Analysis

  • max time kernel
    127s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/12/2024, 13:15 UTC

General

  • Target

    Build.exe

  • Size

    669KB

  • MD5

    b446b1c86f3d27bb39783f9d3a112a40

  • SHA1

    d9f66f8db27686f4f3b2c7d17557c84077ac801f

  • SHA256

    1f5eefc1feb47e11e53f82055ca0921fc1b1299dffa7972c6faeff1904fdad1d

  • SHA512

    c2b7682c265060c1c62be0b4dceba7fed6882b9fdc9cbbd1d379608a482bf215d81a2a3c03cc2df709bc936ee7d06ff1250dde92808bd0e0d1f1ee3410c35d9a

  • SSDEEP

    12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8DiKD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWPKrKe

Malware Config

Extracted

Path

\Device\HarddiskVolume1\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;">EB5B63A631414E4DF82EF2CC6DA38200C4FAED6AF20ECA31D46356722F6802C1999FC31D6688D612BACDAF76EAA0508CCC9A825587044BD24D32E0D316AC61E2<br>473F12DF05C18750A607AE741567ED446AF036A3B28C72F9816C61EBB96E09BA06491E16BD5A110585BF568E6722825536521893E977F58A2BCFF224C057<br>5AECF1A370776087771AC65B1FA684021C92BB40B657276D8E864AEF3A2D956A0992B80FF07DB1EF3D63619F770538E8B4EF476AC399DD09840D06220E4F<br>E11B9EECCC19B8E3296BD16A039303158D08C95EFE82D80BCD30F0332E27B904F1CA11131212306529CD9751808E836C211836828859CA7E0512096B73A7<br>DC8C56AB2AA10541E4F36800654281FA57F8115DDFDB0584BC49FE66C2EEC357E00D224878082D9ABD4A2429F15EC87EB145F7746901F44906287C05B53C<br>0098738BD62A625DEEFB7656AEF5EEDDF46AF80A1D41793254EF41C165F03B95612408E149C47DF4A68605EE03DC3F5FD8486E0B19FACDE41466E904F080<br>11285A02A62551504FF57B329134E23A670EDD36A5926DBAA63B2F0274431BA7ED36F1376A632C3C3BC8B136E51A831BD91E448E602A8B206EE054C670BA<br>ACC023968C20AE88845B13AA6C2C2E7FF211FBE58DF5DDC6A98F885383F27058C78983152AD78FC1473C9D0CE1A3AE36AFCE049F91C292901F047E896243<br>A02BFD948C569F58D6EEB7865C50</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 </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="ithelp05@decorous.cyou ">ithelp05@decorous.cyou </a> <br><a href="ithelp05@wholeness.business">ithelp05@wholeness.business</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>
Emails

href="ithelp05@decorous.cyou

">ithelp05@decorous.cyou

href="ithelp05@wholeness.business">ithelp05@wholeness.business</a>

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker payload 1 IoCs
  • Medusalocker family
  • UAC bypass 3 TTPs 2 IoCs
  • Renames multiple (221) 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 5 IoCs

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

  • 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\Build.exe
    "C:\Users\Admin\AppData\Local\Temp\Build.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:1100
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:5076
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2732
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2424
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2376

Network

  • flag-us
    DNS
    8.8.8.8.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    8.8.8.8.in-addr.arpa
    IN PTR
    Response
    8.8.8.8.in-addr.arpa
    IN PTR
    dnsgoogle
  • flag-us
    DNS
    149.220.183.52.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    149.220.183.52.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    140.32.126.40.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    140.32.126.40.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    95.221.229.192.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    95.221.229.192.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    228.249.119.40.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    228.249.119.40.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    13.86.106.20.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    13.86.106.20.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    197.87.175.4.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    197.87.175.4.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    18.31.95.13.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    18.31.95.13.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    172.214.232.199.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    172.214.232.199.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    29.243.111.52.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    29.243.111.52.in-addr.arpa
    IN PTR
    Response
No results found
  • 8.8.8.8:53
    8.8.8.8.in-addr.arpa
    dns
    66 B
    90 B
    1
    1

    DNS Request

    8.8.8.8.in-addr.arpa

  • 8.8.8.8:53
    149.220.183.52.in-addr.arpa
    dns
    73 B
    147 B
    1
    1

    DNS Request

    149.220.183.52.in-addr.arpa

  • 8.8.8.8:53
    140.32.126.40.in-addr.arpa
    dns
    72 B
    158 B
    1
    1

    DNS Request

    140.32.126.40.in-addr.arpa

  • 8.8.8.8:53
    95.221.229.192.in-addr.arpa
    dns
    73 B
    144 B
    1
    1

    DNS Request

    95.221.229.192.in-addr.arpa

  • 8.8.8.8:53
    228.249.119.40.in-addr.arpa
    dns
    73 B
    159 B
    1
    1

    DNS Request

    228.249.119.40.in-addr.arpa

  • 8.8.8.8:53
    13.86.106.20.in-addr.arpa
    dns
    71 B
    157 B
    1
    1

    DNS Request

    13.86.106.20.in-addr.arpa

  • 8.8.8.8:53
    197.87.175.4.in-addr.arpa
    dns
    71 B
    157 B
    1
    1

    DNS Request

    197.87.175.4.in-addr.arpa

  • 8.8.8.8:53
    18.31.95.13.in-addr.arpa
    dns
    70 B
    144 B
    1
    1

    DNS Request

    18.31.95.13.in-addr.arpa

  • 8.8.8.8:53
    172.214.232.199.in-addr.arpa
    dns
    74 B
    128 B
    1
    1

    DNS Request

    172.214.232.199.in-addr.arpa

  • 8.8.8.8:53
    29.243.111.52.in-addr.arpa
    dns
    72 B
    158 B
    1
    1

    DNS Request

    29.243.111.52.in-addr.arpa

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    669KB

    MD5

    b446b1c86f3d27bb39783f9d3a112a40

    SHA1

    d9f66f8db27686f4f3b2c7d17557c84077ac801f

    SHA256

    1f5eefc1feb47e11e53f82055ca0921fc1b1299dffa7972c6faeff1904fdad1d

    SHA512

    c2b7682c265060c1c62be0b4dceba7fed6882b9fdc9cbbd1d379608a482bf215d81a2a3c03cc2df709bc936ee7d06ff1250dde92808bd0e0d1f1ee3410c35d9a

  • C:\Users\Default\ntuser.dat.LOG2

    Filesize

    536B

    MD5

    b8204074879e4705e9e82831a54e6409

    SHA1

    a2bc0a11b009be818d127c45165adcc81058c221

    SHA256

    9979bcd26933dd4f781c262b36f6d3df7f68f917258998913d38a660201699cf

    SHA512

    15ee09261ef9cfbb6f60312f0293650c68758a609bad3368ecf3e30ed72ec534e1987863b055afa42098a736f081b5c3a208eacf5f5ccfc3a8835eab39ece8f4

  • \Device\HarddiskVolume1\HOW_TO_RECOVER_DATA.html

    Filesize

    5KB

    MD5

    24d54a24267f08afdb6e68c85a7b8b2d

    SHA1

    7054b8203e821a1256271a6ce2c1705cf83ca28c

    SHA256

    4b98b8978026346524a5c96ea0d7e85da2aa861243a0664860bf0afbe8e671f4

    SHA512

    f31415827d9ca4f066f3cf51aff6ea1b3a1d43b0fc0d5fc26260f5d50f9d22d78cd47efb109887bbfb8e33db586295b58b8e8fff4590c1687db43398d5235fc1

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