Maarten Van Horenbeeck at the SANS Internet Storm Center has been tracking the spam subject lines associated with the Storm worm. “Happy B-day America,” “Independence Day Party” and other lines to dupe email recipients. We reported in January that the Storm worm has been fairly successful in spreading using a variety of topical headlines. Malware authors have been producing stealthier creations in recent years. Rather than focusing on getting the message out, some security researchers have found that the focus has shifted to making it difficult for IT pros to discover the viruses. The answer according to Horenbeeck is to block .exe downloads now.