Analysis

  • max time kernel
    148s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    17-08-2024 04:06

General

  • Target

    FTE98767800000.bat.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.

  • 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 45 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FTE98767800000.bat.exe
    "C:\Users\Admin\AppData\Local\Temp\FTE98767800000.bat.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:2384
    • 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.bat.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2792
    • C:\Windows\regedit.exe
      "C:\Windows\regedit.exe"
      2⤵
      • Runs regedit.exe
      PID:2832
    • 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:3016
      • C:\Program Files (x86)\Windows Mail\wab.exe
        "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\gvezwavqzkkpblbsamzughex"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:1828
      • C:\Program Files (x86)\Windows Mail\wab.exe
        "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\jprswkfknsccdrpwjxmvjuyodjsb"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:2908
      • C:\Program Files (x86)\Windows Mail\wab.exe
        "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\trwcxdqljauhnxlatizpuzlwmqjcekq"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2920
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2384 -s 824
      2⤵
        PID:2624

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      128B

      MD5

      da7ca21d252bf5192430f5333c957003

      SHA1

      1da05775454c4797e4d2b56683a75f3c49059492

      SHA256

      68b37c1a528b774d736ad9f864b9b2b1d4f177ed93973393427e28401036fb1e

      SHA512

      d265a9448ded050f7c99aa70e4b3a99c805f82d59299911d21b9626a3ad5da7ed86a62fe4a4e7f4b1d264222b3a20435a2098f3b4049d272a88bb0acb9f66716

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

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • memory/1828-62-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1828-64-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1828-58-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2384-3-0x0000000000AF0000-0x0000000000BC0000-memory.dmp

      Filesize

      832KB

    • memory/2384-0-0x000007FEF51F3000-0x000007FEF51F4000-memory.dmp

      Filesize

      4KB

    • memory/2384-2-0x000007FEF51F0000-0x000007FEF5BDC000-memory.dmp

      Filesize

      9.9MB

    • memory/2384-75-0x000007FEF51F3000-0x000007FEF51F4000-memory.dmp

      Filesize

      4KB

    • memory/2384-78-0x000007FEF51F0000-0x000007FEF5BDC000-memory.dmp

      Filesize

      9.9MB

    • memory/2384-1-0x0000000001330000-0x000000000133C000-memory.dmp

      Filesize

      48KB

    • memory/2792-10-0x0000000002BA0000-0x0000000002C20000-memory.dmp

      Filesize

      512KB

    • memory/2792-26-0x0000000002810000-0x0000000002818000-memory.dmp

      Filesize

      32KB

    • memory/2792-25-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

      Filesize

      2.9MB

    • memory/2832-23-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-11-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-8-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-13-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-15-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-17-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-19-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-21-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2908-61-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2908-63-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2908-60-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2920-68-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2920-66-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2920-67-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/3016-45-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-49-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-56-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-54-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-51-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-53-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-47-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-52-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-50-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-77-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-76-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-44-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3016-83-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3016-82-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3016-79-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3016-43-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB