Analysis

  • max time kernel
    169s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    01-02-2022 15:53

General

  • Target

    03ebe8dc4828536fea08858fdfc3b53237eb514fe8cf6bc7134afb41b22f96a2.exe

  • Size

    669KB

  • MD5

    c963b021bb8c55cacd4b830c67186232

  • SHA1

    58b69e090c23bbb16b656ee750f4e5a9aff246b2

  • SHA256

    03ebe8dc4828536fea08858fdfc3b53237eb514fe8cf6bc7134afb41b22f96a2

  • SHA512

    9755275e20b1b43fe62846d29a7df59b3e0ef56c718d43a0091b887ba0d32d9bbf8147054d0ffb75691ac630ec269727b38d233b6cedf3e3492340089f3452b0

Malware Config

Extracted

Path

C:\RECOVER_INSTRUCTIONS.html

Ransom Note
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=Edge"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, user-scalable=yes"> <title>Title</title> <style> html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video { margin: 0; padding: 0; border: 0; font-size: 100%; font: inherit; vertical-align: baseline; } /* HTML5 display-role reset for older browsers */ article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section { display: block; } body { font-family: Tahoma, Arial; background: #717798; } .all { max-width: 1170px; margin: auto; background: #000; min-height: 100px; border-radius: 10px; } .tl { text-align: center; color: #e03930; font-family: Tahoma; font-size: 28px; font-weight: 700; position: relative; height: 60px; line-height: 60px; } .close { padding: 15px; width: 36px; height: 36px; position: absolute; right: 15px; top:0; } .bg { background: #252a42; text-align: center; color: #ffffff; padding: 25px 15px; font-size: 18px; font-weight: 400; line-height: 20px; } .bg span { color: #f25252; } .bg a { color: #9676fd; font-size: 20px; font-style: italic; text-decoration: none; line-height: 35px; } .bg c { color: #f25252; font-weight: 500; font-size: 20px; line-height: 35px;} .footer { padding: 15px 0;} .tl2 { text-align: center; color: #e03930; font-size: 25px; font-weight: 500; line-height: 32px; text-decoration: underline; padding-bottom: 15px; } .text { min-height: 192px; color: #ffffff; font-size: 16px; font-weight: 500; line-height: 24px; } .text div { padding-right: 50px; padding-left: 50px; } @media (max-width: 767px) { .tl { height: auto; padding-right: 50px; line-height: 1.5; } .text div { padding: 0 15px; } .footer { background: none; } } </style> </head> <body> <div class="all"> <div class="container"> <div class="tl">All your data are encrypted! <div class="close"></div></div> <div class="bg"> <c>What happened?</c> <br> Your files are encrypted, and currently unavailable. <br> You can check it: all files on you computer has new expansion.<br> By the way, everything is possible to recover (restore), but you need to buy a unique decryptor. <br> Otherwise, you never cant return your data.<br> <br> <c>For purchasing a decryptor contact us by email: </c><br> <a href="mailto:[email protected]">[email protected]</a><br> If you will get no answer within 24 hours contact us by our alternate emails: <br> <a href="mailto:[email protected]">[email protected]</a> <br> <br> <c>What guarantees?</c> <br> Its just a business. If we do not do our work and liabilities - nobody will not cooperate with us.<br> To verify the possibility of the recovery of your files we can decrypted 1 file for free. <br> Attach 1 file to the letter (no more than 10Mb). Indicate your <b>personal ID</b> on the letter:<br> <span style="width:800px; word-wrap:break-word; display:inline-block; color: #ffffff; font-size: 10px;">2F7E7942554143CE14E370343E6B4DD771B19978FE7C17E63693A272CF2F497E8935D76AD17EECE4E825A0BF7CC573EE8BA95B2FA395CED8DB581B78DD50CE9F<br>753A5CE4B6EE11E89948EDDFA8059992B73B1A9BBA49390E1517CC32745BBDF3B8EE0BBB3AFA1E608AA883366CFC25FEA099C74DC58E1C9D63A944EDC7A5<br>12157F1035DDC7EDA4B536F0647CDD5BBE114BF9FFA6E4035C562DD3CA4A3EAE4B00085B5DD7A775BF5C36C9C9E200989CBC09D3DE485880008DAB549FDF<br>6ADF8FB796ED8F9E03BB0EB1B84B38CE70DC0302118FA78B28706098C03F4D82E293695E11FAAF67190F177AB0599409088FE85E2AE7393C73982F0DF53D<br>89143F6F6C2B2859D5AD5FCACE331EAA9F721E17E543E675AFC91AE85200E150B201B4A7B3FCCE0B60E3B9FC545538112FC5CE00CB88BB4FF2FEDFDFD0B3<br>7BB8C2802A97D96B9EB5B5E76E913EC78B3B0BC7C978E53EA8BC06E0C5B6EB8A50500D6122A342BD326D67BF9505F8653F92D25F5D073A7F3DAC3CE33C17<br>07D541528DAE0943C339A58DC7B45D5EF7DA2B78C4C56774096E8305E3617C95CEB37B78E8B392F87A191892E75B8413C25764DA514A53491E60684217C6<br>841F7C6A23D70429983585C31A55F16962D139AFAC5FCAEB6D780A61A3D2DB4559E7163DDCDD2726BB4704A12FA8C2B1197FD70BEBC4E47CDB130927E767<br>F21165AD4DA7C86BDBB4DB98AEA8</span> <br> </div> <div class="footer"> <div class="tl2"> Attention! </div> <div class="bg2"> <div class="text"> <div> - Attempts of change files by yourself will result in a loose of data. <br> - Our e-mail can be blocked over time. Write now, loss of contact with us will result in a loose of data.<br> - Use any third party software for restoring your data or antivirus solutions will result in a loose of data. <br> - Decryptors of other users are unique and will not fit your files and use of those will result in a loose of data.<br> - 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. </div> </div> </div> </div> </div> </div> </body> </html>
Emails

href="mailto:[email protected]">[email protected]</a><br>

href="mailto:[email protected]">[email protected]</a>

URLs

http-equiv="X-UA-Compatible"

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker Payload 2 IoCs
  • UAC bypass 3 TTPs
  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

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

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\03ebe8dc4828536fea08858fdfc3b53237eb514fe8cf6bc7134afb41b22f96a2.exe
    "C:\Users\Admin\AppData\Local\Temp\03ebe8dc4828536fea08858fdfc3b53237eb514fe8cf6bc7134afb41b22f96a2.exe"
    1⤵
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3532
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1912
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2360
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3952
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:772
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k wusvcs -p
    1⤵
      PID:1392
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      1⤵
      • Executes dropped EXE
      PID:1232

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\svhost.exe

      MD5

      c963b021bb8c55cacd4b830c67186232

      SHA1

      58b69e090c23bbb16b656ee750f4e5a9aff246b2

      SHA256

      03ebe8dc4828536fea08858fdfc3b53237eb514fe8cf6bc7134afb41b22f96a2

      SHA512

      9755275e20b1b43fe62846d29a7df59b3e0ef56c718d43a0091b887ba0d32d9bbf8147054d0ffb75691ac630ec269727b38d233b6cedf3e3492340089f3452b0

    • C:\Users\Admin\AppData\Roaming\svhost.exe

      MD5

      c963b021bb8c55cacd4b830c67186232

      SHA1

      58b69e090c23bbb16b656ee750f4e5a9aff246b2

      SHA256

      03ebe8dc4828536fea08858fdfc3b53237eb514fe8cf6bc7134afb41b22f96a2

      SHA512

      9755275e20b1b43fe62846d29a7df59b3e0ef56c718d43a0091b887ba0d32d9bbf8147054d0ffb75691ac630ec269727b38d233b6cedf3e3492340089f3452b0