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

      • C:\Users\Admin\AppData\Local\Temp\RES12F8.tmp
        MD5

        e46db69db9f0a1d06ab4242de5a1bc04

        SHA1

        3d9c3d9b554e6713bb5f65feee8cc6aa25383d67

        SHA256

        fad917e602707d2992b2c94dddbb22bae6c0056402a573b2d4237c63ccd9c278

        SHA512

        675d950b471b370b6e32f1549d433704d0e866553e7fdec65abc34dd953e8cb88692dc3ca95f2edc8d62ec0c35a280b900b09bd60557d65873edc897251ac535

        Download Submit
      • C:\Users\Admin\AppData\Local\Temp\RES460E.tmp
        MD5

        db1c1b07ffabf825f7a050df79550266

        SHA1

        af0703603b40ab60fd479cd1deb06b1bdad3e5b7

        SHA256

        536d9520f9d9ff7e0cf584cc62c3064180380371012acbaebf491c5858654a51

        SHA512

        c3383d59145791c7ee5e5d737a5dbba1ed9cffac8cbe6de3170a6e5db2cbdf487a0af26bf9ff7fa007ee04d9d377660b7f3d5fc4be4335eea962e30c18b08a37

        Download Submit
      • C:\Users\Admin\AppData\Local\Temp\c0lji5kd\c0lji5kd.dll
        MD5

        aa2c4c13ee8f83e7750ca5e616fa682c

        SHA1

        56ee94f45b3f4c43f250093c7e615c307cce85e8

        SHA256

        797235b43c16bf5c8a97a4c3d1e3460b47302d621a14bec3b626fb19ec5c8b47

        SHA512

        bebb5e41e394a7aea4b4f4453a4b52141b9d364a13679c0fe665d4a98a780c0941ab29abc4b23f721b059448d4f9fcb1e11bafce1b3c24a871885cd7af6cc96b

        Download Submit
      • C:\Users\Admin\AppData\Local\Temp\jld5h0mw\jld5h0mw.dll
        MD5

        d33cac1ddf1fd2d2f5c7193c9779a890

        SHA1

        c85d5e6dadd15d8b5ddd7f38d612aa1c9d6b4348

        SHA256

        f6683a96f889c8a9475efda9f46c7baa917aabf93d7b6fa8485acb536adf9175

        SHA512

        85c7fb3a43c145cfa269d456c3c4a8b0300c16e0224658a293cfd12606eb9305043e14b7e196cdafa55e84d883bc2d55b2976a2f9af92c76c2564ea70ba190d8

        Download Submit
      • \??\c:\Users\Admin\AppData\Local\Temp\c0lji5kd\CSC645FD78FC77B40249CC67604619325.TMP
        MD5

        3402e5e8dcdb575be90c16e5d773c9f3

        SHA1

        211917bd85e4369257b245f46146c5324d6a2f26

        SHA256

        cf25ff7942ae0c0058705054f0abf1840f2ace5975e576d3ea55114d9baf1e11

        SHA512

        9a09b172e6b5dc6d1fbb3e0782b5d81f08da2e13cec7bf82e2cef68c529d6fb1145176be261099effc78b1b2bd29d90ae16a840c8885eebf6535bb43f1f35e2f

        Download Submit
      • \??\c:\Users\Admin\AppData\Local\Temp\c0lji5kd\c0lji5kd.0.cs
        MD5

        1cae52936facd4972987d3baef367d8d

        SHA1

        ad2b4b58d20f290b9da416cef1ef305cf1df6781

        SHA256

        28b45e56fb27763b4785974e380c96eef1436fc151a802f492db25052392d400

        SHA512

        4ae36c0ac78177eea5a6e0fbab0f51f7d24c7a76eae75b67eab41fcace921cef256b02fb088e1afb3c445e59598fbea73270e6bca1eda32514221190daa501df

        Download Submit
      • \??\c:\Users\Admin\AppData\Local\Temp\c0lji5kd\c0lji5kd.cmdline
        MD5

        6830e13c4eb3025dadbb2d9cd6d6d4d9

        SHA1

        f7ed31c8a846b0e43166056b059fe71033b3cf1b

        SHA256

        cc01080f949be3b5e6e894af0d61eec2d061e397335e9af9bcfa1a64f97087e5

        SHA512

        e233846c6f9c1121f9abd46af1b0ae0bbe628c0369294e7f57981eedd75e031a300cd5d8ba25bcf6946fef7e5c16a2313447914782a0169af6050a15f64a150f

        Download Submit
      • \??\c:\Users\Admin\AppData\Local\Temp\jld5h0mw\CSC7D6B9FAA1EB94380A4DBDDDC9ECDA6.TMP
        MD5

        28b7bf8b0911c4ec4fab72a4420ad1cf

        SHA1

        27467971dcbb05a7ac7b7b3b36ab00ef1cac6c0c

        SHA256

        1bc5231e5ba1c5bb4d52718968ad8474112d4d46bed7cfad8571b8e321d36845

        SHA512

        30c8a2ff4ec617bfd90d6097112bc35a6c652e575d989256d80639eb1cba801e1f2957fe5c8ddf6e83c6617dd3bed03d77d4883d54ce07167def9f4f9741a39d

        Download Submit
      • \??\c:\Users\Admin\AppData\Local\Temp\jld5h0mw\jld5h0mw.0.cs
        MD5

        64db54f88f46e2ecc57b05a25966da8e

        SHA1

        488dbbbab872714609ded38db924d38971a3685f

        SHA256

        e2b586aa1613682b4f1b92f981fea15d0612a3e632bbd73cd7287518c9ed7cb5

        SHA512

        8791b75874fd7a90bf63742abe6d299bc4370ad910591207d7630901d80765f6f6a4475809f23becf112360403423d0c691744f1024af3dd89c104f2b0b9e729

        Download Submit
      • \??\c:\Users\Admin\AppData\Local\Temp\jld5h0mw\jld5h0mw.cmdline
        MD5

        fc6e74476df9ee06c3431648c09d64c8

        SHA1

        e371e11e66e415fcc059520ba6420dc653e604c5

        SHA256

        a570639bc04283da8f22e6988900c737a903fefc50decaedae00c64fcc4d3443

        SHA512

        a8cf96c3fda93e30aa42f6c7af376990bf16415aec0e82d5d573cedd761289b8913de53dd540f6df45921015622dfd8c25e720a344d0682f5c8e9c09ba42dc9c

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      • 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