In the last week or so I’ve seen a significant increase in the number of virus containing e-mails arriving which means there is some new Windows virus going around that is not yet in clamav’s viral database.
It would appear this new virus is attempting to hack accounts because we’ve also seen a large corresponding increase in invalid authentication attempts.
If you run Windows please make sure your anti-virus database is up to date and run full system scans from time to time.
If you do not have MalwareBytes anti-malware software installed, I strongly recommend it as about 97% of the malware I’ve ever been infected with, it has found. Second to that Kaspersky is also good but heavy weight demanding a lot of resources.