A prolific phishing gang known for using sophisticated and targeted e-mail attacks to siphon cash from small to mid-sized business bank accounts appears to be back in operation after more than a 5-month hiatus, security experts warn. From Feb. 2007 to Jan 2009, analysts at Sterling, Va., based security intelligence firm iDefense tracked 38 separate phishing campaigns from am Eastern European gang they simply call “Group A.” iDefense believes this group was one of two responsible for a series of successful phishing attacks that spoofed the U.S. Better Business Bureau (BBB), the U.S. Department of Justice, the IRS, as well as Suntrust and payroll giant ADP. Last summer, authorities in Europe and Romania are thought to have arrested most members of a rival BBB phishing gang that iDefense called Group B. While the type of tricks that Group A employs once victims are hooked have grown more sophisticated, the initial