Analysis

  • max time kernel
    148s
  • max time network
    126s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    12/08/2026, 14:21

General

  • Target
    99a72b56725196298391f3d52b8536b018aa8b60d97c443161e912430079ed30.exe
  • Size 669KB
  • Sample260812-rpgrcaaj2w
  • SHA256 99a72b56725196298391f3d52b8536b018aa8b60d97c443161e912430079ed30
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Path
  • C:\Recovery\WindowsRE\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;">CBD335727E2C353F2C6564BC74E015D6A96F939234D4386FF91B5C0842C1E96A0CA56E93329616A97C8FBAD30DDF76FD20D99D73ADBA6C154B24658EC110A0A0<br>DB9EB295FCE8F672431D53F2D8F59A3E415733EA63D24C6E22EA37F55A907C2D17988B2CFCD75AE8A9F70BE3F45B39145C1B79A0B745BA5105717A82A11F<br>7262A6FE25C56B69A37B3F501D8608AEEB5C6E84A0DF504B18A98BB6AF8886A1E7A59CA0983DAB137A1842594021927A96EEB86F8BA1030D02DE1686BACC<br>FC75A1CBF9A8946E66A7AF3CF485F731473EC0D87F56F338A498E35BC70257438C0EDEEB1977C1013DC308EF4D250A124CD47A37DA231FB7B55BEED7FF4C<br>267675814B132EA53737ED304A4671ED9EDC57B4A3A2C9CDAD9EA109311F7CFED07B669A5B0C8DC96C9B902F1CEDC8B652291AEF3ACEB2E74629C1751AA3<br>BAA170456C62EC2C7D2CAD1D58E3B51F3078C9F19A9384A00C40F0F43ABE55CF83DC4D3570DB8E8F88AFD90C12D66D393B8AD9E84EE0047D4FF2F4AA4072<br>0F12ACA75A9DA0E9604BB8634969DF6771BEA042E62B1D1DA1002D3C4D80A84435E0A569B49E0AB86C8752AE5C392B460822E47945FF56F2E038D3641F16<br>B81292AAD7E909F3DF86134C3DBB973B1F1F67F798D197295043B8EFAE86A3C4D68724ADAF5DF36D8E58F9C018326BECA35DADE38C68BFBC5F1EC255267F<br>0C6112FD3E61051157C7C9FA5976</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

  • Family: MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker payload 1 IoCs
  • UAC bypass 3 TTPs 2 IoCs
  • Renames multiple (224) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 3 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) 2 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).

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\99a72b56725196298391f3d52b8536b018aa8b60d97c443161e912430079ed30.exe
    "C:\Users\Admin\AppData\Local\Temp\99a72b56725196298391f3d52b8536b018aa8b60d97c443161e912430079ed30.exe"
    1⤵
    • UAC bypass
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2840
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4248
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5616
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2532
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5184
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    "C:\Users\Admin\AppData\Roaming\svhost.exe"
    1⤵
    • Executes dropped EXE
    PID:2148

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        HOW_TO_RECOVER_DATA.html

        • Path C:\Recovery\WindowsRE\HOW_TO_RECOVER_DATA.html
        • Size 4KB
        • SHA256 8aa0ead1c2abf54982b638f41335fffa1226c69eb5ecd2f8613014f5916a4951
        • MD5 SHA1 SHA512 SSDEEP TLSH

        svhost.exe

        • Path C:\Users\Admin\AppData\Roaming\svhost.exe
        • Size 669KB
        • SHA256 99a72b56725196298391f3d52b8536b018aa8b60d97c443161e912430079ed30
        • MD5 SHA1 SHA512 SSDEEP TLSH

        NTUSER.DAT.LOG2

        • Path C:\Users\Default\NTUSER.DAT.LOG2
        • Size 536B
        • SHA256 91bb6e352189c6ce1eb5b67f887ef4758d09e9264903b85247afa9b5367f85b3
        • MD5 SHA1 SHA512 TLSH

        NTUSER.DAT{96622b5f-7bdb-11f1-b23c-ee5cbaaceece}.TMContainer00000000000000000002.regtrans-ms

        • Path C:\Users\Default\NTUSER.DAT{96622b5f-7bdb-11f1-b23c-ee5cbaaceece}.TMContainer00000000000000000002.regtrans-ms
        • Size 512KB
        • SHA256 68aecf514652127f8d7013382a7639ed5f805b433f8b54ae0883409d1d1575f3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        desktop.ini

        • Path \Device\HarddiskVolume3\$RECYCLE.BIN\S-1-5-21-3797332335-34111092-3597280141-1000\desktop.ini
        • Size 129B
        • SHA256 e1b9ce9b57957b1a0607a72a057d6b7a9b34ea60f3f8aa8f38a3af979bd23066
        • MD5 SHA1 SHA512 TLSH