If you have a POS machine, there are a few quick things you can do to help protect these systems from this particular type of attack:

Use a strong password

Much has been written on the importance of choosing a strong password, and yet here we have malware that is successfully breaching machines because they have such poor passwords. It is important to note that in this case, many of the passwords used on the breached machines were the default passwords or were simple variations on the name of the pos vendor. It is best to use a passphrase rather than a simple password, as a passphrase can be easy to remember yet very time-consuming to crack due to its length.

Limit login attempts

Once you have a strong password in place, make it count: Limit attempts to log in to cash register machines to just a few. Locking people out after 3-5 incorrect attempts is a common range. This will dramatically decrease the effectiveness of brute forcing attacks, as the attackers will be prevented from trying large numbers of incorrect passwords until they get to the right one.

There are a variety of other things you can do to help protect your touch POS  machines, which are much the same measures as you would take to protect any other machine on the Internet; including regularly updating software and using security software.