Analysis

  • max time kernel
    164s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01/02/2022, 15:51

General

  • Target

    124c65d01c6ba01dead43e246ae4c300d7345c8f46ae71ebf101bef5510f35aa.exe

  • Size

    667KB

  • MD5

    dbedb905796795de32272ea95c45a36a

  • SHA1

    76354f7b2a20d76f82343e0d01c8710600d01483

  • SHA256

    124c65d01c6ba01dead43e246ae4c300d7345c8f46ae71ebf101bef5510f35aa

  • SHA512

    871def3ab6253a2dfae41b5dc6bf19461bca16e234ff94165e7e25aeee79563c0a074304f0627104f76871961dd7c421dd8fa277f821cf6dfa150d61a4105b4e

Malware Config

Extracted

Path

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

Ransom Note
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=Edge"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, user-scalable=yes"> <title>Title</title> <style> html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video { margin: 0; padding: 0; border: 0; font-size: 100%; font: inherit; vertical-align: baseline; } /* HTML5 display-role reset for older browsers */ article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section { display: block; } body { font-family: Tahoma, Arial; background: #717798; } .all { max-width: 1170px; margin: auto; background: #000; min-height: 100px; border-radius: 10px; } .tl { text-align: center; color: #e03930; font-family: Tahoma; font-size: 28px; font-weight: 700; position: relative; height: 60px; line-height: 60px; } .close { padding: 15px; width: 36px; height: 36px; position: absolute; right: 15px; top:0; } .bg { background: #252a42; text-align: center; color: #ffffff; padding: 25px 15px; font-size: 18px; font-weight: 400; line-height: 20px; } .bg span { color: #f25252; } .bg a { color: #9676fd; font-size: 20px; font-style: italic; text-decoration: none; line-height: 35px; } .bg c { color: #f25252; font-weight: 500; font-size: 20px; line-height: 35px;} .footer { padding: 15px 0;} .tl2 { text-align: center; color: #e03930; font-size: 25px; font-weight: 500; line-height: 32px; text-decoration: underline; padding-bottom: 15px; } .text { min-height: 192px; color: #ffffff; font-size: 16px; font-weight: 500; line-height: 24px; } .text div { padding-right: 50px; padding-left: 50px; } @media (max-width: 767px) { .tl { height: auto; padding-right: 50px; line-height: 1.5; } .text div { padding: 0 15px; } .footer { background: none; } } </style> </head> <body> <div class="all"> <div class="container"> <div class="tl">All your data are encrypted! <div class="close"></div></div> <div class="bg"> <c>What happened?</c> <br> Your files are encrypted, and currently unavailable. <br> You can check it: all files on you computer has new expansion.<br> By the way, everything is possible to recover (restore), but you need to buy a unique decryptor. <br> Otherwise, you never cant return your data.<br> <br> <c>For purchasing a decryptor contact us by email: </c><br> <a href="mailto:[email protected]">[email protected]</a><br> If you will get no answer within 24 hours contact us by our alternate emails: <br> <a href="mailto:[email protected]">[email protected]</a> <br> <br> <c>What guarantees?</c> <br> Its just a business. If we do not do our work and liabilities - nobody will not cooperate with us.<br> To verify the possibility of the recovery of your files we can decrypted 1 file for free. <br> Attach 1 file to the letter (no more than 10Mb). Indicate your <b>personal ID</b> on the letter:<br> <span style="width:800px; word-wrap:break-word; display:inline-block; color: #ffffff; font-size: 10px;">D42A96F0D11BADED02BB3A58E52D52FC16F048E39E96FE06C35184B1A8E900D04FE9029CE13004338109A5513D8A27549DD0C3C25271FF1C89C05CD9E0B83916<br>122CD8ECE50980DFE3DD6E0F3B94D444DB5532257580AD62F46470CCDF5E28BCBEAF186CFD001B5285C7DBFAB1D5AA338A346CCE15D24E0F0E059BB01D7F<br>2E8B0027E0BF17324CF3BADD817B2E833A612067D4D67FE171795ABD1AC130F8A5843B9AFD09FDE316BD77F31DC360DB9C53FBFFF6F54E92B7BE7D1D3DEC<br>0E892ABE4E230B9B02F5F7FE274A728C2584DB1ECC60F6EC9D10CBC074F00CC7B45450A0F5870A9D430EAEB0CD175A9CC870C7E75315F5F571C339238BE9<br>2897E83D863FB166B97077AAF64BA991A72A62167E5D7263CC2DCE373DE99DF2FFDC119839344AE13380FA4C5F84612FEB368411305DC0196EEDBCB04690<br>C9B08239DE381B202FFEFBCAA6257857BAD52D5E09A54683B9C3D8BD8198CE3143CB7ADE397F85E8395E0D570DED866D9074F870C7E6D88578721147204F<br>729569775F8C42D306C5937F1F9A308C0C4033F1AC5D70438BC5A4A9269C08EF3B4B2F064D398CBE04A1B96AA8BFD8E4A340B76CEC0A2474B688085ECBDA<br>444D5A8054F629BE2CD4B000F7F6E059007B0D9AAB84F49F80ECA21E1AF63727EABA83344BF3FA1F52DFF0BE45A8B4B42F60DC8FDCC8519098575F58472A<br>94060719DDDA9E2B2DC9F1E70225</span> <br> </div> <div class="footer"> <div class="tl2"> Attention! </div> <div class="bg2"> <div class="text"> <div> - Attempts of change files by yourself will result in a loose of data. <br> - Our e-mail can be blocked over time. Write now, loss of contact with us will result in a loose of data.<br> - Use any third party software for restoring your data or antivirus solutions will result in a loose of data. <br> - Decryptors of other users are unique and will not fit your files and use of those will result in a loose of data.<br> - If you will not cooperate with our service - for us, its does not matter. But you will lose your time and data, cause just we have the private key. </div> </div> </div> </div> </div> </div> </body> </html>
Emails

href="mailto:[email protected]">[email protected]</a><br>

href="mailto:[email protected]">[email protected]</a>

URLs

http-equiv="X-UA-Compatible"

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker Payload 2 IoCs
  • UAC bypass 3 TTPs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 2 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.

  • 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). 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\124c65d01c6ba01dead43e246ae4c300d7345c8f46ae71ebf101bef5510f35aa.exe
    "C:\Users\Admin\AppData\Local\Temp\124c65d01c6ba01dead43e246ae4c300d7345c8f46ae71ebf101bef5510f35aa.exe"
    1⤵
    • 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:1504
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:472
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:784
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1124
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1048
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1912
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1548
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:788
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {F13C6E6E-0FDF-4020-B3DF-7ED2DC2E578B} S-1-5-21-3846991908-3261386348-1409841751-1000:VQVVOAJK\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:676
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:884

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1504-54-0x0000000075601000-0x0000000075603000-memory.dmp

    Filesize

    8KB