Only open the file within a Virtual Machine (VM) like VirtualBox or VMware to isolate it from your main OS.
Most versions found today are either "troll" files (containing screamers/gore) or dangerous malware (Trojans) designed to infect your computer. eseno es el tetero.rar
Most "guides" for this specific file are fake or intended to lead users to malicious links. If you are interested in the of the mystery, it is safer to watch "Internet Mystery" breakdowns on YouTube rather than seeking the file yourself. Only open the file within a Virtual Machine