Analysis

  • max time kernel
    181s
  • max time network
    163s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    01/02/2022, 15:50

General

  • Target

    1e406ec30ce6ff9998b5b1ad72232713832889e32cc890c807386831ee8dea9f.exe

  • Size

    662KB

  • MD5

    9148e0f611793ed63f4348501b3f3f9d

  • SHA1

    47b8bf8860f7c5d4c25cad24de6ab6cf525fa74f

  • SHA256

    1e406ec30ce6ff9998b5b1ad72232713832889e32cc890c807386831ee8dea9f

  • SHA512

    4f78d1dbbf70c044e86d979d646df26d4868297ffe7d59e2769bbd291c9b41a344e1d97b65bfbf74b012b39aa7cc41e0cd19003ca04e05a6572f7185023386ad

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;">296FB0C323860AA65BB9FAC1488FA45C043C07FE9D52539FCEED4226C81E7F5AE532F5F9F26836B9E00D92D3B1358984180197D0E8717C6E4FB17FE67C52F715<br>2F87EE5AA71202AA09C293B9228868F6C134D372F7AF3ABBEDDBE6D506827005BDFA720E524AB715DED06622400A573490774B67191803B74AF49B9E1C11<br>545A34A4D595A4B38FABAE246748F2D853953F904A17AE46ACDD1E6577D1D64367AD6CD5AB61D9EB3AF600CD0B7F6BC721DB1C85DB9506E345DC688C61C6<br>DC47636BBECA7203F50009BD284341080577510930E42EEC837D91BFF68E06C51E8D785A06F5F610A03814AC9DE9D2BA90339B3A3F03ADCB6E665F7BF915<br>155D18F52E907A5E5E70E925C05B9705AA1978B7C7E07693C9C692597341D264DF9A9FC73CA65D2614A369379E9469B79E3D18963B4927224B7EBB35D5B4<br>3DF3719B24311F1156038C479FAF45B1EB658E97AE47A4D08BD20C3997E9EFBF7E1BF806EC422FF99D412C1D906EC8AB8CF71F6497CC39620D760B6D1265<br>9BF6BE0149D4F37CA7315F6EF32C72C98190F125CB9096EC7649BCB2E75DB1DA44E134D5A6A0D391D630F78AC5F44758F92D6ED62D2130886E8DC90408FE<br>7C2D0E7670E1D193F27240B1AF105E095B6510FFEDE146F9FA87E091A0E75C93D9D4C76B099A8CF59573ACBAE8F3D2BF5A040F3F56C4F8A56CD51CA29745<br>06D10F6FCF9649E94FA71115DA35</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-rmPFli0sjNORRCfXRDZs02u7XwAsjS9b-n8lQ1DaqfiV5DKBBdOaM4Cs6iOPnB56c</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.

  • Sets service image path in registry 2 TTPs
  • Adds Run key to start application 2 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.

  • Drops file in Windows directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies data under HKEY_USERS 41 IoCs
  • Suspicious behavior: EnumeratesProcesses 58 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1e406ec30ce6ff9998b5b1ad72232713832889e32cc890c807386831ee8dea9f.exe
    "C:\Users\Admin\AppData\Local\Temp\1e406ec30ce6ff9998b5b1ad72232713832889e32cc890c807386831ee8dea9f.exe"
    1⤵
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1916
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2716
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1444
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2160
  • C:\Windows\System32\WaaSMedicAgent.exe
    C:\Windows\System32\WaaSMedicAgent.exe 40f7cf32e8efe7209e01609db0410a3a X18VADYF3EirDh9ErzgbEQ.0.1.0.0.0
    1⤵
    • Modifies data under HKEY_USERS
    PID:1404
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:1044

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1044-213-0x000001E880440000-0x000001E880450000-memory.dmp

    Filesize

    64KB

  • memory/1044-214-0x000001E8804A0000-0x000001E8804B0000-memory.dmp

    Filesize

    64KB

  • memory/1044-215-0x000001E882BA0000-0x000001E882BA4000-memory.dmp

    Filesize

    16KB