Analysis

  • max time kernel
    130s
  • max time network
    132s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    26-07-2021 12:41

General

  • Target

    488261e1e0793e6830f68c572db7e229af1d9403bbc8e61b9da707b1b63a137d.sample.exe

  • Size

    69KB

  • MD5

    3229e2489dde524195cf0ccbbf5f7d40

  • SHA1

    a257fc0b117fb9e0a6df128213e11de5cee21129

  • SHA256

    488261e1e0793e6830f68c572db7e229af1d9403bbc8e61b9da707b1b63a137d

  • SHA512

    d719fcf974a9304154daf95f0c80805b9a720a1db1289aa4fd189494cb0c29820a1b999d26fb38378d3a47602b26ff8375189ed9586a9c94c19fae0f4e0c650e

Malware Config

Extracted

Path

C:\C7FE97-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .c7fe97 -- 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_c7fe97: hQNPHY9MdoiCkYcydItGnRwil8c6zTA0zVN40QOSRmX5j7Npxc aOSmIWRyTwn3C4K7cK/S0c6ZloRcyaYc7VffdYsdOD2SFlgw2l dH1x8SD9fgV4eVL6Zc9FyI6XUYhzfDz39ofjpadQwyqt/16mWf b6J2DoVNLC8lfXTVfnfhfsmQTY8JMFum/+WOxtiJzkbeiKgRmy qhyQJIYIBgZ7/dtYalAY847lQpZ2GM69Zy1fU53WTYnsTgcDLQ t92rXRJFwvL5JKYEa6nTYkIfunxx0sYKbfzXsymw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .c7fe97 -- 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_c7fe97: hQNPHY9MdoiCkYcydItGnRwil8c6zTA0zVN40QOSRmX5j7Npxc aOSmIWRyTwn3C4K7cK/S0c6ZloRcyaYc7VffdYsdOD2SFlgw2l dH1x8SD9fgV4eVL6Zc9FyI6XUYhzfDz39ofjpadQwyqt/16mWf b6J2DoVNLC8lfXTVfnfhfsmQTY8JMFum/+WOxtiJzkbeiKgRmy qhyQJIYIBgZ7/dtYalAY847lQpZ2GM69Zy1fU53WTYnsTgcDLQ t92rXRJFwvL5JKYEa6nTYkIfunxx0sYKbfzXsymw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\odt\C7FE97-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .c7fe97 -- 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_c7fe97: hQNPHY9MdoiCkYcydItGnRwil8c6zTA0zVN40QOSRmX5j7Npxc aOSmIWRyTwn3C4K7cK/S0c6ZloRcyaYc7VffdYsdOD2SFlgw2l dH1x8SD9fgV4eVL6Zc9FyI6XUYhzfDz39ofjpadQwyqt/16mWf b6J2DoVNLC8lfXTVfnfhfsmQTY8JMFum/+WOxtiJzkbeiKgRmy qhyQJIYIBgZ7/dtYalAY847lQpZ2GM69Zy1fU53WTYnsTgcDLQ t92rXRJFwvL5JKYEa6nTYkIfunxx0sYKbfzXsymw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\images\C7FE97-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .c7fe97 -- 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_c7fe97: hQNPHY9MdoiCkYcydItGnRwil8c6zTA0zVN40QOSRmX5j7Npxc aOSmIWRyTwn3C4K7cK/S0c6ZloRcyaYc7VffdYsdOD2SFlgw2l dH1x8SD9fgV4eVL6Zc9FyI6XUYhzfDz39ofjpadQwyqt/16mWf b6J2DoVNLC8lfXTVfnfhfsmQTY8JMFum/+WOxtiJzkbeiKgRmy qhyQJIYIBgZ7/dtYalAY847lQpZ2GM69Zy1fU53WTYnsTgcDLQ t92rXRJFwvL5JKYEa6nTYkIfunxx0sYKbfzXsymw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .c7fe97 -- 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_c7fe97: hQNPHY9MdoiCkYcydItGnRwil8c6zTA0zVN40QOSRmX5j7Npxc aOSmIWRyTwn3C4K7cK/S0c6ZloRcyaYc7VffdYsdOD2SFlgw2l dH1x8SD9fgV4eVL6Zc9FyI6XUYhzfDz39ofjpadQwyqt/16mWf b6J2DoVNLC8lfXTVfnfhfsmQTY8JMFum/+WOxtiJzkbeiKgRmy qhyQJIYIBgZ7/dtYalAY847lQpZ2GM69Zy1fU53WTYnsTgcDLQ t92rXRJFwvL5JKYEa6nTYkIfunxx0sYKbfzXsymw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .c7fe97 -- 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_c7fe97: hQNPHY9MdoiCkYcydItGnRwil8c6zTA0zVN40QOSRmX5j7Npxc aOSmIWRyTwn3C4K7cK/S0c6ZloRcyaYc7VffdYsdOD2SFlgw2l dH1x8SD9fgV4eVL6Zc9FyI6XUYhzfDz39ofjpadQwyqt/16mWf b6J2DoVNLC8lfXTVfnfhfsmQTY8JMFum/+WOxtiJzkbeiKgRmy qhyQJIYIBgZ7/dtYalAY847lQpZ2GM69Zy1fU53WTYnsTgcDLQ t92rXRJFwvL5JKYEa6nTYkIfunxx0sYKbfzXsymw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies extensions of user files 6 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\488261e1e0793e6830f68c572db7e229af1d9403bbc8e61b9da707b1b63a137d.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\488261e1e0793e6830f68c572db7e229af1d9403bbc8e61b9da707b1b63a137d.sample.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:3156
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1160
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\C7FE97-Readme.txt"
      2⤵
        PID:6848
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\D4AB.tmp.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:9160
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 3156
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:5384
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:8496

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    File Deletion

    2
    T1107

    Credential Access

    Credentials in Files

    1
    T1081

    Collection

    Data from Local System

    1
    T1005

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\D4AB.tmp.bat
      MD5

      f50239ce42ac029bddd455c7de7c0bc2

      SHA1

      ef29f8e910e84b306221155953d5cc41f256affd

      SHA256

      faa5fac5bf086fa65a6c6e10ef5f677f5415d70bee5af4abe198cf8c6bcaf639

      SHA512

      6aad47a408024e68fa9b0b9139d4c19e9b90581c91574216bcee730ef224ef269c888adb6731ab1dfca24a33516bf4ec480abb75fc524aa0a47188ef0218f764

    • C:\Users\Admin\Desktop\C7FE97-Readme.txt
      MD5

      d4498a21ccb55b5527ec91aa7a10a79d

      SHA1

      7e4ad259c317bf585d550804a00a427abd304009

      SHA256

      1fcdd19b225bafe4780420f514b02d13369b25b1179143844406ff6655584eca

      SHA512

      8edff9e917c150475609ec5d32e2986e76691c5b5be391e18e57a4840f2512ffd976aae124e4d33becb7e32fa17137252d678680aea002f93ce0352bb1dcbc45

    • memory/1160-114-0x0000000000000000-mapping.dmp
    • memory/5384-118-0x0000000000000000-mapping.dmp
    • memory/6848-115-0x0000000000000000-mapping.dmp
    • memory/9160-116-0x0000000000000000-mapping.dmp