What is Rootkit?

Rootkit is a malicious program or combination of many malicious programs which is engineered to take control of operating system without authorization of the computer's user. It is basically intended to seize control of the system and keep itself hidden from the user.

In the early days, it use to replace system tools like ls, passwd or ps in Unix system. Soon after it was spotted by security experts, hackers started to target kernel itself which is hard to discover easily.


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