Companion virus

A companion virus is a type of malicious software (malware) that can infect a computer when executed or opened. It works by copying itself and masquerading as a legitimate program or file in order to gain access to the system. It then either deletes the original executable or modifies its code, allowing it to continue running in the background with elevated privileges.

Once inside the system, the companion virus can proliferate, infecting other programs and files. It may also modify settings or install other malicious software. The goal of a companion virus is usually to cause damage or steal information.

The name of the virus reflects its behavior, as it “accompanies” legitimate programs in order to gain access to the computer. The virus is also sometimes referred to as a “sneak virus” due to its stealthy infiltration technique. A companion virus is usually spread through the sharing of infected files and discs or via a network.

Most antivirus programs are capable of detecting and removing companion viruses. It is important to keep your antivirus software and operating system up to date, as this will help protect against the latest threats. Additionally, users should practice caution when downloading files from unknown sources and be sure to only open files and programs from trusted sources.