An important advisory was published on Monday by the U.S. Cybersecurity and Infrastructure Security Agency (CISA) , warning that malicious actors are actively using commercial spyware tools and remote access trojans (RATs) to target users of mobile messaging apps. “These cybercriminals use sophisticated targeting and social engineering techniques to spread spyware and gain unauthorized access to the victim’s messaging app, facilitating the deployment of additional malicious payloads that can further compromise the victim’s mobile device,” the U.S. agency said. CISA cited several campaigns that emerged since the beginning of the year as examples. These include: The threat actors, according to the agency,