Analysis

  • max time kernel
    150s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    16-11-2022 05:38

General

  • Target

    b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe

  • Size

    719KB

  • MD5

    8474039d83805eb7b447325c3a8d1ebb

  • SHA1

    a07d537f4253745a087709a9a07c449f84deed8d

  • SHA256

    b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649

  • SHA512

    3272091bbf123ba5e1592e8b2bd7740cddcb174fa158bc6980b25ee61d92387e94a25284736253f83a6eea78b427f6717e888e843db9d7759cfe9a7676576438

  • SSDEEP

    12288:q4UOTYQivI2qZ7aSgLwkFVpzUvest4ZEbjJLuhJVoM7SPd:bRTYVQ2qZ7aSgLwuVfstRJL6YM6

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;">F4994027DBD86A60C54E929BDE291CF1522E6AF000D03717066898BEDD3F59019250E872805A3456C2CB16166CC9298A226BEC58A036454627D8D982F4370BAC<br>2A4E0372570B32FD106BB7C4367BE06508DABF2B7596846FB43B25C6E35E5FB4ECFE5BA8AB67FC60A23E741C1A24631D4E331D041A3B060280CF50B53BA1<br>DFA6AB4B792DFAAC2C1A4081B19779FD0C58D976BF78741480C6CB09391DCD183E314DAB44E0B704134921A5B580987F2AEFDAF7A3908D84CD85795DF1AB<br>98ADF8F2B382F29BA67FF80EF098770EB98ECDBC9BC2CDB3D32FEF4B2A3D9A3298E1EC70809BF66BF79A7FDC91F285CFCCF19D93FBFE1CE4E2820C2637B8<br>11AE84353DBF438D0ED9015E962DE1DA627CA0B9449B654A1B9E91A92878E607CE99FFACD13B6088F46E92CCD440523331DC778DAC31FBB9127E70AA9C09<br>4E3DB0A492F3CBF0E159EF2749A2A22354BEE28E4E37B0F1330F3BC61A6B0F52F2C9B32FCA79C6F1AD1B620B79DDDBDA6ECA87A86AAC5F6D6B5B97EBC685<br>927D179B4CA6992A4FE95ACB977C9C08A87063873B66F002BA6C97C56E129687672AAE4DE8AFE5526A985D1709FD99F69F19E1DD3F77F78A4E03F162F39C<br>6EDF9468ED0F1080FA941C3F00C9536DAE63FEC219810573A56656A750EC13C9BE9DB7332CFDDE73AF1CA4EA3F82C368BD6D0EC792C2F424A10EDEF9973F<br>69A08E6B8369B50A8C72C47F6A88</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/31-LPy3hdSfGLBgLSfGcKN9rubDKoa1VMK4-jYy07h0aZDffbnIWODKSuovhy1PH34nH</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="[email protected]">[email protected]</a> <br><a href="[email protected]">[email protected]</a> <br> <b>* To contact us, create a new mail on the site:</b> <a href="https://protonmail.com">protonmail.com<br> <hr> <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>

Signatures

  • Detect Neshta payload 1 IoCs
  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker payload 6 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 2 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 2 IoCs
  • Modifies extensions of user files 12 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Loads dropped DLL 3 IoCs
  • 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.

  • Drops file in Program Files directory 64 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\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe
    "C:\Users\Admin\AppData\Local\Temp\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.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:1308
    • C:\Users\Admin\AppData\Local\Temp\3582-490\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • 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:1172
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:776
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1580
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:1116
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:800
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:1128
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1884
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1764
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {61685563-BC94-465C-A2EC-E051330ED48C} S-1-5-21-3406023954-474543476-3319432036-1000:VUIIVLGQ\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:1112

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

    Filesize

    864KB

    MD5

    5249a3355d734bdccbf450af1a3affdf

    SHA1

    acfebe52359b0691cc0dc729828e7d580aa8c385

    SHA256

    362f098849cf692192daedfc660e7d69cee61172f1b3d838fb026e8fa319cf08

    SHA512

    5782a57bebfb620e77513790bb5a001273891f45caf0c52548ee32ddfa97fc3f07fc5997e5975d8c957c4f6f55af6735adc8690116044b2993887e67fa744de0

  • C:\Users\Admin\AppData\Local\Temp\3582-490\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe

    Filesize

    678KB

    MD5

    5aa0a571567f8437556e9b00ae5a3532

    SHA1

    45377cb152832c9112db7909219fa87a6e760aae

    SHA256

    73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

    SHA512

    d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

  • C:\Users\Admin\AppData\Local\Temp\3582-490\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe

    Filesize

    678KB

    MD5

    5aa0a571567f8437556e9b00ae5a3532

    SHA1

    45377cb152832c9112db7909219fa87a6e760aae

    SHA256

    73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

    SHA512

    d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

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

    Filesize

    678KB

    MD5

    5aa0a571567f8437556e9b00ae5a3532

    SHA1

    45377cb152832c9112db7909219fa87a6e760aae

    SHA256

    73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

    SHA512

    d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

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

    Filesize

    678KB

    MD5

    5aa0a571567f8437556e9b00ae5a3532

    SHA1

    45377cb152832c9112db7909219fa87a6e760aae

    SHA256

    73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

    SHA512

    d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

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

    Filesize

    252KB

    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

  • \Users\Admin\AppData\Local\Temp\3582-490\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe

    Filesize

    678KB

    MD5

    5aa0a571567f8437556e9b00ae5a3532

    SHA1

    45377cb152832c9112db7909219fa87a6e760aae

    SHA256

    73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

    SHA512

    d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

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

    Filesize

    678KB

    MD5

    5aa0a571567f8437556e9b00ae5a3532

    SHA1

    45377cb152832c9112db7909219fa87a6e760aae

    SHA256

    73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

    SHA512

    d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

  • memory/776-60-0x0000000000000000-mapping.dmp

  • memory/800-63-0x0000000000000000-mapping.dmp

  • memory/1112-70-0x0000000000000000-mapping.dmp

  • memory/1116-62-0x0000000000000000-mapping.dmp

  • memory/1128-64-0x0000000000000000-mapping.dmp

  • memory/1172-56-0x0000000000000000-mapping.dmp

  • memory/1308-54-0x0000000075531000-0x0000000075533000-memory.dmp

    Filesize

    8KB

  • memory/1580-61-0x0000000000000000-mapping.dmp

  • memory/1884-65-0x0000000000000000-mapping.dmp