This is not a new scam but the target is new. According to news reports, the prospective client emails a request for representation to the law firm and then sends a cashier’s check far exceeding the law firms typical retainer. The firm wires the money back to the client only to then discover that the original cashier’s check was counterfeit. So far, two firms have fallen for the scheme out of six attempts.
Lesson: don’t engage a client without at least a phone call first!