RITT is a virus written in Pascal and compressed with PKLITE 1.15.
It is not common at all, but it is sometimes reported since McAfee
Scan has had a false positive on it.
Scan gave an unnecessary alarm on some files packed with PKLITE 1.15.
Examples of such files are DWCOMM and DWCONFIG from the Doorway package.
[Analysis: Mikko Hypponen, F-Secure]