Summary

This is a boot sector virus, which contains the following encrypted texts:

OH-MY-GOD! Moloch (tm) is here! Moloch is a trademark of SquiBoyz
The virus modifies only few bytes in the boot sector. It uses variable encryption.

Moloch also modifies the CMOS settings to force a boot to happen always from the hard drive. Finally, Moloch uses direct I/O to control the hard drive, which makes it quite difficult virus to bypass if it's already resident in memory.

[Analysis: Mikko Hypponen, F-Secure]