hch@infradead.org;
alan@lxorguk.ukuu.org.uk; Arjan van
The problem is that you have to account for the cases where the malware
made it onto the system even if you were trying to catch it ahead of
time. For example:
- Administrator turns off or reduces AV protection for some reason for
some period of time. It happens all the time.
- New infection makes it onto the machine before the signatures have
caught up with it. This also happens. There is an ongoing PR race
among AV vendors about who was faster on the draw to get out signatures
to detect some new malware. The fact that this race exists reflects
that reality that there is some window during which new malware will
make it onto some number of machines before the scanners catch up.
time.
giving
"dirty"
better
It isn't the primary mode. It's the mode that catches things as they
arrive, and as they are about to be used. Most sites will also employ
the applications' features for running regular scans of the whole system
on a scheduled basis, to catch anything that may have slipped through.
Jon Press
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