Analysis

  • max time kernel
    180s
  • max time network
    195s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    01-02-2022 15:24

General

  • Target

    e27a14af114438250721bfe21505ed32d78d4b03bd1365a39adfccd0394f5fe8.exe

  • Size

    669KB

  • MD5

    1f3548a95dc40f450f7188c943e568d9

  • SHA1

    d5b46eb0c5315518b7f5dc35b5293e1d5256b7f0

  • SHA256

    e27a14af114438250721bfe21505ed32d78d4b03bd1365a39adfccd0394f5fe8

  • SHA512

    8d07e51439e057265a0caa39c0ce358ede6f9ba0eb3f8c063d1a3f0a575749fb5453f2c3ba83748ca6b86d0ff30fe3f1139cfdabaeec7aa81bf92694e30c277e

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;">C09CBB705891FF22A95F90AC35F8B63E0C973ECFC949770E91EA2E9FDEF4BFB15FEE82F81E95860D549D12EDF3737AD6DE170DA26EA2EF891635FE1AA9C2AD80<br>64800DEC2B8CC98CFB8DE096A722924F4902DD806A1A3EC87C274212C4056A054B8E0B03503C8E3B223BFD59427AD53CF9043A0D8C983E6ABC6E6715C9AB<br>B0E73E1B8D0B5318E90C464816C5B19153B938501133BD3B6D95EB2621A153491C1F8DE3FAC3F6FFBD7E86028785DC0A7A5770167BEB33FC95EBA79A41D2<br>D942BE604E02B8DB6D6F8B49DE153191F054AEC7B555545A3ACAC9C75C9D7A101F6092343398EDBC99E73633FCC5CA25DAA28B39849CF4ED1B4C4B56FBB6<br>A1F989A4314438A235595F1874252AE70146A93CCDB1F083689EC9A003D12BA9C51AFBC0BBC82CD783D597A7BC9A781057D6B5F2D130628714E6E3BECF4D<br>1123441BCA323870C288B1D7C706F8A681319CC040E051FA62D4915AC84B23433087603386463CCDF10447A6FFBE46087138FC6B97F32085AFCFFEAB2104<br>F4D1C0D5379D56383B1A80B70593DEF381CB77B37873154F91A5998D18FECBF904F34EDC25C491DB2CD761FB30E30E70FE7FB1F4183496B77DA32D4D4072<br>7D15D75AA4F315445856A972F46CE8DF1FE5291DF7FF270765E4CA03E2C1D72D54CEBDFF081D241DE47D2253DABBA053742E7B1DE9165A9B9C8642B39312<br>5161B19DC01428FADD0582434B19</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
  • 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\e27a14af114438250721bfe21505ed32d78d4b03bd1365a39adfccd0394f5fe8.exe
    "C:\Users\Admin\AppData\Local\Temp\e27a14af114438250721bfe21505ed32d78d4b03bd1365a39adfccd0394f5fe8.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:3884
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:400
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3392
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3288
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:2996

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    1f3548a95dc40f450f7188c943e568d9

    SHA1

    d5b46eb0c5315518b7f5dc35b5293e1d5256b7f0

    SHA256

    e27a14af114438250721bfe21505ed32d78d4b03bd1365a39adfccd0394f5fe8

    SHA512

    8d07e51439e057265a0caa39c0ce358ede6f9ba0eb3f8c063d1a3f0a575749fb5453f2c3ba83748ca6b86d0ff30fe3f1139cfdabaeec7aa81bf92694e30c277e

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

    MD5

    1f3548a95dc40f450f7188c943e568d9

    SHA1

    d5b46eb0c5315518b7f5dc35b5293e1d5256b7f0

    SHA256

    e27a14af114438250721bfe21505ed32d78d4b03bd1365a39adfccd0394f5fe8

    SHA512

    8d07e51439e057265a0caa39c0ce358ede6f9ba0eb3f8c063d1a3f0a575749fb5453f2c3ba83748ca6b86d0ff30fe3f1139cfdabaeec7aa81bf92694e30c277e