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Experts theorize on self-span emails
Security experts are puzzled over a new spamming technique in which
victims receive emails that appear to be coming from themselves, SC
Magazine UK reports.
Only numbers appear in the subject line and letter body – often three and
four digit combinations – but the messages are not believed to be
malicious, according to a report on the SANS Internet Storm Center
website.
So far, experts are unsure what to make of the new spam. But one expert
suggested on his blog that the mass emails could be the work of a botnet
herder.
"It might be (him) checking the quality of his email lists, finding which
messages bounce and which don’t," he said.
According to SANS, the spam could be a precursor of another Bagle worm
variant.
"There is a possible link to Bagle seeding as it was done in the past, and
we might need to expect a new variant of it soon," said a SANS
spokesperson.