So, we've seen the recent SOBER variants used their own SMTP engine to
propagate as well as a predefined list of usernames and passwords at
ISPs to send themselves.

We've also seen that keeping viruses and spam out of our mailboxes is
easier when we can identify the sender as a zombie, and that it is
harder when the junk is coming from a valid ISP and/or user at an ISP.

http://www.viruslist.com/en/weblog?done=vlpolls_resp155596558

Well, Kaspersky is reporting that the latest SOBER is also stealing (at
least) Outlook usernames and passwords from infectees.

Therefore, we can reasonably expect more junk coming from AUTH'ed
senders.


Andrew.



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