Tool for creating malicious Zip files that do not require unzipping

Tool for creating malicious Zip files that do not require unzipping

The tool transfers zip files to disk using JScript and COM objects to create a zip file on disk and then execute them. Password protection of the zip file allows you to bypass EDR and antivirus scanning mechanisms.

ZipExec is a Proof-of-Concept (POC) tool to wrap binary-based tools into a password-protected zip file. This zip file is then base64 encoded into a string that is rebuilt on disk. This encoded string is then loaded into a JScript file that when executed, would rebuild the password-protected zip file on disk and execute it. This is done programmatically by using COM objects to access the GUI-based functions in Windows via the generated JScript loader, executing the loader inside the password-protected zip without having to unzip it first. By password protecting the zip file, it protects the binary from EDRs and disk-based or anti-malware scanning mechanisms.

./ZipExec -h

__________.__      ___________                     
\____    /|__|_____\_   _____/__  ___ ____   ____  
  /     / |  \____ \|    __)_\  \/  // __ \_/ ___\ 
 /     /_ |  |  |_> >        \>    <\  ___/\  \___ 
/_______ \|__|   __/_______  /__/\_ \\___  >\___  >
        \/   |__|          \/      \/    \/     \/ 
                (@Tyl0us)

Usage of ./ZipExec:
  -I string
        Path to the file containing binary to zip.
  -O string
        Name of output file (e.g. loader.js)
  -sandbox
        Enables sandbox evasion using IsDomainedJoined.

ZipExec (https://github.com/Tylous/ZipExec) is a tool to execute payloads stored in password protected zip files without extracting them.