A previously undocumented cross-platform malware codenamed Noodle RAT has been put to use by Chinese-speaking threat actors either for espionage or cybercrime for years. While this backdoor was previously categorized as a variant of Gh0st RAT and Rekoobe, Trend Micro security researcher Hara Hiroaki said "this backdoor is not merely a variant of existing malware, but is a new type altogether."