Analysis

  • max time kernel
    137s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    08-04-2022 10:50

General

  • Target

    58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a.exe

  • Size

    669KB

  • MD5

    419ee6eb592f5a59f536f28106c1a4c5

  • SHA1

    da865c98e5b93f56b4e63541042740786ccc6fe9

  • SHA256

    58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a

  • SHA512

    85e469f727628ea30a3a3f775686e45b9b77bbe18516fc83be1d1b5ea1e0347d9caf59048ef9dd364f9f73696766d5b113162c2598c19301864769cb0b362199

Malware Config

Extracted

Path

C:\HOW_TO_RECOVER_DATA.html

Ransom Note
<html> <style type="text/css"> body { background-color: #f5f5f5; } h1, h3{ text-align: center; text-transform: uppercase; font-weight: normal; } /*---*/ .tabs1{ display: block; margin: auto; } .tabs1 .head{ text-align: center; float: top; padding: 0px; text-transform: uppercase; font-weight: normal; display: block; background: #81bef7; color: #DF0101; font-size: 30px; } .tabs1 .identi { font-size: 10px; text-align: center; float: top; padding: 15px; display: block; background: #81bef7; color: #DFDFDF; } .tabs .content { background: #f5f5f5; /*text-align: center;*/ color: #000000; padding: 25px 15px; font-size: 15px; font-weight: 400; line-height: 20px; } .tabs .content a { color: #df0130; font-size: 23px; font-style: italic; text-decoration: none; line-height: 35px; } .tabs .content .text{ padding: 25px; line-height: 1.2; } </style> <body> <div class="tabs1"> <div class="head" ><b>Your personal ID:</b></div> <div class="identi"> <span style="width:1000px; color: #ffffff; font-size: 10px;">2B4F04DCAB4CCC937B0C99CA58E81815EB463EE9CC3FB2506688278AA82C862F7C65759C0A626A3CC01E19C04187CE8D8AC66EFEF758E84289904A2521DB8463<br>92E04453A16DBA84BD509AC4439044C737AE7636494B93ACA72FDF1547E9C88D769B3C3616DC189EDD09F54F80F577EA5C7C80F4CF56A8F811BA7432694B<br>0DB29E9F42620ADF73A577D97366DE8FD2311D175CD262CFFC49C2D920D66E8E04420F8C00CC07BD689C1039278E59679ECE9D9C9DBD2C78DD55572ED63B<br>28F2744297E9CB986DAA3F9DD4055E8D8867E17301F91AC58749C249D1673F8723FAF66AF400B3C0414ED72DE73E65F5BC13F26DE43529174FAC00B7304A<br>7142B3167E6AAD5CB1AE9682517B938446B1C7A4F7DED1A6E100055B7C9B8A10C519FA564AFB8E8DF29B2750961E8C639B20D4613BCC0EF929ADFFDE729B<br>744934D751BD34913E668ABD82C92B8D1EAC19A74D6C53AD379457AA5DB825C8476BA3FF517EEC4BAA92A4654B99DB5E88C79B880B7EC648882B0EAA14E6<br>B0C94F1584B2508A9B7CE06BE927D7B5508AF665527CAA68BE4CC7080AC54F260DF11E56157E57B365FD06FA5312F8840DFEB0C93A6136FF015160376591<br>CE571F3212FBA05BFA63C290D511150B7ADA88184AF476F9C30109C772B6DD8130D4DF685E1C3E1BC8BEDBCA4355DEB5EEFCC3ECA8B229EE3639D0BB4A35<br>DD943B8E4C1BAE460E85BA23DC76</span> <br> <!-- !!! dont changing this !!! --> </div> </div> <!-- --> <div class="tabs"> <!--tab--> <div class="tab"> <div id="tab-content1" class="content"> <div class="text"> <!--text data --> <b>/!\ YOUR COMPANY NETWORK HAS BEEN PENETRATED /!\</b><br> <b>All your important files have been encrypted!</b><br><br> <hr> Your files are safe! Only modified. (RSA+AES)<br><br> ANY ATTEMPT TO RESTORE YOUR FILES WITH THIRD-PARTY SOFTWARE<br> WILL PERMANENTLY CORRUPT IT.<br> DO NOT MODIFY ENCRYPTED FILES.<br> DO NOT RENAME ENCRYPTED FILES.<br><br> No software available on internet can help you. We are the only ones able to<br> solve your problem.<br><br> We gathered highly confidential/personal data. These data are currently stored on<br> a private server. This server will be immediately destroyed after your payment.<br> If you decide to not pay, we will release your data to public or re-seller.<br> So you can expect your data to be publicly available in the near future..<br><br> We only seek money and our goal is not to damage your reputation or prevent<br> your business from running.<br><br> You will can send us 2-3 non-important files and we will decrypt it for free<br> to prove we are able to give your files back.<br><br> <!--text data --> <hr> <b>Contact us for price and get decryption software.</b><br><br> <a>qd7pcafncosqfqu3ha6fcx4h6sr7tzwagzpcdcnytiw3b6varaeqv5yd.onion</a><br> * Note that this server is available via Tor browser only<br><br> Follow the instructions to open the link:<br> 1. Type the addres "https://www.torproject.org" in your Internet browser. It opens the Tor site.<br> 2. Press "Download Tor", then press "Download Tor Browser Bundle", install and run it.<br> 3. Now you have Tor browser. In the Tor Browser open <a>qd7pcafncosqfqu3ha6fcx4h6sr7tzwagzpcdcnytiw3b6varaeqv5yd.onion<br> </a> 4. Start a chat and follow the further instructions. <br> <hr> <b>If you can not use the above link, use the email:</b><br> <a href="[email protected] ">[email protected] </a> <br> <a href="[email protected] ">[email protected] </a> <br> <p>* To contact us, create a new free email account on the site: <a href="https://protonmail.com">protonmail.com <br> <b> IF YOU DON'T CONTACT US WITHIN 72 HOURS, PRICE WILL BE HIGHER.</b><br> </div> </div> </div> <!--tab--> <!--text data --> </div> </div> <!--tab--> </div> </div> </body> </html>

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker Payload 2 IoCs
  • UAC bypass 3 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 5 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.

  • 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.

  • 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\58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a.exe
    "C:\Users\Admin\AppData\Local\Temp\58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a.exe"
    1⤵
    • Modifies extensions of user files
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1936
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:5064
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1520
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4564
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:3488

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    669KB

    MD5

    419ee6eb592f5a59f536f28106c1a4c5

    SHA1

    da865c98e5b93f56b4e63541042740786ccc6fe9

    SHA256

    58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a

    SHA512

    85e469f727628ea30a3a3f775686e45b9b77bbe18516fc83be1d1b5ea1e0347d9caf59048ef9dd364f9f73696766d5b113162c2598c19301864769cb0b362199

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

    Filesize

    669KB

    MD5

    419ee6eb592f5a59f536f28106c1a4c5

    SHA1

    da865c98e5b93f56b4e63541042740786ccc6fe9

    SHA256

    58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a

    SHA512

    85e469f727628ea30a3a3f775686e45b9b77bbe18516fc83be1d1b5ea1e0347d9caf59048ef9dd364f9f73696766d5b113162c2598c19301864769cb0b362199