Analysis

  • max time kernel
    161s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01/02/2022, 15:50

General

  • Target

    1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de.exe

  • Size

    678KB

  • MD5

    7e3a815830adf98eaed4b5289dcb5dae

  • SHA1

    4948c8419d64a342242b8765ab443fbdee63c95f

  • SHA256

    1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de

  • SHA512

    9f1347e33e67595d9d7506686f92cd6963e7c161e7c9300fdaddc2488ae763911914bfab3eaaa49e9887890eb6568c6ba46c152fcc8349259584531ef9fe638d

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;">573DF33689FBB9724EB18145E33E692048A35AB492D1072EFAAF38B4511449E2026FB8EDC1F67E640B1094AADCC75738DD2D0F56C6C1B597C21AAE4A9373BDE4<br>C2E209DFF3894DCBA2581AB1901BB04E6A78AA1771B34015AE5A7A1AAEC159C6B2EC4B6F6CFF093A9F0FD3B2AA4F1E675F274EEDD453CE902D0F6A54B050<br>DE1FAA0BB5A6B941957A9FB6B0628F55694745C89127CC8E5AA57C582F90E9FBB649BAC1F88B9DC3C869815487B7CB192DB74C2809A97B189139CCB83774<br>6EBF9F2AFA4C9284C4ADE1594D08E34301BCF408182DAFD9DD9BF62F017D9B4AFE1E920F06E9924A260D71F2C51930BA2132B26ED9F4BB9C0C45CEA712A9<br>10463C315B9B68BDD87CC034D8FBD0E98AEFD67B50A9E1CC166748A4DB8837CF210FB93EBF4734AF7C9A0BFCC4F9C9FD1743B3766FD5F2D9BD73A9EE96C2<br>0822C25411C2F2405D0BE389C067C119BC722A61D8067712084B7AB14A67CD76C2DB5C0A526DBDDBF4503F28DF3C0A18B4A7B7DB46F02BB267B0A8DAA259<br>FA3124858319FC8C10A0D7987EB9487A902A066D0DD2ED3DC82FDE8A3A37D44141D28DCF0FF94C887ABD211E972575AF7674501AA53CCBD1BC9A67C5BA65<br>8A897B13BBED7EA8021C067414CF44A99C1A80C8E0AE27D6A351A7FF1BF718DF323D3B8DDF4946A356E14106CED61BBE7D12537D801D138DDF64CCA430A0<br>9D63A1F99626D95DE894359EED6C</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>http://gvlay6u4g53rxdi5.onion/21-MvMs8OxF0c1YkQrv0gQpCSQdGjNINb1Z-TUjeBRXBmW72xO6kRbTL1hFAsYIdxRk5</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 "{{URL}}". <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 mail on the site:</b> <a href="https://protonmail.com">protonmail.com<br> <hr> <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>

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 12 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\1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de.exe
    "C:\Users\Admin\AppData\Local\Temp\1e9ad19e577e8b44b77119c4e1bf842b513c813e4dc4d92b494c58b1478f01de.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:1088
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:576
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:756
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1836
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1632
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:988
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2036
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1760
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {656F0ADD-0FEC-4C9A-9BBA-CC25211298EA} S-1-5-21-3846991908-3261386348-1409841751-1000:VQVVOAJK\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1752
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:1740

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1088-54-0x00000000751B1000-0x00000000751B3000-memory.dmp

    Filesize

    8KB