Security experts warn of a rapidly mutating spam campaign using bogus messages from UPS. The UPS-based scam uses phony email to dupe recipients into opening an attachment or clicking on a link to infect machines with malware. Dell SecureWorks today reported an uptick in malicious messages posing as problems with recipients’ airline tickets, canceled direct deposits and shipping invoices. Experts urge users to be wary of fake sites and too-good-to-be-true discounts pitched via email and social media.”]