Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    05-03-2022 15:14

General

  • Target

    7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc.exe

  • Size

    678KB

  • MD5

    6e93e386a9d39efe3033bea964f20353

  • SHA1

    c3069630d1ace693e65fe5a9394a06c415ff4049

  • SHA256

    7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc

  • SHA512

    62dac0e9c3c92cdfafe3f27c73ad2277af4b14adeac8334c1f6c7d3346b30b10889d2d5f6c4216427a7cfaa7a2d9ed7aa57d5ea9336fea2110acbcef9daa72a4

Malware Config

Extracted

Path

C:\Recovery_Instructions.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;">CF5BA994408C756D772E6297886976D6E5B187D99D351291B6386C87161381B10925291E349C7797F296B0A0A2E921479FC9B26191364493127A4A2334FC8E21<br>1954CDD6740CE8CE13172660153C69780CA5698DB52CF275463A614F9111A210FE67530629A5A8D681CF5674489BE73AB84C48512F66FF3108BD8BEAB31E<br>2E66987E7E03898478D7FDF80A35CC7E2EC5C5229771652E2BE169336FA242E917B8336452B6C54C1E2ECB578AA961A534A0A0D14DDABD18947B3BA6110E<br>4F9F64B157E932C01F9FBF1BEBB7184C514272D2CB487981ACE069C3AE341117FE5C4D9DB05F060853D5DA4FDA0BE37FA21C72005ED4A9E00D9015DA1FC0<br>F7E548A2448C3496F882FC7903F38B6B1F1651C63C1E94B92E2DB3116528A750E82B910D690F958A565AFA5184AAC8B4727E100B1A6D9B5DF988F28043E6<br>4504565B9E93E04673915C078283D633FB91BE782B35AAE53EAEAF717E696B4BA8B67974DE6D29A5ECD9F9E1DC642618ED24E4BBDB006CD5DF28A961010B<br>DAE45F183CAB0573A8E410309E2A2750C9C820A2E4E1BCC6487668FA479F308446FE0EB0910095F5D700B8460B7EEF0CBA9845535E3266CC8AA656FE6F82<br>15B030525963942FFA6282800F164422C623751B6474EDAEA0AC9ABDA15745EB0C591F14C1CA3914BD4D923E441F572000D3B242B811ADE1ED051C5866A7<br>C1432159663D4301D47C0FBD9960</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>http://gvlay6u4g53rxdi5.onion/6-7qa33COWrn573pWMvPEVm07fTGeKlRAC-wJqW0F5adfgQh4572dBKbPaWiXxWS7fV</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 "{{URL}}". <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="mailto:[email protected]">[email protected]</a> <hr><br> <b>Make contact as soon as possible. Your private key (decryption key) <br> is only stored temporarily.<br><br> 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>
Emails

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 4 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\7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc.exe
    "C:\Users\Admin\AppData\Local\Temp\7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc.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:3508
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2136
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:380
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2988
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:240

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    6e93e386a9d39efe3033bea964f20353

    SHA1

    c3069630d1ace693e65fe5a9394a06c415ff4049

    SHA256

    7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc

    SHA512

    62dac0e9c3c92cdfafe3f27c73ad2277af4b14adeac8334c1f6c7d3346b30b10889d2d5f6c4216427a7cfaa7a2d9ed7aa57d5ea9336fea2110acbcef9daa72a4

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

    MD5

    6e93e386a9d39efe3033bea964f20353

    SHA1

    c3069630d1ace693e65fe5a9394a06c415ff4049

    SHA256

    7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc

    SHA512

    62dac0e9c3c92cdfafe3f27c73ad2277af4b14adeac8334c1f6c7d3346b30b10889d2d5f6c4216427a7cfaa7a2d9ed7aa57d5ea9336fea2110acbcef9daa72a4