Difference Between Resident and Non-Resident Virus
Feature | Resident Virus | Non-Resident Virus |
---|---|---|
Location | Installs itself in the computer’s memory. | Does not remain in memory; resides in the infected file. |
Operation | Can operate independently of the original infected file, affecting the system continuously. | Needs the infected file to be executed to spread or cause damage. |
Detection and Removal | More difficult to detect and remove due to its presence in memory and continuous operation. | Easier to detect and remove, as it is not active until the infected file is executed. |
Method of Spread | Can infect other files without any need for the infected file to be opened again after the initial infection. | Spreads by replicating itself when the infected file is executed, then infecting other files and programs. |
Stealth and Impact | Often more stealthy and potentially more damaging because it can interfere with system operations directly. | Less stealthy and its impact is limited to the times when the infected file is executed. |
Examples | Mebroot, Virat. | Classic file infectors like the Cascade virus |
What is a Resident Virus? Examples and Protection
Resident Virus is a type of malware that hides and saves itself in the computer’s memory. Depending on how the virus is programmed, it can infect any file run by the computer. This type of virus can even attach itself to anti-virus software, allowing it to infect any file verified by the program.