Analysis

  • max time kernel
    172s
  • max time network
    176s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220331-en
  • submitted
    08-04-2022 10:50

General

  • Target

    dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13.exe

  • Size

    669KB

  • MD5

    3a43bb428e23e8059c9a3fbde9707de2

  • SHA1

    edbca9b297c2ce981bcb6c8a20107c204045d523

  • SHA256

    dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13

  • SHA512

    c02648de56128a758873952ffcac982bf4463bc9c7cab9605e2f0cf77eb4304e39a9076494f4127718356e4d5250084353b27459c40ae8f30ac7cb5150f2ae1e

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;">0AB63FC3ED09EF18487A66FCAE948C1E2001D9902F9477272BA087AD11E9696E6B1AC7A943BE3E5C185D22EE6D9496DB94199C960B5BD08843BB3D2CB65C89D3<br>C2E1781920F71336AF036F203E0406F9704E0BFE9C147E79CD3ADD0F7AF42C3FC088CBFFE96DAD8FEEC46B1C942080CB1CC5052EA2953EB55D9A755C28DB<br>DD7854175A8E2D38225674CA55713F604ADFE31E6A2A746022449976DCC93D452B82D986644387B86E74971D9A390F7EA34E2BC23D598F78D463010BC456<br>D0304097B005D6D613C84D36DF888792001BA8974C6CAD622E816C811D5E8B64291A84EE6B5EC373938C93F0C818D63E2EDC2F05788BF35EA78EC07A6C59<br>FAA8776D6801B68B375E9A22C5378B50AF006E369DA6B456FF17C0143794AF30644678BAEAF39F849DA89373A171C872DFF99D4935BA2C9D1F4A32E1A0C0<br>49992FC0AE8B07D0E3410F5986DFB12F706C15A39B5A114FE481B8AD08A471E74CB4852AD42D0019BCFDDDE0AA2CE0526778B5201E040FC7C4255A6263BE<br>701186566E85E24C19C33C95D25711BB1D902183309BFB5DADB4BA7746AAC2C467F5FFBB1A6E2478AA5ED1295012979595104D8A197109F1299703915442<br>F2DD83634190CC96FEFCA58DDB5AAD4B377D695DBD7ECA49EE2F2D30AED1D6FF3D12BC695B48FC791C2C14A5D1F9F613435E1072C5D8240600DE79F47644<br>560526A60E522D9FCBA39690A24A</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<br> </a> 4. Start a chat and follow the further instructions. <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> <p>* To contact us, create a new free email account on the site: <a href="https://protonmail.com">protonmail.com <br> <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
  • 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\dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13.exe
    "C:\Users\Admin\AppData\Local\Temp\dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13.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:1444
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4436
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1440
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2900
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:3284

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    669KB

    MD5

    3a43bb428e23e8059c9a3fbde9707de2

    SHA1

    edbca9b297c2ce981bcb6c8a20107c204045d523

    SHA256

    dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13

    SHA512

    c02648de56128a758873952ffcac982bf4463bc9c7cab9605e2f0cf77eb4304e39a9076494f4127718356e4d5250084353b27459c40ae8f30ac7cb5150f2ae1e

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

    Filesize

    669KB

    MD5

    3a43bb428e23e8059c9a3fbde9707de2

    SHA1

    edbca9b297c2ce981bcb6c8a20107c204045d523

    SHA256

    dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13

    SHA512

    c02648de56128a758873952ffcac982bf4463bc9c7cab9605e2f0cf77eb4304e39a9076494f4127718356e4d5250084353b27459c40ae8f30ac7cb5150f2ae1e