Analysis

  • max time kernel
    127s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    24-12-2024 13:15

General

  • Target

    READ.exe

  • Size

    669KB

  • MD5

    5ec29d96f5fefb2d726f9e120786eaa9

  • SHA1

    3f8d050bd4e823b1f2c681856d1ae6d9007d5861

  • SHA256

    8ee1f51602f957fa82c7e9c0d834d28873307a0c576ab8c7cc99ca85fcf43b2e

  • SHA512

    e21682f2bfee29cd0c0765a10463b2f57bde5996fa367ee2b8b6f7fae9bf5703aec24319ddf2e33890b352331f8fedda41d79ff04ec8a881a6469f6bdba0d5ff

  • SSDEEP

    12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8DaKD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWPKrKe

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\HOW_TO_RECOVER_DATA.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;">E7D77B3AF89C29998F8CC439C1AB4866F653D9BA7838563A9B36738E3226C7C0CC0F432865D0F9CCB1931CE7D3DBE930E741E0A0D45E30ABD8861AF701DA92CF<br>5E95F699E95BEED46C6BE217B8991576496D40AB3319D9C5CA3BEAFD5A7B2EA1F1A91A089E1B72A82CE8CA41526F892DE65D92FCCEBBF51F842CE7DD50A0<br>C3ED1BFDF1A2C01EF5AE1024DE5FD89790D853209595EDCACE91DBFFD065350D041E2743CEBF467BF9CF09CCF516A1FC3C48C71930855EAABAF85389A0C3<br>34AA9AF91293AAB8BF439CD65500D7EED52396F8E350A839E4F693AC258F68D39A51E6D55F8E0305768DEC4864CDE68A6DB41C2553219E04B033C0CE24D1<br>CDC0FC10FC2CE0C43210C163BB155A1E2820CE44EC3F6C378CF9EB4B3332303646874675DBA508EB11D0BD9279070890FCD3D6E4FA959A00ECE323227A99<br>714E77280112B7E7AC9063819148BA8C126FB8049BEE7D027D1ED913D5BB653F2E04DE5D9176AF53281BF1DF552F5D0EF4A3F0BF79DB14DAEC71923A3694<br>F5A6A1F7A124B01274A950FA05514D267E410AF49A680D6B0668DED5225680B8B22566C38044C966E634E206E4C093BCF13227E4E599892ED1A0452812DC<br>DB0D9B7534CEDF3C0832766C73923006C2F2B228696A01210773542D54850E3FD22B5280E934B825A5FB4588C57916CDD162B67C6FE8B7FD220FF4DE2263<br>24DE40894BA2542F05C137368389</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>.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>.onion </a><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 free email account on the site:</b> <a href="https://protonmail.com">protonmail.com<br> <hr> <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 1 IoCs
  • Medusalocker family
  • UAC bypass 3 TTPs 2 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (260) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 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).

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Interacts with shadow copies 3 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
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\READ.exe
    "C:\Users\Admin\AppData\Local\Temp\READ.exe"
    1⤵
    • UAC bypass
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2220
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • System Location Discovery: System Language Discovery
      • Interacts with shadow copies
      PID:2756
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2768
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • System Location Discovery: System Language Discovery
      • Interacts with shadow copies
      PID:2780
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2664
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • System Location Discovery: System Language Discovery
      • Interacts with shadow copies
      PID:2608
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2600
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2692
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {9D70BD0F-0423-4A70-BCBD-1C949722C2AB} S-1-5-21-3551809350-4263495960-1443967649-1000:NNYJZAHP\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1088
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:1540

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\HOW_TO_RECOVER_DATA.html

    Filesize

    5KB

    MD5

    913f56b6b03654a32e261e18911b36ec

    SHA1

    9dca1dbf93b9e9f803d3e2e4a84eb107c37f7b40

    SHA256

    6033404d04e4f9af76c58ed32c54117897348fcf2c62ef1e5057a77b0efb9900

    SHA512

    390abd410971db6755e4bd02cdfb2e1e820ec4936a3c6777f8b747c744c8bb2c39eee43d87128f619b22331b3a34a4996e5c78a598d1ce98e162c438cd69f4a9

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

    Filesize

    669KB

    MD5

    5ec29d96f5fefb2d726f9e120786eaa9

    SHA1

    3f8d050bd4e823b1f2c681856d1ae6d9007d5861

    SHA256

    8ee1f51602f957fa82c7e9c0d834d28873307a0c576ab8c7cc99ca85fcf43b2e

    SHA512

    e21682f2bfee29cd0c0765a10463b2f57bde5996fa367ee2b8b6f7fae9bf5703aec24319ddf2e33890b352331f8fedda41d79ff04ec8a881a6469f6bdba0d5ff

  • C:\Users\Default\NTUSER.DAT.LOG2

    Filesize

    536B

    MD5

    b271994c2232f5a645d7c50ad54a809d

    SHA1

    596446bea241dad1260bba3a789b7910b19ca481

    SHA256

    3eb12ec39b208ec4cc6f661959d3f839ca7d1b997757581b24fc3ecb08a4a5ff

    SHA512

    11cb418146949375c7a19c2dff54aa5c241e26d6a10c96817a3bc969bc918e4e963f8c9cb422d7cd98bc72f567f1f7b1cd29db5c623d54a124d4b8c9f429a3e2