The software that the question is describing is known as an Antivirus Software. Like mentioned, this is a computer program that is used with the main goal of preventing, detecting, and removing malicious files on the computer known as computer viruses. They also act as a shield to prevent these malicious files from entering the computer through the internet, but like any other software these Antivirus Softwares can be exploited by hackers to gain access into a system.
