Overview

overview

10

Static

static

10

21bcb9c009...2f.exe

windows7_x64

10

21bcb9c009...2f.exe

windows10_x64

10

Analysis

  • max time kernel
    145s
  • max time network
    188s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    24-01-2022 02:25

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General

  • Target

    21bcb9c0095424a179399379939f6ebdf1dfe202825c1ca5acdd25a8f751402f.exe

  • Size

    164KB

  • MD5

    490b5528b76c657fbadf8707056af2eb

  • SHA1

    510dbc8f41626d1dabc1467947e81de8478f9024

  • SHA256

    21bcb9c0095424a179399379939f6ebdf1dfe202825c1ca5acdd25a8f751402f

  • SHA512

    c845d5ef765462af7317e033d0c2267e26bcc7dd55fb5558be8f99286a9b86f22e1ae5c74b3606e96dcd6b8aebba39da2edd0b5092bdab3f7c6beae839c5c89a

Score
10/10
ryukransomware

Malware Config

Extracted

Path

C:\jsf4w4m-readme.txt

Family

ryuk

Ransom Note
---=== Welcome. Again. ===--- [+] Whats Happen? [+] Your files are encrypted, and currently unavailable. You can check it: all files on your computer has extension jsf4w4m. By the way, everything is possible to recover (restore), but you need to follow our instructions. Otherwise, you cant return your data (NEVER). [+] What guarantees? [+] Its just a business. We absolutely do not care about you and your deals, except getting benefits. If we do not do our work and liabilities - nobody will not cooperate with us. Its not in our interests. To check the ability of returning files, You should go to our website. There you can decrypt one file for free. That is our guarantee. If you will not cooperate with our service - for us, its does not matter. But you will lose your time and data, cause just we have the private key. In practise - time is much more valuable than money. I suggest you read about us on the Internet, we are known as "Sodinokibi Ransomware" , for example, this article: https://www.coveware.com/blog/2019/7/15/ransomware-amounts-rise-3x-in-q2-as-ryuk-amp-sodinokibi-spread Pay attention to that: "How Much Data Is Decrypted with a Ransomware Decryptor? In Q2 2019, victims who paid for a decryptor recovered 92% of their encrypted data. This statistic varied dramatically depending on the ransomware type. For example, Ryuk ransomware has a relatively low data recovery rate, at ~ 87%, while Sodinokibi was close to 100%. " Now you have a guarantee that your files will be returned 100 %. [+] How to get access on website? [+] You have two ways: 1) [Recommended] Using a TOR browser! a) Download and install TOR browser from this site: https://torproject.org/ b) Open our website: http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/F7E9F6D5FCD5255E 2) If TOR blocked in your country, try to use VPN! But you can use our secondary website. For this: a) Open your any browser (Chrome, Firefox, Opera, IE, Edge) b) Open our secondary website: http://decryptor.top/F7E9F6D5FCD5255E Warning: secondary website can be blocked, thats why first variant much better and more available. When you open our website, put the following data in the input form: Key: hXMbRp6DfXxcPq+K/9ftjVM2fnfXOa7HjiMCVn7KYgm8yNRu2qcXY4ywFeWXyqvc mnwjZZAlP+Gl8GcD75uRm6Y0A61FnjhuaLchtD/Zjya0+Hvmj2we8K4+Xkw6572E nn2JpROnUsevXwFPDmcyAwJOlDzjd1p+buczzCpexLsslqzQx3Syo+OAlB8+Kitj n/suRdv1ngXOAoAcI0XWvPzm0gyDJENcL3LZgrEvTIuvYSvVGjRFzSZ2ggWSdkCT SrE45WUyyclVYC5A4fAHihLpK+DbFJfmbpyB8NMLBwVdDkg207k0ERZzEdGmgVh6 TVWZgCfiC1XjoX/FOBejSdowlxqiFXTGkBhqOVumNY6zFs9m28Arc4LKbCDRWWuZ CxlJWLahQpgue7vdgeYKTwOmdyhM8mMjmbs6YOgBisBDGnT6I74imycKWnqysQ1c /0hLzZlFk7NTLIxB8KJKhoTiQnqq9NicjmAt09axp4iNNEKe/t3ye2hVL2qoRK96 jiIIAy1OK0V2X15CJUs3LbeeRBQxz/9O0vF+R3Y1Dfm9TZ5lKq9e6QxfuKoVXheb zUYvQT20/ZJqe3j60ZCc4gMdrw/rMVWjvk3I3wJl8Bcm+ULKQBRci7BfZyKU6mB0 iilPU0h9kuswTE/viZggfHGtKmlyesqRCL2SjS5PRWT4MMEamnpY4j87H5Rc+8PR ju8qlcqgYZ79oOmAmiY3VDW8i8eNTfY9UU+78djLxsiDqfXZrnHtDFhtef3PPVyd QIFarwudo42IWtj1dWOZZHRtQE2KtpiN28W2KSSvqw4ivx/rTQQfI9sJZJ7Ei+/W 6j2anI8MN1CdHMrQPPaL3GTVtZiNv1FPZEze8T8VH9LtKvva6wLBp0raW0z81AsO oxRy+tN/WPVAEweyXvAR4Nxu/YaTc1jylJCylOhaysOSgdHfID+hSUaWy/JJgUg2 BChJdmVvr00JVBPztEb9elFyjh720dZ9QyEKkcp/qUsORz9EsHkj2gDXOLM/MSTt 9qlTN9fBq008yfwwp/1s6vbq7BhGC+iyCJ8oSsMetJVEXNr+Qdvdb3/ML0+aFKAl XAewnvYf+R/dd0zRS7ThnEsjhnkzKO9YPAw4TbKqsuLKPR/VxhnRgRfLoKpzyPos G8TaNvZz Extension name: jsf4w4m ----------------------------------------------------------------------------------------- !!! DANGER !!! DONT try to change files by yourself, DONT use any third party software for restoring your data or antivirus solutions - its may entail damge of the private key and, as result, The Loss all data. !!! !!! !!! ONE MORE TIME: Its in your interests to get your files back. From our side, we (the best specialists) make everything for restoring, but please should not interfere. !!! !!! !!!
URLs

https://www.coveware.com/blog/2019/7/15/ransomware-amounts-rise-3x-in-q2-as-ryuk-amp-sodinokibi-spread

http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/F7E9F6D5FCD5255E

http://decryptor.top/F7E9F6D5FCD5255E

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Modifies extensions of user files 6 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Enumerates connected drives 3 TTPs 25 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 1 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • Drops file in Program Files directory 19 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\21bcb9c0095424a179399379939f6ebdf1dfe202825c1ca5acdd25a8f751402f.exe
    "C:\Users\Admin\AppData\Local\Temp\21bcb9c0095424a179399379939f6ebdf1dfe202825c1ca5acdd25a8f751402f.exe"
    1⤵
    • Modifies extensions of user files
    • Enumerates connected drives
    • Drops file in System32 directory
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1088
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -e RwBlAHQALQBXAG0AaQBPAGIAagBlAGMAdAAgAFcAaQBuADMAMgBfAFMAaABhAGQAbwB3AGMAbwBwAHkAIAB8ACAARgBvAHIARQBhAGMAaAAtAE8AYgBqAGUAYwB0ACAAewAkAF8ALgBEAGUAbABlAHQAZQAoACkAOwB9AA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1256
  • C:\Windows\system32\wbem\unsecapp.exe
    C:\Windows\system32\wbem\unsecapp.exe -Embedding
    1⤵
      PID:564
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1044

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/1088-54-0x0000000076C61000-0x0000000076C63000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1256-55-0x000007FEFC321000-0x000007FEFC323000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1256-57-0x00000000028F0000-0x00000000028F2000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1256-58-0x00000000028F2000-0x00000000028F4000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1256-59-0x00000000028F4000-0x00000000028F7000-memory.dmp

      Filesize

      12KB

      Download

    • memory/1256-56-0x000007FEF35B0000-0x000007FEF410D000-memory.dmp

      Filesize

      11.4MB

      Download

    • memory/1256-60-0x000000001B6E0000-0x000000001B9DF000-memory.dmp

      Filesize

      3.0MB

      Download

    • memory/1256-61-0x00000000028FB000-0x000000000291A000-memory.dmp

      Filesize

      124KB

      Download