Analysis

  • max time kernel
    189s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    01-02-2022 15:27

General

  • Target

    d33b09ddee82c5c439cb0c66e5c1dee9ad5259e912a3979b31c66622fb9d47ea.exe

  • Size

    654KB

  • MD5

    ad182ac22ee9e8075a324fcee2038108

  • SHA1

    212e3254099967712c6690be11ae9d65a8966ffa

  • SHA256

    d33b09ddee82c5c439cb0c66e5c1dee9ad5259e912a3979b31c66622fb9d47ea

  • SHA512

    51aac8b10246f8ce9d3dbe34aaac2de1801b3fb121450dd00c6eb27b109d79cd931700becdcf5194c5f1316c39e91cda9c244abcc8772deea9d2da2519a1c838

Malware Config

Extracted

Path

\??\Z:\Boot\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;">2307C66A68C35EFF0E0D713BAEA63572017D76497476713519C6EADBE70DB8D1D4A2BEE1AFDDA3E1E282F813EBC6309E77C1F343CA9169CD8664E8E2229891B8<br>A41C7FD01434E35F78963694BE946D277F8D288607D77DFBEAC7B180F491D096FDBD7393C5B910FE71D07FC11EC65338C4C859B1A0DD01C543C48237E010<br>AB664C10A6AC1501159C0A726262BECAE3E5A4F9B514FFFA17B8FC6383C981614BD16172B72A59D8AD5401A58850FC27712BB40CD7BD89BED457332EA6C8<br>089340894054CD9C510B993C7D5B73711B718C897BB66B4EA38DF77689890B7AC6F3D446FF6201AA80C41A3BABF406AC6339B33DB7C789D20667AED3C783<br>4B1FDA2B978FA0EA61A168039A211A9FDE5E70E43395DFA86C822191A32DA566512E600F228303E58301821FB841635AF4ED441EDA93A5402A2EDE9185E3<br>B8BEF2D669C86BB17F9984EE6C21D015470C8FC1E5FEE594BC6911EB02DE958F47B563E38B3E5A105586F4C4CCCFC3A66A7EBBE73725C57CFDAF20E3C795<br>BD5CA7B751C25D7CAF7AEE9112CE2887E92938A841A596801F9D72A659A476FC60C957445AA135A04CEDA090B2342C74869FB915BAF34E3B8F44A64DBE18<br>CE28578C367A424B61BF4C4555047C0B2C136E35A9483198074E528B651E3EE4B5E9B1F33553B2B3B8572FCA61AE37D9BB4B24CF1C73478051BA2FCCC18F<br>A6775F2A3B5114EB1C47194E6392</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>[email protected]</a><br> <a>[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

<a>[email protected]</a><br>

<a>[email protected]</a>

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • Sets service image path in registry 2 TTPs
  • Adds Run key to start application 2 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 58 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d33b09ddee82c5c439cb0c66e5c1dee9ad5259e912a3979b31c66622fb9d47ea.exe
    "C:\Users\Admin\AppData\Local\Temp\d33b09ddee82c5c439cb0c66e5c1dee9ad5259e912a3979b31c66622fb9d47ea.exe"
    1⤵
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4592
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4912
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4944
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4532
  • C:\Windows\System32\WaaSMedicAgent.exe
    C:\Windows\System32\WaaSMedicAgent.exe 66d63027383764042b623dfb2b3a06da YduDj5TrIUWz4U/3pjPoQA.0.1.0.0.0
    1⤵
    • Modifies data under HKEY_USERS
    PID:1784
  • 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:5000

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/5000-173-0x000001A81AFA0000-0x000001A81AFB0000-memory.dmp

    Filesize

    64KB

  • memory/5000-180-0x000001A81E380000-0x000001A81E384000-memory.dmp

    Filesize

    16KB