The Trend Micro Pattern Files Parent topic

The Trend Micro scan engine uses an external data file, called the virus pattern file, to identify the latest security risks.
You can view the most current version, release date, and a list of all the new definitions included in the file from the following website:
To view the version of the pattern file that IM Security is currently using on your IM Security server, open the product console and view Summary.
Tip
Tip
Trend Micro recommends frequently updating your pattern files. Scheduled updates can be used to conveniently and regularly update IM Security components.