Analysis

  • max time kernel
    110s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09-11-2020 20:17

General

  • Target

    99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e.dll

  • Size

    57KB

  • MD5

    06777fc51010815284f38dcff3769da1

  • SHA1

    05a1f84e040a30cfdfe70b855d6da8eefb0a82d7

  • SHA256

    99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e

  • SHA512

    5d4b0ea574adc22f2e90509f46166980adb26a3bc7d5e4ba6e1a7982865ebcff331185587bf7772a3a50adcfb529743735da51386c3dec68271b0d6376a217af

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\User Account Pictures\8D94CC-Readme.txt

Family

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: w2mr4XcMC8WeuaMQipbz203kl/IP5wyABP8+EDPIhw16Rs0ZZ3 GhZtPT3+wMC0nDVBgeHnozkG5dRWgFsg7EOOVgOVsWU40r65Yy i992hLMVu6n0qEUG4EO4jO+ZBjSv2b1dkqPfoFTQTHREvyS2tU hZU4c2P+racbhNln9+YNd+vesjVRCaTYMlz76FAwCJQ4H6edIN W8vQlc3aIbKbTEk8tUd7SkPe/KkAO+ei+cu/7dXudAVd7vwp7F B5n7/V8pP0YRG8vLxi3pkeXCScegFgtH8jZ3csZQ==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\ProgramData\Microsoft\Windows\Ringtones\8D94CC-Readme.txt

Family

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: w2mr4XcMC8WeuaMQipbz203kl/IP5wyABP8+EDPIhw16Rs0ZZ3 GhZtPT3+wMC0nDVBgeHnozkG5dRWgFsg7EOOVgOVsWU40r65Yy i992hLMVu6n0qEUG4EO4jO+ZBjSv2b1dkqPfoFTQTHREvyS2tU hZU4c2P+racbhNln9+YNd+vesjVRCaTYMlz76FAwCJQ4H6edIN W8vQlc3aIbKbTEk8tUd7SkPe/KkAO+ei+cu/7dXudAVd7vwp7F B5n7/V8pP0YRG8vLxi3pkeXCScegFgtH8jZ3csZQ==}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: w2mr4XcMC8WeuaMQipbz203kl/IP5wyABP8+EDPIhw16Rs0ZZ3 GhZtPT3+wMC0nDVBgeHnozkG5dRWgFsg7EOOVgOVsWU40r65Yy i992hLMVu6n0qEUG4EO4jO+ZBjSv2b1dkqPfoFTQTHREvyS2tU hZU4c2P+racbhNln9+YNd+vesjVRCaTYMlz76FAwCJQ4H6edIN W8vQlc3aIbKbTEk8tUd7SkPe/KkAO+ei+cu/7dXudAVd7vwp7F B5n7/V8pP0YRG8vLxi3pkeXCScegFgtH8jZ3csZQ==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\8D94CC-Readme.txt

Family

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: w2mr4XcMC8WeuaMQipbz203kl/IP5wyABP8+EDPIhw16Rs0ZZ3 GhZtPT3+wMC0nDVBgeHnozkG5dRWgFsg7EOOVgOVsWU40r65Yy i992hLMVu6n0qEUG4EO4jO+ZBjSv2b1dkqPfoFTQTHREvyS2tU hZU4c2P+racbhNln9+YNd+vesjVRCaTYMlz76FAwCJQ4H6edIN W8vQlc3aIbKbTEk8tUd7SkPe/KkAO+ei+cu/7dXudAVd7vwp7F B5n7/V8pP0YRG8vLxi3pkeXCScegFgtH8jZ3csZQ==}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: w2mr4XcMC8WeuaMQipbz203kl/IP5wyABP8+EDPIhw16Rs0ZZ3 GhZtPT3+wMC0nDVBgeHnozkG5dRWgFsg7EOOVgOVsWU40r65Yy i992hLMVu6n0qEUG4EO4jO+ZBjSv2b1dkqPfoFTQTHREvyS2tU hZU4c2P+racbhNln9+YNd+vesjVRCaTYMlz76FAwCJQ4H6edIN W8vQlc3aIbKbTEk8tUd7SkPe/KkAO+ei+cu/7dXudAVd7vwp7F B5n7/V8pP0YRG8vLxi3pkeXCScegFgtH8jZ3csZQ==}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: w2mr4XcMC8WeuaMQipbz203kl/IP5wyABP8+EDPIhw16Rs0ZZ3 GhZtPT3+wMC0nDVBgeHnozkG5dRWgFsg7EOOVgOVsWU40r65Yy i992hLMVu6n0qEUG4EO4jO+ZBjSv2b1dkqPfoFTQTHREvyS2tU hZU4c2P+racbhNln9+YNd+vesjVRCaTYMlz76FAwCJQ4H6edIN W8vQlc3aIbKbTEk8tUd7SkPe/KkAO+ei+cu/7dXudAVd7vwp7F B5n7/V8pP0YRG8vLxi3pkeXCScegFgtH8jZ3csZQ==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

  • Modifies extensions of user files 10 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 7472 IoCs
  • Suspicious behavior: EnumeratesProcesses 224 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\99597a1e872c4bc2ef740522090868854bfef090d1375c4906b1696d4161834e.dll,#1
      2⤵
      • Modifies extensions of user files
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1544
      • C:\Windows\SysWOW64\notepad.exe
        C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\8D94CC-Readme.txt"
        3⤵
          PID:5056

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Credential Access

    Credentials in Files

    1
    T1081

    Collection

    Data from Local System

    1
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\Desktop\8D94CC-Readme.txt
      MD5

      38e4a1966e7f44f407baeac26c8767ef

      SHA1

      a6185efbb95a02d893607c105e726b81cacadf35

      SHA256

      b21cd76d577a5107bfe75a93d3820bdc6cbc2df620f2b400c2970e1465fb6e1a

      SHA512

      f222eff6c2bd53bf5a7deb0861fc23df656c53d189bfe8572af5e7ef8f46beaf071906b65eb9672d00cce47268e6484a4018f1934a850a725ef79a4bb2176cef

    • memory/1544-0-0x0000000000000000-mapping.dmp
    • memory/5056-1-0x0000000000000000-mapping.dmp