Name: Bigorna Category: RAT Alias: Backdoor.Bigorna 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: Written in Delphi. Made in Brazil. Signatures: process: bigorna 1.0.exe: MD5 Hash: a26e6a756fecc9f0304... process: winbios.exe: MD5 Hash: c7f2e192c549c92db8c.. Type: RAT - A Trojan software is any software on a user's computer that the user is not aware or intentionally installed. Most Trojan software is designed to perform some sort of actions that could jeopardize the user's security or privacy.