Overview

overview

10

Static

static

bc8487f444...43.exe

windows7_x64

10

bc8487f444...43.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    154s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    05/02/2022, 10:46

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Report Analysis Logs

General

  • Target
    bc8487f444ed159dc422bc062c47141357eb64fc49838e5bfd758e05a8317343.exe
  • Size 1.2MB
  • Sample220205-mt1mssagcm
  • SHA256 bc8487f444ed159dc422bc062c47141357eb64fc49838e5bfd758e05a8317343
  • MD5 SHA1 SHA512
Score
10/10
medusalockerevasionransomwarespywarestealertrojan

Malware Config

Extracted

Path

  • 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;">D770769E2DC7A8C0424E0E7699D3638636D3389E438CEDEDE881E3712D8A9B4C9813FD2F80625D200242C9198189E44164F5195BE93ABC84125DC54397AA77B7<br>4F82BA4461EFA3385AA364B52A3FAB3B73ED280C2E27F635A75C9C9EB543932DFB5769550D4BDC841CA2C9409B97B7F96701B8C25F86650CA4B6D93564D1<br>6CA4BF66489F5CAF9D10B1186EE2F3785E3D5C593C92217FECE7325BB4796AE5653AF8F2CA548C94FC3881E30651370C54EFF4120FE6A9B741A3739CAD72<br>3D9E8E19CBF8D5FAE6FB8D24C4F99F0B14426A3DD835866DCBEA4C83E9940347AF0B3792CC98DE414CFB14BDA7968572E0793DD21B38D7DE51C529236478<br>519CBDB3AC6D203E5D8932E269595CA92FFFEE65013494A22F3D3A1E0D577D7F157D3A987A0850B8593B20B9CF399FB7772A40C36B945967D9AB466DB98E<br>A873C598985A5DDAF54C74BE275AC278FA6E00CC6B2BD9872D132FE34EE01D0E4DA9F02DB7F8AEE6AA51CD823AE95CC4A82FB583899ABF3EA2BD3CDB1488<br>D0F44222E0A8F38B4861FF10CF642E7A2D3A43336A95FDC57E65BDB573653E1510369586F5AB2D343B33171B5BF7D687980C239F9034AF6830204098B73A<br>602072275A87D1B2CF551BE2BF9AD2F4A236C7784673ADE4256A64B3B30121A421100A3BDCDF252370938E36985168A12B106343B48A3C100F606D4AC4DF<br>B28CCD55269D002DF0B2838C0593</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 (BITCOIN) and get decryption software.</b><br><br> <a href="mailto:[email protected] ">[email protected] </a><br> <a href="mailto:[email protected] ">[email protected]</a> <hr> </div> <div class="text"> Make contact as soon as possible. Your private key (decryption key) is only <br> stored temporarily.<br> IF YOU DON'T CONTACT US WITHIN 72 HOURS, PRICE WILL BE HIGHER.<br> </div> </div> </div> <!--tab--> <!--text data --> </div> </div> <!--tab--> </div> </div> </body> </html>
Emails

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

    ransomwaremedusalocker
  • MedusaLocker Payload 3 IoCs
  • UAC bypass 3 TTPs
    evasiontrojan
  • Executes dropped EXE 2 IoCs
  • Modifies extensions of user files 7 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    evasiontrojan
  • 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.

  • Suspicious use of SetThreadContext 2 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.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 51 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs
  • System policy modification 1 TTPs 3 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\bc8487f444ed159dc422bc062c47141357eb64fc49838e5bfd758e05a8317343.exe
    "C:\Users\Admin\AppData\Local\Temp\bc8487f444ed159dc422bc062c47141357eb64fc49838e5bfd758e05a8317343.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2400
    • C:\Users\Admin\AppData\Local\Temp\bc8487f444ed159dc422bc062c47141357eb64fc49838e5bfd758e05a8317343.exe
      "C:\Users\Admin\AppData\Local\Temp\bc8487f444ed159dc422bc062c47141357eb64fc49838e5bfd758e05a8317343.exe"
      2⤵
      • 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:1100
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2216
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3524
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2096
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:1372
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    PID:3564
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1928
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      "C:\Users\Admin\AppData\Roaming\svhost.exe"
      2⤵
      • Executes dropped EXE
      PID:2980

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1100-132-0x0000000000400000-0x00000000004AB000-memory.dmp
        Download

        memory/1100-133-0x0000000000400000-0x00000000004AB000-memory.dmp
        Download

        memory/2980-140-0x0000000000400000-0x00000000004AB000-memory.dmp
        Download