Frank writes:
It's the ISP security guys who are insisting in their words "the
account or perhaps your whole computer is infected".
The only Linux malware in the wild attacks Web sites via vulnerabilities
in things like PHP. Aside from the difficulty there is no motivation
for creating malware to attack Linux desktops. There are not enough of
them (and you'd need a version of your malware for every dist) to make
it profitable. A good piece of Windows malware can turn a million
Windows desktop boxes into bots. How many Linux bots would the same
effort yield?