Overview

overview

10

Static

static

21-NetWalk...KB.ps1

windows10_x64

10

Analysis

  • max time kernel
    307s
  • max time network
    322s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    16-02-2022 23:47

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General

  • Target

    21-NetWalker_19_10_2020_903KB.ps1

  • Size

    902KB

  • MD5

    7770c598848339cf3562b7480856d584

  • SHA1

    b3d39042aab832b7d2bed732c8b8e600a4cf5197

  • SHA256

    ee3b0468a16789da8706d46aa361049ec51586c36899646a596b630d913e7304

  • SHA512

    02af6d5910f0627074fbea72901b2f2b491f7dba58f53ae1fad1dc47230e000a7b459c8475a76aaf006629bb5822d89d4672d32fb64d073464ca41140cb134d2

Score
10/10
netwalkerransomware

Malware Config

Extracted

Path

C:\Users\Admin\Downloads\A57739-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .a57739 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. Additionally, you must know that your sensitive data has been stolen by our analyst experts and if you choose to no cooperate with us, you are exposing yourself to huge penalties with lawsuits and government if we both don't find an agreement. We have seen it before; cases with multi million costs in fines and lawsuits, not to mention the company reputation and losing clients trust and the medias calling non-stop for answers. Come chat with us and you could be surprised on how fast we both can find an agreement without getting this incident public. -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_a57739: XbWD/2iHwwrrKILJOY97uSm2cddBd+HSqBGmOP4hJBFp+pXugP 2RXcRxjMk+zgO9rvMtZMj/xQTqqzteB3fNuo6Ql+bx9ukEkTQh 0pM5d6WCYdndu8KpgtxKbE645+tGA/qyBJdhUvwVnwCqrpN29a /LxQWRFDk4Kuso6Ch/oLGDvalDKUv59DUAgJp0vQAx6r3C2zVB HVid3j/xvI9V7HY/08jukk1E1ZluU+SxOi/HB0ithLCBoJg66R Rlie65y7XAGmluAb9J8CeIS5C2hQZ+rdD4YDxbPQ==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Modifies extensions of user files 4 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops file in Program Files directory 64 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 16 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Modifies extensions of user files
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2880
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\21-NetWalker_19_10_2020_903KB.ps1
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1800
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\jld5h0mw\jld5h0mw.cmdline"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:652
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
          C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES12F8.tmp" "c:\Users\Admin\AppData\Local\Temp\jld5h0mw\CSC7D6B9FAA1EB94380A4DBDDDC9ECDA6.TMP"
          4⤵
            PID:3920
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\c0lji5kd\c0lji5kd.cmdline"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:516
          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
            C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES460E.tmp" "c:\Users\Admin\AppData\Local\Temp\c0lji5kd\CSC645FD78FC77B40249CC67604619325.TMP"
            4⤵
              PID:2996
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:4004

      Network

      MITRE ATT&CK Matrix

      Replay Monitor

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      Downloads

      • memory/1800-128-0x0000022051346000-0x0000022051348000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1800-125-0x0000022051600000-0x0000022051676000-memory.dmp

        Filesize

        472KB

        Download

      • memory/1800-122-0x0000022051450000-0x0000022051472000-memory.dmp

        Filesize

        136KB

        Download

      • memory/1800-140-0x0000022051330000-0x0000022051338000-memory.dmp

        Filesize

        32KB

        Download

      • memory/1800-134-0x0000022051348000-0x0000022051349000-memory.dmp

        Filesize

        4KB

        Download

      • memory/1800-119-0x00007FFEEBA93000-0x00007FFEEBA94000-memory.dmp

        Filesize

        4KB

        Download

      • memory/1800-121-0x0000022051343000-0x0000022051345000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1800-120-0x0000022051340000-0x0000022051342000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1800-150-0x00000220515B0000-0x00000220515B8000-memory.dmp

        Filesize

        32KB

        Download

      • memory/2880-152-0x0000000001010000-0x0000000001032000-memory.dmp

        Filesize

        136KB

        Download