Bogus BianLian Gang Sends Snail Mail Extortion Letters

A group posing as the BianLian ransomware gang is sending extortion letters via postal mail to senior executives of various organizations. These letters inform the recipients that their computer network has been compromised and threaten to delete or disclose sensitive company data. The use of physical letters sent by mail is an unusual approach for a cybercriminal group, which typically favors electronic communications.