Analysis

  • max time kernel
    185s
  • max time network
    183s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    01-02-2022 15:25

General

  • Target

    dce7e1f59fa13d329154b3101c9f0ade725a5d799116fcc58f12682c91d2edba.exe

  • Size

    669KB

  • MD5

    7f80e4ae509570c739fb4e144b7fdce8

  • SHA1

    43d17c2de786e2865a9cbc8358a380c9ee2d3684

  • SHA256

    dce7e1f59fa13d329154b3101c9f0ade725a5d799116fcc58f12682c91d2edba

  • SHA512

    598b6d6af00cc56b208bfbfff4114f4dab6295a344e2ade6544290e237e5054775656be37dde3dce52ed86379851de59315a125c95707235e566d2fab8dcf590

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;">432CEB93DCDB14A4226B26E991D6BF1680E5864B9ADD9674AF891897FAB11318417D289D6E652ED5248B10184591DBB443C4F1C434DCA460B5FE97E717CF9D17<br>0A9D67FD48208F743C467330084B5FF5A8F9CC4CD5DB58B51FFE935DC077D5FC057007E6C3F01A02E70171D25E506F9246E617145B4CC548A12638B4EE41<br>23CC2616B723A183AAA166A3EF053BE30E2255CFC84E7ECF1359ED11EBE222C655677AEB2E81079EFC15E93A38BE970F285E727D4050D8A5D28EB743B09C<br>56257E7D9EC2769DF5ECEFA4FE8BE6AB8FD952119C749B34432D9E0C958B552B9DA85D3B59265C9EEEDB041095B6778F71C567CDE0B73E39EFBE4538D8AE<br>53C045F56533A9B008D49C3FF53BA464E26925B20B6DC17FEB68FCA4395E7BCDCD0FB4F7A1835AD0D57A4400B4F291139100409BBDC78CDB0C864AE0106B<br>32437521CE2EF9D6C4F01889C0135F619D76053D960EF6D6559B2A80874550C442F04B3F959E715A378FB967B476A5A944C382F7B1AE08511C4563E9B31E<br>1CB599C47C4AB9C270CE2BDBE781CB77EC67894197944E13C3ED1A968C1D1062CE9644E732151261644C7B6BE00E801EDCB27F59FFD6BF9B7EE7119ECC89<br>DF9104875C83F4CF63507C1ECCE04625F061BF383F9A157DEE2FECD7F4747B1316C78D627FFD51C7D5678CDE5CD922AFA788B696209BE4B2C7DC294458EF<br>E5DFC039FFF06B75444B4E9D6957</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
  • Sets service image path in registry 2 TTPs
  • 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.

  • Drops file in Windows directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies data under HKEY_USERS 41 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dce7e1f59fa13d329154b3101c9f0ade725a5d799116fcc58f12682c91d2edba.exe
    "C:\Users\Admin\AppData\Local\Temp\dce7e1f59fa13d329154b3101c9f0ade725a5d799116fcc58f12682c91d2edba.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:3720
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2648
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1268
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:480
  • C:\Windows\System32\WaaSMedicAgent.exe
    C:\Windows\System32\WaaSMedicAgent.exe 356195f0bd035a622ffef58b6675b8d6 9eDb/zuB20aCDaFDAt6nww.0.1.0.0.0
    1⤵
    • Modifies data under HKEY_USERS
    PID:1168
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:2212
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:1976

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    7f80e4ae509570c739fb4e144b7fdce8

    SHA1

    43d17c2de786e2865a9cbc8358a380c9ee2d3684

    SHA256

    dce7e1f59fa13d329154b3101c9f0ade725a5d799116fcc58f12682c91d2edba

    SHA512

    598b6d6af00cc56b208bfbfff4114f4dab6295a344e2ade6544290e237e5054775656be37dde3dce52ed86379851de59315a125c95707235e566d2fab8dcf590

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

    MD5

    7f80e4ae509570c739fb4e144b7fdce8

    SHA1

    43d17c2de786e2865a9cbc8358a380c9ee2d3684

    SHA256

    dce7e1f59fa13d329154b3101c9f0ade725a5d799116fcc58f12682c91d2edba

    SHA512

    598b6d6af00cc56b208bfbfff4114f4dab6295a344e2ade6544290e237e5054775656be37dde3dce52ed86379851de59315a125c95707235e566d2fab8dcf590

  • memory/1976-158-0x00000258F3060000-0x00000258F3064000-memory.dmp

    Filesize

    16KB