

      • memory/2584-2-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

        Filesize

        9.9MB

      • memory/2584-1-0x0000000000290000-0x000000000029C000-memory.dmp

        Filesize

        48KB

      • memory/2804-25-0x000000001B690000-0x000000001B972000-memory.dmp

        Filesize

        2.9MB

      • memory/2804-26-0x0000000001C90000-0x0000000001C98000-memory.dmp

        Filesize

        32KB

      • memory/2804-8-0x0000000002B00000-0x0000000002B80000-memory.dmp

        Filesize

        512KB

      • memory/3056-75-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB