Analysis

  • max time kernel
    197s
  • max time network
    223s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-12-2022 15:05

General

  • Target

    fc0f65213e7ad5960378433efc55642c116c750e10cb881ed7297f361b6be7dd.exe

  • Size

    669KB

  • MD5

    489e246b8f55137cd70e4b2d718ff85f

  • SHA1

    444e3fd11ac385ab333db41420e5c4fd2e47a5ba

  • SHA256

    fc0f65213e7ad5960378433efc55642c116c750e10cb881ed7297f361b6be7dd

  • SHA512

    25301655af73d40156d5761883198e519887d6dd24c282602a43cba8d029e108a26a29fa9b99e80c559a2916e311a6726dfbe8ef43c75dac503a3d33fa8464f7

  • SSDEEP

    12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8DRKD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWMKrKe

Malware Config

Extracted

Path

C:\how_to_back_files.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; word-break: break-all; } .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;">374DF84E7534CA39513354FFE3BA9841D473A673C3D932F07C7B728D86C7731D1A0F8C8A0BDD0EA81D4014498AD4AE9EC0156396AAD2872D47F4C270707AA369<br>56C0B388FCCDDC90169A5B8227E5FBBFC96C0C4124DF9C40D96A08A60B63FB4F6DC9795E2777E126F32CA2142C80F1AFE4AF0039FD3E3EBE03C37D5819EE<br>8C4304F03E571AC118D6E29D3F0513A1CCA3CEACF5B83E2E20699C5146F79012FDB96AEC3643BD7C0651181525F7722618AE7F7AAE591B88D2E178F093F2<br>CA29B538ACD5CAA979395089A85927AFA78C759C1BD3659929ACBA8ACFA524565EDD30CB0660168D142D4ADE4280D0BF249B3E69595E3B7EB188639BCEC9<br>AC508BCC3959650ADAFD01F09CD3A68799ACA8775FA2F2EB27F6B2CF36D0B937BF7FD9DD294BE842A12FE740E3890449830F71DCCDF0D88E939771ECE280<br>B5941DD02FB4657B0B5DA03C86CE638F93A7FFF07D55C62DD1B8849A621A5FBC4FE6EB55DDF9E7DDA92B65846CBA58FB071EED994A75A97C185E821F33DD<br>EFC8B9599DCC7FD999C3A47E568C611BBE9AEFF09E9531BBE25E9C7473EE820E2CFBBC957B77F680774B236B99EC17D9B73BB2408BF86D5E7875DB650D6C<br>432C2ED54703C6CB87E9D1087E830ED766BE74855067FFE00BB08CE28576B52EA397C38B586D69F7BAF597D02F9DE7C44FFF41AFA2820C5C7B9512273E64<br>102EB9528CDDF5FC812D183C7B61</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 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 9 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.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fc0f65213e7ad5960378433efc55642c116c750e10cb881ed7297f361b6be7dd.exe
    "C:\Users\Admin\AppData\Local\Temp\fc0f65213e7ad5960378433efc55642c116c750e10cb881ed7297f361b6be7dd.exe"
    1⤵
    • UAC bypass
    • 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:4836
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4252
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3008
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4480
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:2668

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    669KB

    MD5

    489e246b8f55137cd70e4b2d718ff85f

    SHA1

    444e3fd11ac385ab333db41420e5c4fd2e47a5ba

    SHA256

    fc0f65213e7ad5960378433efc55642c116c750e10cb881ed7297f361b6be7dd

    SHA512

    25301655af73d40156d5761883198e519887d6dd24c282602a43cba8d029e108a26a29fa9b99e80c559a2916e311a6726dfbe8ef43c75dac503a3d33fa8464f7

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

    Filesize

    669KB

    MD5

    489e246b8f55137cd70e4b2d718ff85f

    SHA1

    444e3fd11ac385ab333db41420e5c4fd2e47a5ba

    SHA256

    fc0f65213e7ad5960378433efc55642c116c750e10cb881ed7297f361b6be7dd

    SHA512

    25301655af73d40156d5761883198e519887d6dd24c282602a43cba8d029e108a26a29fa9b99e80c559a2916e311a6726dfbe8ef43c75dac503a3d33fa8464f7

  • memory/3008-133-0x0000000000000000-mapping.dmp

  • memory/4252-132-0x0000000000000000-mapping.dmp

  • memory/4480-134-0x0000000000000000-mapping.dmp