Overview

overview

10

Static

static

10

a9a1473138...9d.exe

windows10-2004-x64

10

a9a1473138...9d.exe

windows11-ltsc_2024-x64

10

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General

  • Target
    c924b4111d2f268cd9b1944d419f154a4f72dc85c0b8ef929ef674a211939611
  • Size 39KB
  • Sample260812-fljkzswtbt
  • SHA256 c924b4111d2f268cd9b1944d419f154a4f72dc85c0b8ef929ef674a211939611
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
netwalkerdefense_evasiondiscoveryexecutionimpactransomwarespywarestealer

Malware Config

Extracted

Path

  • C:\Program Files\dotnet\D55999-Readme.txt

  • netwalker

Ransom Note
  • Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .d55999 -- 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. -- 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_d55999: 9nfCjuPdVVqHTcTooXHkJBxMc1TGdRcKpLtM9Bghs9gxe937LO EP5SGwpL2b/9ozCigPj0IyDAJpScFJQdFtfiL9d2YP7OhWr95D ehtGSnT1H8Tf3Su9z6CLhP40Jbzai/CawZyM4LsXUYleLRw66x ItT4TarknBUau4kyDBP/lRG7zvQJLcD1L16LQ/e1H81E//bUQj iwaNid2sZEmj7afE2vCZSc3bAGbNvxjKdlHWxpzwS4tGIcjnGn MCvDzkvjFfsVaOUP/OhQ56rroMrnrJKv4gwAEXhg==}
URLs

  • http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

  • http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

  • C:\Users\Admin\Searches\9F0965-Readme.txt

  • netwalker

Ransom Note
  • Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .9f0965 -- 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. -- 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_9f0965: EANAI1xuekauja2PVNZhDXGE/LnnY2npRGZB0wELBSzGWyZ4Ja wQ/0NfHMZ53CaImfiEz5A4AK+ZjMUMhiX9oHbhYtvcRSsMr95D emKwI0tzkcF6yIheC8pMIkiwHpQiXEQzQbJDApq83GKAyeurHR ton0rRQK8r80FJenGzw9wLlxFgVRMDBtAtRxtGTrMC1xDym7al za1Mfskg2PiLKcXnwf+swhs5pTDTX0wdSJeJh/LVKbNH0qanD9 3t8aK8wUQPUYcI/Ms0dSTENyGnOBS1sab/nBY0UA==}
URLs

  • http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

  • http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Targets

    • Target
      a9a147313861a5a4e7abd76b3287ce5f6183966b89c5ca95c0e0cf587f40189d.exe
    • Size 69KB
    • SHA256 a9a147313861a5a4e7abd76b3287ce5f6183966b89c5ca95c0e0cf587f40189d
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryexecutionnetwalkerimpactransomwarespywarestealer

    • Family: Netwalker Ransomware

      Ransomware family with multiple versions. Also known as MailTo.

      ransomwarenetwalker

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomwaredefense_evasionimpactexecution

    • Renames multiple (7521) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

      ransomware

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks