Analysis

  • max time kernel
    152s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220331-en
  • submitted
    08-04-2022 10:50

General

  • Target

    58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a.exe

  • Size

    669KB

  • MD5

    419ee6eb592f5a59f536f28106c1a4c5

  • SHA1

    da865c98e5b93f56b4e63541042740786ccc6fe9

  • SHA256

    58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a

  • SHA512

    85e469f727628ea30a3a3f775686e45b9b77bbe18516fc83be1d1b5ea1e0347d9caf59048ef9dd364f9f73696766d5b113162c2598c19301864769cb0b362199

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-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;">5976B5BE72F3BD67D775A38290E590A5EA7385F27C912AC46FB3012596B19BB8AEC5FF60A7EF22383C29EC3AA66B46E1AAC56FBA57AFA8828D722BC95AFAE574<br>29E1C458EABF63CF357136908DB51C349863C1BA41339A3457A930CD4BB251278FA73122F41AA073F1E2B02EABA0F0773AC360B53AB01C8A969708E822E2<br>AF12191E855105870173BBA95E5E27B60111093B02ABACECEBAB3B9482E2C45E3942E74316E4437CE0D25E5528A30C81FBF6A2FFDFFEA4C333107739A572<br>90FC396067ACD96AC2F416EA7134BDE6FDAA3A9843D69341B516A448E7A0ABED70255F6E3FB327A2AEC4A250DDE04EA5456659411424254EF4438B9F3FBE<br>8C924A75B8A9F183190D9549469AFE7731920222A470DA72F1ABCEF30E43E219E30A637A2426EA5AD41F8119F9B44C645EDEBCFF7D4C9A4FF376BF144723<br>178849C5234A36EDD5293E4524308251EBFE2B04F9EC8287E450D8857ECBC823329F7A1F8C49DEA83CA7A46B532C156C749420DB3E7E664CE0C2CBC1B149<br>C53FD5C590F2EC716A84AE4F8272CE2E757206A0BE43A0606AE56C236B18BF5A9E62340926FF9DDC58E04E28FCDB5DB19762519CDAA7A7CF589311D876CF<br>4C95314A4DF218A70C997A609728865B68BA44032891E60A55F7DA68D91D4C0FF55815881928515E8D70A1A1F3F6BB8A36BE755F6D8CA82262A4789EE593<br>3E6B6160067E44E6F0B6BF8445A5</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
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 10 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.

  • Interacts with shadow copies 2 TTPs 3 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a.exe
    "C:\Users\Admin\AppData\Local\Temp\58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a.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:700
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:892
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1412
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:864
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:772
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1220
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1744
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1376
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {E81AA50B-C94E-4A4E-BDBB-0A5FB463EC98} S-1-5-21-3422572840-2899912402-917774768-1000:VFSHTLAO\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:680
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:1304

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    669KB

    MD5

    419ee6eb592f5a59f536f28106c1a4c5

    SHA1

    da865c98e5b93f56b4e63541042740786ccc6fe9

    SHA256

    58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a

    SHA512

    85e469f727628ea30a3a3f775686e45b9b77bbe18516fc83be1d1b5ea1e0347d9caf59048ef9dd364f9f73696766d5b113162c2598c19301864769cb0b362199

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

    Filesize

    669KB

    MD5

    419ee6eb592f5a59f536f28106c1a4c5

    SHA1

    da865c98e5b93f56b4e63541042740786ccc6fe9

    SHA256

    58a0db1ae0d7d8c5cb5db5e5a24fd1088b8029a4e51c02e7b77d400c17bcb39a

    SHA512

    85e469f727628ea30a3a3f775686e45b9b77bbe18516fc83be1d1b5ea1e0347d9caf59048ef9dd364f9f73696766d5b113162c2598c19301864769cb0b362199

  • memory/700-54-0x0000000075181000-0x0000000075183000-memory.dmp

    Filesize

    8KB