Name: Nightmare Category: RAT Alias: Psycho Nightmare, Trojan.Win32.Nightmare Advice: Remove Risk: Elevated Risk Elevated threats are usually threats that fall into the range of adware in which data about a user's habits are tracked and sent back to a server for analysis without your consent or knowledge. Description: Signatures: process: night.exe: MD5 Hash: f1ce4dd035da4b1e9fc.. Type: RAT - A Remote Administration Tool (RAT) is a Trojan type of software that when run, provides an attacker with the capability of remotely controlling a user's computer (victim) over the Internet. The attacker usually has full access to functions on the victim's computer. The victim's computer usually listens on the Internet for the attacker's commands.