Like new Bagle.AQ worm spreads by sending out messages with an infected attachment compressed under the common Zip format. Both the name of the attachment and the body of the message are a variant on "price" or "new price.", the
Bagle.AQ started spreading Monday morning and quickly began bombarding some corporate e-mail systems with thousands of infected messages, Gullotto said.
"It made its way into the public eye in a rather grandiose fashion," he said.
Those same techniques should also ensure a relatively brief heyday for the worm, as e-mail security systems learn to block the variant, Gullotto said. "I don't expect it'll last more than 24 hours," he said. "Then it's onto the next pest."
The initial Bagle virusand appeared to be a fairly standard mass-mailing worm. But the pest has gone on to spawn dozens of variations, thanks partly to between the Bagle coder and the creator of the rival .