This document provides answers to frequently asked questions about Corporate Account Take Over (CAT) fraud. CAT fraud involves tricking business owners into installing malicious banking software on their computers through spoofed emails. This allows criminals to steal login credentials and fraudulently transfer funds from business accounts. According to the information provided, Eastern European organized crime groups are believed to be primarily responsible for CAT fraud. While anti-virus software may not detect the customized banking malware, businesses can help prevent losses by disconnecting infected computers and contacting their bank immediately if they believe they are a victim.