Analysis

  • max time kernel
    164s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01/02/2022, 15:27

General

  • Target

    d33b09ddee82c5c439cb0c66e5c1dee9ad5259e912a3979b31c66622fb9d47ea.exe

  • Size

    654KB

  • MD5

    ad182ac22ee9e8075a324fcee2038108

  • SHA1

    212e3254099967712c6690be11ae9d65a8966ffa

  • SHA256

    d33b09ddee82c5c439cb0c66e5c1dee9ad5259e912a3979b31c66622fb9d47ea

  • SHA512

    51aac8b10246f8ce9d3dbe34aaac2de1801b3fb121450dd00c6eb27b109d79cd931700becdcf5194c5f1316c39e91cda9c244abcc8772deea9d2da2519a1c838

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;">A5D29E13E91867E71E41CF129A6ACA17C645879AB2AEBD73F19F518C1014D619B86AAB79E6D2D2CFE076F40AB2307FA3300EC621EA716D07B44A7C8981DF1822<br>731FACCB731F0B759C689E7B5247E3B9B50CB6EF251D471ED068F8207D277E291FC5C5B204DEABD9C31A07AD88CD1ABD2BAB7CD153AE4897ADFE3594EBA6<br>C7540B166DE34381C1348B785F3F7ECFAFD0E7CA6C791F93448991B2D384879C1D5392B86AFFBF23380C705B7B03C20E7EFF8A6D13C9E89C0097A684DAD2<br>95449CC299FC801FD65C4ADBA50623A66D52E9B7A60F1DEF5BCA463440F655037A77FD5A0970CCE40DB08ED9522B0184FA45B4A5284E87EDFB6CC9206B25<br>38D8D564613E13E447E88F3CEF7D6144C3EF105586CC4BCCFECD63296918F27300A5E2D3CD279A4A484122E717131A12E5742E7B558E87252EE0027CCB45<br>A4C891CC350997BF0600C0C41EDDF8DF639C07A9865846487CCC52C6638D7266EF07A179D96962EBD8555F7C0F1115A3A88018926F1DB5F9763542CD20E2<br>C89C796E75FFEB4B82BF5786BC5438011356EF46DD9457F32B5E64F7F29CC3DEFDFAB73ABE859784ACC1C802F7933002648B2A6C1929D246952CA43999AF<br>5D5CE5235D09436093707BFD8D41A5FDCE6BCF032F1CA3643561F51DD7B3677472948899FBE8F8F7FA01C879A580D6AC79308293E832CF13561E4508925E<br>6DF93FB585AFF09CE2E7803DD97C</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>[email protected]</a><br> <a>[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

<a>[email protected]</a><br>

<a>[email protected]</a>

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies extensions of user files 4 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.

  • 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.

  • 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 29 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d33b09ddee82c5c439cb0c66e5c1dee9ad5259e912a3979b31c66622fb9d47ea.exe
    "C:\Users\Admin\AppData\Local\Temp\d33b09ddee82c5c439cb0c66e5c1dee9ad5259e912a3979b31c66622fb9d47ea.exe"
    1⤵
    • Modifies extensions of user files
    • 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:1468
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:760
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1604
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:844
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:964
    • 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:2044
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1748

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/1468-54-0x0000000075CE1000-0x0000000075CE3000-memory.dmp

          Filesize

          8KB