Warzone Remote Access Trojan ("RAT") is a type of malicious software("malware") that has been used by cyber criminals to gain unauthorized access to victim computers. Warzone RAT is sometimes referred to with variations of the name Ave Maria RAT. Warzone RAT allows users to remotely connect and surreptitiously access a victim's computer to browse the file system, take screenshots, record keystrokes, steal victim's usernames and passwords, watch the victim through their web camera, and conduct a range of other activities. Unlike similar commercially available programs, Warzone RAT does not notify or request approval from the owner of the computer, but instead allows remote access without the victim's knowledge or permission. Malware such as Warzone RAT can be used by cyber criminals to further promote a myriad of criminal activities, such as ransomware attacks, theft of personally identifiable information, phishing campaigns, and other computer-related crimes.
The specific techniques employed by the Warzone RAT malicious software itself are outlined by the Federally Funded Research and Development organization MITRE on their ATT&CK framework website accessible here: https://attack.mitre.org/software/S0670