Analysis

  • max time kernel
    156s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    01-02-2022 15:50

General

  • Target

    1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de.exe

  • Size

    678KB

  • MD5

    7e3a815830adf98eaed4b5289dcb5dae

  • SHA1

    4948c8419d64a342242b8765ab443fbdee63c95f

  • SHA256

    1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de

  • SHA512

    9f1347e33e67595d9d7506686f92cd6963e7c161e7c9300fdaddc2488ae763911914bfab3eaaa49e9887890eb6568c6ba46c152fcc8349259584531ef9fe638d

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;">000BA4D6365EBEB7B64FA798CCCC265F5B9BB43A129DFF43628C75406A911FAB80982B9E19305DC2649B11EBD3086122406C6FB011DE4F3AEF623D3F9987F8D3<br>C1818088710EACE1177345F30E3815AEE24086FEF1ED6044D209E11ECD324EDC475A2BAF68C7D63976FE5C0DEA9FF396A65D037E7F6B3A7D269F0B7CCB0A<br>3B3B6AD45FF7238E377378BA64617762AF39BEC576E94D6654D3476D7F3965226D83B80BE1AF9FB0F58C52FBA9E8D5FE9D4A73D230A915ED06A618D949ED<br>A54CC399DEE9BD957FD26C8762B215A817F3D13CC250A7874D0EE74D4CA2076ADCA4D71A798D7DFF2B392B29FCEED90E0261E77C543DB1E2D46C21340460<br>CAD925B397071AF8EE1A2F0B95DE999D4CE0844C68DA449789A72365325C71729425EC4837617F4906991A426F2AAEDD47C203EFCC3AEA9A90EAE74886D7<br>24D32CCA119661CBF75BFF43063F839AD9CF7A4B29D28CE9BD6EF155706E77E2943974B0C0379F0D0CCC398FB86CEDB7BBBC754B69006342F1490DC21EFE<br>5264271EEF2C6B58E6D11C4B5299F8186E1C47E1695196B595805EDDC9F4CB8CB5CB210A25DFF4F48C9C355967660C676FBE17AAE464B1A86BC0AF3A3CB3<br>2861CBDB74EA0818BA7444376777A6239DF66128EFC8A5E7010A6797F448EB9203F0AD2D7979EC50FA24FAC326A2C57177C230B68C2C461D08B9E430A6B3<br>92BE7C083F62A0C729227C2C5681</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/21-MvMs8OxF0c1YkQrv0gQpCSQdGjNINb1Z-cyqnDwV9uViNNLDwHOaVOeG8ubSjl5Yi</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=" [email protected]">[email protected] </a> <br><a href="[email protected]">[email protected]</a> <br> <b>* To contact us, create a new mail on the site:</b> <a href="https://protonmail.com">protonmail.com<br> <hr> <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>

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\1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de.exe
    "C:\Users\Admin\AppData\Local\Temp\1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de.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:928
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1384
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3384
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1008
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:780

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    MD5

    7e3a815830adf98eaed4b5289dcb5dae

    SHA1

    4948c8419d64a342242b8765ab443fbdee63c95f

    SHA256

    1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de

    SHA512

    9f1347e33e67595d9d7506686f92cd6963e7c161e7c9300fdaddc2488ae763911914bfab3eaaa49e9887890eb6568c6ba46c152fcc8349259584531ef9fe638d

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

    MD5

    7e3a815830adf98eaed4b5289dcb5dae

    SHA1

    4948c8419d64a342242b8765ab443fbdee63c95f

    SHA256

    1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de

    SHA512

    9f1347e33e67595d9d7506686f92cd6963e7c161e7c9300fdaddc2488ae763911914bfab3eaaa49e9887890eb6568c6ba46c152fcc8349259584531ef9fe638d