Troj/Urelas-Q is a type of Trojan horse malware that infects computers by disguising itself as a legitimate file or program. Once it is executed on a system, Troj/Urelas-Q can perform various malicious activities, such as stealing sensitive information, installing additional malware, or gaining unauthorized access to the infected computer. It can spread through email attachments, malicious websites, or infected removable storage devices. Troj/Urelas-Q can also exploit vulnerabilities in software or operating systems to infect computers.