Overview

overview

10

Static

static

4f7bdda79e...60.exe

windows7_x64

10

4f7bdda79e...60.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    127s
  • max time network
    118s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    23-05-2022 18:43

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General

  • Target

    4f7bdda79e389d6660fca8e2a90a175307a7f615fa7673b10ee820d9300b5c60.exe

  • Size

    65KB

  • MD5

    eaef25ab1f59492ffc735a386294b69f

  • SHA1

    76cc795c39cc19465c24825dc5ebafd7f944ea7e

  • SHA256

    4f7bdda79e389d6660fca8e2a90a175307a7f615fa7673b10ee820d9300b5c60

  • SHA512

    a812186ff05baa0c194abc2b4becc145f312b885068773f994658ecac2bfd8e1c85acdfe3774728541ed966f46a872d19fee17a53cc07f3f8e2e94be0cdef1c4

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\90AFE4-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .90afe4 -- 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 loosing 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_90afe4: +H5J1M4PzRBb6/e+Z1Fx3dEo3Z39LFfzxpKBdtqfNF5RD7W43u kUMbjys5rzRODd5z0ro1/B8x6JZC0JIKWTRGHmXIWAPA0iurP5 yzPkr5Bje/0krsqwp4tX5mJ9VkDmJMOF2DUjkQtMPinKqSl3yI D/O2gOhpaQU0VuYjos8KhySFB1vXZazWxcGZzIkidv/W2W9GPz 7fVwqfRruD0DKGUExjIjWwGQvqxPnESMR8soqYeGtfIPiAxqQG JU2/nNFu0/vYp0AvcQakeQ1AoBChQ1ZcgcQbO3AA==}
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
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Drops file in Program Files directory 64 IoCs
  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4f7bdda79e389d6660fca8e2a90a175307a7f615fa7673b10ee820d9300b5c60.exe
    "C:\Users\Admin\AppData\Local\Temp\4f7bdda79e389d6660fca8e2a90a175307a7f615fa7673b10ee820d9300b5c60.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:2352
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\90AFE4-Readme.txt"
      2⤵
        PID:8840
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\5F32.tmp.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:5700
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 2352
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:6880
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\90AFE4-Readme.txt
      1⤵
      • Suspicious use of FindShellTrayWindow
      PID:4836

    Network

    MITRE ATT&CK Enterprise v6

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\5F32.tmp.bat
      Filesize

      141B

      MD5

      07d9c2afd2509e24f69281bb972c852a

      SHA1

      3bdf5852e3a531c773e77aa254717d7f20860304

      SHA256

      64e8353ddb4e87025ba8844450efc41b0119a284585ffe82693925e133607f38

      SHA512

      4659b895e06f92c5d78d2fbdc097ae8e91b019469a57a14ca3b97ee6df39448cdcddc26be25a13e7c23f5835db3e5ce57dd3fd44609b4c2f833578528ade6ab0

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    • C:\Users\Admin\Desktop\90AFE4-Readme.txt
      Filesize

      2KB

      MD5

      600b1ab9b70bf121d78f396210ecf6e5

      SHA1

      84abd9ee24f127ac1f13f12a2556f34a86d24f57

      SHA256

      adf3147b948e2a695ecfdad90a7ec9d5d6ff3cf35910ee2d8983cbc58b686cba

      SHA512

      534207be90fe50f614d3cefffb81a48f2993d30c23228b29665073a0b048b8cc2b415aa46e564b9a1492240a75ebca484ff43b7be2e0a4d5c99eeed0a0ddeeed

      Download Submit

    • C:\Users\Admin\Desktop\90AFE4-Readme.txt
      Filesize

      2KB

      MD5

      600b1ab9b70bf121d78f396210ecf6e5

      SHA1

      84abd9ee24f127ac1f13f12a2556f34a86d24f57

      SHA256

      adf3147b948e2a695ecfdad90a7ec9d5d6ff3cf35910ee2d8983cbc58b686cba

      SHA512

      534207be90fe50f614d3cefffb81a48f2993d30c23228b29665073a0b048b8cc2b415aa46e564b9a1492240a75ebca484ff43b7be2e0a4d5c99eeed0a0ddeeed

      Download Submit