Analysis

  • max time kernel
    154s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01-02-2022 15:39

General

  • Target

    73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd.exe

  • Size

    719KB

  • MD5

    dca6639ceeb23a5dc0b9fca15c4706d4

  • SHA1

    3d3d0b600cefaee86f63467bd8307b7434e7ebc9

  • SHA256

    73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd

  • SHA512

    d303c199e6422bab5ea045734ed2b2e8a5bfa0f08c1dd8a056fb5660bf513916fb6e1f9873dcdf5fa3f7b32be4f68de90d6ff707ba01f8ef9a666024ff70cb8a

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\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;">E6A339A3742D17BC9657B94C2BD0A709CE5BA647703C111B854C03AE1023A39CE085D9DCB5742DAED50583D48AD49F8C242ADFD46CA0A60F95891D414D77BF84<br>561AA3FC4B09E1BE1E50C7FB7C26D9E64B04B7F57BDD51FCF5DCB3E5CF645BD9560AB7E7BEE35A41D2F4450062E1F8950EA63360F5ACA03435A88434C3A6<br>EEEEBA73E76607660C1FA98E9FD2DCB5E029BF5C6C01AFED74A610BB82361C24D6F4B448EDED66526F8259705C4C8221566CFB4CDBC4CA25025B975A2360<br>396184141F46980FAC12E13BE3BD5852F4126026E7E35AA42D768D5F9FA74A4BBE9584A2D5FC1F53B184ACB97E774E9DB538F4F6D07A1D7189650BAFAF2A<br>732255AA9849B12ECE3BFB99D6FB62714506EB683E249D255216469F4036780931C14639118FE195922B6F0BE6453456A970DF30F0CFC80F5047164C1D93<br>0170E3371BC8D718C52945C257A66752C739A8C4FB087F832BF3ECBC1A0E8160D7BBFE3D86A668BF44589E95A5723FA8FF098F9B23A99B08B73083E03325<br>0116C5CBEC3FD7D2ADB1A1B91F5EC9A94DC570213AD86C495D5110070D8945424EF8DB8734105AC527C0D941A0360AE08BD4C261F82C1B40A3BFEE3018C8<br>DD8D134A66C13C5A041B5C4D5620E61C2839B37D96FA587B4396C17BF702CE66C3C4B5427F8A8BD57730447179B723F5025177B7BAC5F838B955C61E34C5<br>5AAEC85A4969C910334204D75D54</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/5-jUTTwXmX7tQtTVcuQhse07j2MQJIGab9-3K1i1hDGQVkfobmu5P0xYDUqtCgMjurC</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="mailto:[email protected]">[email protected]</a> <br> <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

Signatures

  • Detect Neshta Payload 1 IoCs
  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker Payload 5 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • UAC bypass 3 TTPs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • 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.

  • Drops file in Program Files directory 45 IoCs
  • Drops file in Windows directory 1 IoCs
  • 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.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd.exe
    "C:\Users\Admin\AppData\Local\Temp\73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd.exe"
    1⤵
    • Modifies system executable filetype association
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2028
    • C:\Users\Admin\AppData\Local\Temp\3582-490\73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd.exe"
      2⤵
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Drops desktop.ini file(s)
      • Enumerates connected drives
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:696
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:1384
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:980
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:1104
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1836
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:1968
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1792
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1084
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {219E2442-9CFF-417D-A9C4-4EC6A92029C7} S-1-5-21-2329389628-4064185017-3901522362-1000:QSKGHMYQ\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1736
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:1704

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\DW20.EXE
    MD5

    02ee6a3424782531461fb2f10713d3c1

    SHA1

    b581a2c365d93ebb629e8363fd9f69afc673123f

    SHA256

    ead58c483cb20bcd57464f8a4929079539d634f469b213054bf737d227c026dc

    SHA512

    6c9272cb1b6bde3ee887e1463ab30ea76568cb1a285d11393337b78c4ad1c3b7e6ce47646a92ab6d70bff4b02ab9d699b84af9437b720e52dcd35579fe2693ec

  • C:\Users\Admin\AppData\Local\Temp\3582-490\73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd.exe
    MD5

    d3fefee3a79ba1021cba99889435a110

    SHA1

    609f467838b9dd180fbf3ab8a47706feca8688c0

    SHA256

    bbe41cc56e6df36779d9d92052b231a458bb9f5ea38c26747f5d038019d82fdd

    SHA512

    4f611edb91e797c5bb7b427b5a65be50fe20ddcc6cb7a6dec6f74689fa2fb18bc0c3930217f19251336b9f5297c2b668199cf61047f1872ec3bcf30420eb4c98

  • C:\Users\Admin\AppData\Local\Temp\3582-490\73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd.exe
    MD5

    d3fefee3a79ba1021cba99889435a110

    SHA1

    609f467838b9dd180fbf3ab8a47706feca8688c0

    SHA256

    bbe41cc56e6df36779d9d92052b231a458bb9f5ea38c26747f5d038019d82fdd

    SHA512

    4f611edb91e797c5bb7b427b5a65be50fe20ddcc6cb7a6dec6f74689fa2fb18bc0c3930217f19251336b9f5297c2b668199cf61047f1872ec3bcf30420eb4c98

  • C:\Users\Admin\AppData\Roaming\svhost.exe
    MD5

    d3fefee3a79ba1021cba99889435a110

    SHA1

    609f467838b9dd180fbf3ab8a47706feca8688c0

    SHA256

    bbe41cc56e6df36779d9d92052b231a458bb9f5ea38c26747f5d038019d82fdd

    SHA512

    4f611edb91e797c5bb7b427b5a65be50fe20ddcc6cb7a6dec6f74689fa2fb18bc0c3930217f19251336b9f5297c2b668199cf61047f1872ec3bcf30420eb4c98

  • C:\Users\Admin\AppData\Roaming\svhost.exe
    MD5

    d3fefee3a79ba1021cba99889435a110

    SHA1

    609f467838b9dd180fbf3ab8a47706feca8688c0

    SHA256

    bbe41cc56e6df36779d9d92052b231a458bb9f5ea38c26747f5d038019d82fdd

    SHA512

    4f611edb91e797c5bb7b427b5a65be50fe20ddcc6cb7a6dec6f74689fa2fb18bc0c3930217f19251336b9f5297c2b668199cf61047f1872ec3bcf30420eb4c98

  • \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE
    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

  • \Users\Admin\AppData\Local\Temp\3582-490\73856883e34f63bfc3a845517aeff46467c941f990cd383035a24b4990f6f4dd.exe
    MD5

    d3fefee3a79ba1021cba99889435a110

    SHA1

    609f467838b9dd180fbf3ab8a47706feca8688c0

    SHA256

    bbe41cc56e6df36779d9d92052b231a458bb9f5ea38c26747f5d038019d82fdd

    SHA512

    4f611edb91e797c5bb7b427b5a65be50fe20ddcc6cb7a6dec6f74689fa2fb18bc0c3930217f19251336b9f5297c2b668199cf61047f1872ec3bcf30420eb4c98

  • memory/2028-55-0x0000000076731000-0x0000000076733000-memory.dmp
    Filesize

    8KB