The acronym 'RAT' stands for Remote Access Trojan in cybersecurity threats. RATs are malicious software programs that allow unauthorized access and control over a target computer or network. Cybercriminals typically use them to steal sensitive information, monitor user activities, or deploy additional malware. Detecting and removing RATs can be challenging due to their stealthy nature. Organizations must implement strong security measures, including regular system scans, employee training, and intrusion detection systems, to safeguard against these threats.