A Remote Access Trojan (RAT) is a type of malicious software that allows an attacker to gain control over a victim's computer remotely. Once installed, the RAT can enable the attacker to access files, monitor activities, and even use the webcam or microphone without the user's knowledge. This can lead to serious privacy violations and data theft. RATs are often spread through phishing emails, malicious downloads, or software vulnerabilities. Users can protect themselves by keeping their software updated, using antivirus programs, and being cautious about the links and attachments they open. Awareness of these threats is crucial for maintaining cybersecurity.