The Trickbot banking Trojan is now targeting U.S. banks in new spam campaigns fueled by the prolific Necurs botnet. The malware has grown more potent with the introduction of a customized redirection method as part of its attacks.

IBM X-Force and Flashpoint both recently spotted new Trickbot activity. According to the researchers, spam campaigns have been active over the past several months, with the latest Trickbot attack reported earlier this week. While Flashpoint focused on the U.S. as targets, IBM focused on the redirection attacks used to steal login details, personally identifiable information and financial authentication codes.