Analysis

  • max time kernel
    154s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    01-02-2022 15:20

General

  • Target

    fe81214e1c83415f949d3389e7f6c6ed9508db2c6d38f34d5386fc49c4ada9c7.exe

  • Size

    669KB

  • MD5

    74393d9335e16594b3f40c8b86d9e9fc

  • SHA1

    02b1e97437d21e7e8999b12d51113df1b968cf4c

  • SHA256

    fe81214e1c83415f949d3389e7f6c6ed9508db2c6d38f34d5386fc49c4ada9c7

  • SHA512

    4b6d65c9ce1173438989688947aec91ee00ea71391a1ad1516da319b377dd3b97bc95f020894df19576592f6d10f91ea9719bbec1f0a49b51f48ae9ff1700952

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;">61B93145AD1A00617987EA9970FF3B6856F7ED95237D4434EC27E82F13792817E78E26252001CB11DD517E7EF1BD94DAEE1E169454C0D353998EC582ABD6C263<br>D739E163FC8528BB134617BE03AA43E320088577D1142266C9FE07E81924ADEB236002C824C475721E62A561ED2E6E1E923958E24BC2192E0DA299895133<br>95E4CFA619B3EAE8F8A9D945FF29A29A8A2F48BE6A19DD3B7792ADC53F2FF3498390FF9E9432C6FFCE8AC75DAF2288E45CF28130FBE382CA64B76AF5BDE7<br>6A89AA86D71D75B2FF06701D55C4065A08C60BA13CB5BF685CB2655199D2713A9EC94ECF4BE95C8908F9FEF6AFFFBEF950EEC3E3D599A4439AF41CE17FC1<br>6CE8752C58382C77C906E228DAEAF0696B1F3D6CD77D8957B0581AEEF8933245635FBEDEA9FB8FA79EF41A6D63A5CAA3D91DA3F3BADD28850091B5961F60<br>148C11E60E239568215A0EB626A02B894EC4B76A0B90435B6D68FC280ADD401DB2FA47780A1527FAA4811D3F28813BCC37AC30B53820F396704BDED99564<br>67A6C2E32F3C50D0B283A7E93C3F93C3E918CD2212299976B293A99118935FF9DBA0CD95ECC0A216094B63198CBCFE568C05C891CB90A98B452C7C4FE955<br>2FE41C254B64DD6D1658249B42D3005C9386E585DF5231CC5473DCE71870BF31815478A4537473E4F82BB5513227CA544A2A677B423EC30D924E881C0DAA<br>EC29E1EB9B3A9594BD3882FDC440</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 </a><br> 4. Start a chat and follow the further instructions. <br><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> <b>* To contact us, create a new free email account on the site:</b> <a href="https://protonmail.com">protonmail.com<br> <hr> <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 7 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\fe81214e1c83415f949d3389e7f6c6ed9508db2c6d38f34d5386fc49c4ada9c7.exe
    "C:\Users\Admin\AppData\Local\Temp\fe81214e1c83415f949d3389e7f6c6ed9508db2c6d38f34d5386fc49c4ada9c7.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:3704
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1684
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2452
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2652
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:876

Network

MITRE ATT&CK Enterprise v6

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Downloads

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

    MD5

    74393d9335e16594b3f40c8b86d9e9fc

    SHA1

    02b1e97437d21e7e8999b12d51113df1b968cf4c

    SHA256

    fe81214e1c83415f949d3389e7f6c6ed9508db2c6d38f34d5386fc49c4ada9c7

    SHA512

    4b6d65c9ce1173438989688947aec91ee00ea71391a1ad1516da319b377dd3b97bc95f020894df19576592f6d10f91ea9719bbec1f0a49b51f48ae9ff1700952

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

    MD5

    74393d9335e16594b3f40c8b86d9e9fc

    SHA1

    02b1e97437d21e7e8999b12d51113df1b968cf4c

    SHA256

    fe81214e1c83415f949d3389e7f6c6ed9508db2c6d38f34d5386fc49c4ada9c7

    SHA512

    4b6d65c9ce1173438989688947aec91ee00ea71391a1ad1516da319b377dd3b97bc95f020894df19576592f6d10f91ea9719bbec1f0a49b51f48ae9ff1700952