Overview

overview

10

Static

static

10

63ad8faf3c...c4.exe

windows7_x64

10

63ad8faf3c...c4.exe

windows10_x64

10

Analysis

  • max time kernel
    103s
  • max time network
    35s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09/11/2020, 20:17

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General

  • Target
    63ad8faf3c2b306ccd8aa7874e24e7d48e0f6bbeeb37adab26c2efa1410022c4.exe
  • Size 80KB
  • Sample201109-r57fphdr6e
  • SHA256 63ad8faf3c2b306ccd8aa7874e24e7d48e0f6bbeeb37adab26c2efa1410022c4
  • MD5 SHA1 SHA512
Score
10/10
netwalkerpersistenceransomwarespyware

Malware Config

Extracted

Path

  • C:\Program Files\Google\Chrome\Application\8D94CC-Readme.txt

  • netwalker

Ransom Note
  • Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .8d94cc -- 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_8d94cc: uHIbkWG1yK2ta/z+5TZOIJ/qlGr1jMVLUXbveC1OA8xyU2CQ20 Kk1KivrSIKIB0gh7l82rg3cZPFqpRQjYqjlv2K4ipPgD8d65Yy i3xp0yhIJoMR0mK7G2c2LbLw0jM6CqzdqymUUaShe9xWW3cO/a RJ1kA2JpWjTOe1PncPs0SQVBbh5ikXbuBxqLv8UYksHpXKkmgZ QKjWdi1EVFw6W/QOvU2I5RHNX+CDAZjCC9vZaYpz1jNeaD48FL sz93V437qkg8XB9KtYRl6Mx2V2Pav5OYYgn3mtZA==}
URLs

  • http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

  • http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

  • C:\Program Files (x86)\Microsoft Office\Office14\BORDERS\8D94CC-Readme.txt

  • netwalker

Ransom Note
  • Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .8d94cc -- 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_8d94cc: uHIbkWG1yK2ta/z+5TZOIJ/qlGr1jMVLUXbveC1OA8xyU2CQ20 Kk1KivrSIKIB0gh7l82rg3cZPFqpRQjYqjlv2K4ipPgD8d65Yy i3xp0yhIJoMR0mK7G2c2LbLw0jM6CqzdqymUUaShe9xWW3cO/a RJ1kA2JpWjTOe1PncPs0SQVBbh5ikXbuBxqLv8UYksHpXKkmgZ QKjWdi1EVFw6W/QOvU2I5RHNX+CDAZjCC9vZaYpz1jNeaD48FL sz93V437qkg8XB9KtYRl6Mx2V2Pav5OYYgn3mtZA==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .8d94cc -- 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_8d94cc: uHIbkWG1yK2ta/z+5TZOIJ/qlGr1jMVLUXbveC1OA8xyU2CQ20 Kk1KivrSIKIB0gh7l82rg3cZPFqpRQjYqjlv2K4ipPgD8d65Yy i3xp0yhIJoMR0mK7G2c2LbLw0jM6CqzdqymUUaShe9xWW3cO/a RJ1kA2JpWjTOe1PncPs0SQVBbh5ikXbuBxqLv8UYksHpXKkmgZ QKjWdi1EVFw6W/QOvU2I5RHNX+CDAZjCC9vZaYpz1jNeaD48FL sz93V437qkg8XB9KtYRl6Mx2V2Pav5OYYgn3mtZA==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .8d94cc -- 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_8d94cc: uHIbkWG1yK2ta/z+5TZOIJ/qlGr1jMVLUXbveC1OA8xyU2CQ20 Kk1KivrSIKIB0gh7l82rg3cZPFqpRQjYqjlv2K4ipPgD8d65Yy i3xp0yhIJoMR0mK7G2c2LbLw0jM6CqzdqymUUaShe9xWW3cO/a RJ1kA2JpWjTOe1PncPs0SQVBbh5ikXbuBxqLv8UYksHpXKkmgZ QKjWdi1EVFw6W/QOvU2I5RHNX+CDAZjCC9vZaYpz1jNeaD48FL sz93V437qkg8XB9KtYRl6Mx2V2Pav5OYYgn3mtZA==}
URLs

  • http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

  • http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

  • C:\Program Files (x86)\Microsoft Office\Templates\1033\8D94CC-Readme.txt

  • netwalker

Ransom Note
  • Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .8d94cc -- 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_8d94cc: uHIbkWG1yK2ta/z+5TZOIJ/qlGr1jMVLUXbveC1OA8xyU2CQ20 Kk1KivrSIKIB0gh7l82rg3cZPFqpRQjYqjlv2K4ipPgD8d65Yy i3xp0yhIJoMR0mK7G2c2LbLw0jM6CqzdqymUUaShe9xWW3cO/a RJ1kA2JpWjTOe1PncPs0SQVBbh5ikXbuBxqLv8UYksHpXKkmgZ QKjWdi1EVFw6W/QOvU2I5RHNX+CDAZjCC9vZaYpz1jNeaD48FL sz93V437qkg8XB9KtYRl6Mx2V2Pav5OYYgn3mtZA==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .8d94cc -- 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_8d94cc: uHIbkWG1yK2ta/z+5TZOIJ/qlGr1jMVLUXbveC1OA8xyU2CQ20 Kk1KivrSIKIB0gh7l82rg3cZPFqpRQjYqjlv2K4ipPgD8d65Yy i3xp0yhIJoMR0mK7G2c2LbLw0jM6CqzdqymUUaShe9xWW3cO/a RJ1kA2JpWjTOe1PncPs0SQVBbh5ikXbuBxqLv8UYksHpXKkmgZ QKjWdi1EVFw6W/QOvU2I5RHNX+CDAZjCC9vZaYpz1jNeaD48FL sz93V437qkg8XB9KtYRl6Mx2V2Pav5OYYgn3mtZA==}
URLs

  • http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

  • http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 10 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spyware
  • Modifies service 2 TTPs 5 IoCs
    persistence
  • Drops file in Program Files directory 7500 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 13777 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\63ad8faf3c2b306ccd8aa7874e24e7d48e0f6bbeeb37adab26c2efa1410022c4.exe
    "C:\Users\Admin\AppData\Local\Temp\63ad8faf3c2b306ccd8aa7874e24e7d48e0f6bbeeb37adab26c2efa1410022c4.exe"
    1⤵
    • Modifies extensions of user files
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1096
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1052
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\8D94CC-Readme.txt"
      2⤵
        PID:6540
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "C:\Users\Admin\AppData\Local\Temp\B74E.tmp.bat"
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:3756
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 1096
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:1580
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Modifies service
      • Suspicious use of AdjustPrivilegeToken
      PID:4844

    Network

          MITRE ATT&CK Enterprise v6

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