A remote access tool can be used for legitimate reasons, such as for remote technical support. The difference between tools and Trojans is that tools are often used to help, while Trojans are used for malicious purposes. Remote Access (or Administration) Trojan.
RAT: Remote Access Tool or Trojan? RAT can be an abbreviation for any of the following: Like many types of software, the same type of tool can be used to help or to harm.