Analysis

  • max time kernel
    176s
  • max time network
    166s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    06/03/2022, 06:51

General

  • Target

    8e32be81036161928f5bf24d75335bda797ca91dee0730c9c1b62d88f9c24f29.exe

  • Size

    678KB

  • MD5

    cd5e831586e171b130dd719e73e13f62

  • SHA1

    baf8da95632066364ff74df394bc2979c49e1993

  • SHA256

    8e32be81036161928f5bf24d75335bda797ca91dee0730c9c1b62d88f9c24f29

  • SHA512

    f4d615a45d45b3630c9d2840dec3cd710d3dcb68ed60e74248e0026c99c62f4c3fbb2ae2b354d6492cc2b18c1b6cbc6eea8137100a42d591b07d191184f33ee0

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;">7A4DBD3E0BEC56261C7180789DB28B7A5952949C468E4B105B5DD449D02381A7A068402B59936AB37E90BF09443F0818052E9F9FFA5D86EA19C1FA589B4AFB71<br>AFCEE0DB8E3B5C9668488CBF1499E3E9424178B25F075A9180536B3A85950863CF3F93314823DA48EF75A8A03DC4D7DC0A1851AD8B7185661C706A11F2E0<br>D38A26DFDEB6B7A4A68A647450735F382F5B2EF72C09E6669B70EDD98C09A1F4C6C6B2FE62A8ADAF3374025B16D0E462516E63E013F4A8523F1FA1D0A909<br>247924798DF58EF92354DF7184F9009A20AD87E0E45D6A82AF6D78D88EAC3FBEC07C9B6A6B397DC3EEB74D98A0E85C2C52D71C30FE550F7468081C8CEC6B<br>3A0CAFCC7F4DD51B6911E4F6AEA386D31B39C5D37BD41526B5E550B207216CB8A62C367D3B68DB362CDCBB3669F1359D6A2BB2DD88C519D69502699C5CEC<br>2DCAF2770E9FE3EF4023BC9DC1B2CDEE585563591020467808361950DA3B64943B4EF50E042B545B4F74225C3AB5056CEA8338FD1540937D635CBED9DE30<br>22AD6AE7B2CAA5F5D5F367556330A6A2E9FCF5920B8FE1403EE9A7276351832CA836C3E2E8E6D258F6B22FCA1C4FA0059D579E64AF0CA0D9C48B788E97BF<br>DC4E0292CA63684754FD3B09019F952C6631DB5B9E0995D3782D9EB25BE0A64420A672730135506120A333AF5184184A7132234FF308380DAEE05F287CBD<br>AF58F1F3C65ED192E761CDC7C31A</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> YOUR FILES ARE SAFE! JUST MODIFIED ONLY. (RSA+AES) <br><br> ANY ATTEMPT TO RESTORE YOUR FILES WITH THIRD-PARTY SOFTWARE<br> WILL PERMENANTLY DESTROY YOUR FILE.<br> DO NOT MODIFY ENCRYPTED FILES. DO NOT RENAME ENCRYPTED FILES.<br><br> NO SOFTWARE AVAILABLE ON INTERNET CAN HELP YOU. WE ONLY HAVE<br> SOLUTION TO YOUR PROBLEM.<br><br> WE GATHERED HIGHLY CONFIDENTIAL/PERSORNAL DATA. THESE DATA<br> ARE CURRENTLY STORED ON A PRIVATE SERVER. THIS SERVER WILL BE<br> IMMEDIATELY DESTROYED AFTER YOUR PAYMENT. WE ONLY SEEK MONEY<br> AND DO NOT WANT TO DAMAGE YOUR REPUTATION. IF YOU DECIDE TO<br> NOT PAY, WE WILL RELEASE THIS DATA TO PUBLIC OR RE-SELLER.<br><br> <b>Important! Emails from us may come to you in spam, so please check your spam!.</b><br><br> <a href=" [email protected] ? ">Your files are uploaded to the cloud. if you refuse to pay, we will put your data up for auction </a> <hr> YOU WILL CAN SEND US 2-3 NON-IMPORTANT FILES AND WE WILL<br> DECRYPT IT FOR FREE TO PROVE WE ARE ABLE TO GIVE YOUR FILES<br> BACK.<br><br> <!--text data --> <hr> <b>Contact us for price and get decryption software.</b><br><br> <a href="">http://gvlay6u4g53rxdi5.onion/8-wnO3bDcxIf8DcvdLyfIYTpkXq8pHVAOt-hpbJ4jkalDTXRjGLiFYuEPE9UL43Teiu</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> <b>If you can't use the above link, use the email:</b><br> <a href=" [email protected] ? ">[email protected] </a> <hr> <a href=" [email protected] ? ">[email protected] </a> <hr> MAKE CONTACT AS SOON AS POSSIBLE. YOUR DECRYPTION KEY IS ONLY STORED <br> TEMPORARLY. IF YOU DON'T CONTACT US WITHIN 72 HOURS, PRICE WILL BE HIGHER. </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 2 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\8e32be81036161928f5bf24d75335bda797ca91dee0730c9c1b62d88f9c24f29.exe
    "C:\Users\Admin\AppData\Local\Temp\8e32be81036161928f5bf24d75335bda797ca91dee0730c9c1b62d88f9c24f29.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:1644
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2564
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2724
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1288
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:4956

Network

MITRE ATT&CK Enterprise v6

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Downloads