Analysis

  • max time kernel
    4294188s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20220223-en
  • submitted
    05-03-2022 15:14

General

  • Target

    7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc.exe

  • Size

    678KB

  • MD5

    6e93e386a9d39efe3033bea964f20353

  • SHA1

    c3069630d1ace693e65fe5a9394a06c415ff4049

  • SHA256

    7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc

  • SHA512

    62dac0e9c3c92cdfafe3f27c73ad2277af4b14adeac8334c1f6c7d3346b30b10889d2d5f6c4216427a7cfaa7a2d9ed7aa57d5ea9336fea2110acbcef9daa72a4

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\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;">05BD6FC5944334C8247B10F15ABA464837100E6927E67B74D7436C2984138CEB2C0C6F54CAAC9088F8C6C13B6FC23CEBAE05B087991D6DCD6C5D78516B593CF5<br>451C929C6E1D54A75722E44D2350428B9C5CBAA3C89A7DF24D36DB2B095E0C1C19F997ABB3701E4A5BC12205EE52425984B24B75FBD6F4F992C071DDACF8<br>87157568F4AE40E84EB8994555E328336DC6F507272C4D7CD2FBF303087195C3833699882B51FA2DA27B6F2496EC06282BE15ADDD26196BFF74941548225<br>4426EBCEA9D3BABECA85AB32B13C1DF30D8F5817DBB61C8C6FC716EF9EFFDBB5A118291A56DC09D259763893605C567AD856F35F4C53A217EB7A420E2F23<br>1136CF73C72A6BC9A56B6AD22ADF9475F6C9C3F011BB2B71C18CF6862B8524314FBEE9D80553A8BC29ED4A1464372A912B785CE704B7C84089C6CB63EBDC<br>F9581A1414155D784C212C77DCC348759C785C37AD0CC541CE4933AD4D2A20F0ABAA866ACB3B32C5C91A9026922561AE42642E8F631312B6B4FC93A3B9A9<br>EB78603F30104CE9090233F55C3600EF203E62A7D35C283E48EBA63339EA79A4561E0A7F1114658A2B5710F9D61216AAD49FB62889CFFE32E98948AE11B7<br>443B16E10D56EFE0BB63885DD38D23748ABFE9F26A1228C856B42994CBBEF1A64F22BBF74B22A1A6AB029C3E4882916775A49BF1060BBF4C4F73079846BE<br>A66E1287376883ED6E3E00716641</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/6-7qa33COWrn573pWMvPEVm07fTGeKlRAC-7gLXKx4i48XE9utl8RwAhdtLVgBRNdqy</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="mailto:[email protected]">[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

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 13 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\7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc.exe
    "C:\Users\Admin\AppData\Local\Temp\7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc.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:1780
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:524
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1364
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1072
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:976
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1540
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1144
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1380
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {4774149F-F843-4E3A-B03D-DBF254B89F9A} S-1-5-21-1405931862-909307831-4085185274-1000:GZAATBZA\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1608
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:1640

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    6e93e386a9d39efe3033bea964f20353

    SHA1

    c3069630d1ace693e65fe5a9394a06c415ff4049

    SHA256

    7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc

    SHA512

    62dac0e9c3c92cdfafe3f27c73ad2277af4b14adeac8334c1f6c7d3346b30b10889d2d5f6c4216427a7cfaa7a2d9ed7aa57d5ea9336fea2110acbcef9daa72a4

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

    MD5

    6e93e386a9d39efe3033bea964f20353

    SHA1

    c3069630d1ace693e65fe5a9394a06c415ff4049

    SHA256

    7e0ea386a2070051c3a05ed4115a6c99d5b626ba328be7f171ab74ba2f6589cc

    SHA512

    62dac0e9c3c92cdfafe3f27c73ad2277af4b14adeac8334c1f6c7d3346b30b10889d2d5f6c4216427a7cfaa7a2d9ed7aa57d5ea9336fea2110acbcef9daa72a4

  • memory/1780-54-0x0000000075BE1000-0x0000000075BE3000-memory.dmp

    Filesize

    8KB