Difference Between VIRUS, TROJAN and ROOT-KIT

VIRUS:

A virus is normally runs in "stealth mode", hiding itself by infecting executalbes and system files., It still typically runs as an application which is why anti-virus software can detect and remove it.

TROJAN:

A trojan, which is an advanced virus, is meant to hide in a more soophisticated fashion.

ROOT-KIT:

A root-kit, on the other hand, subverts part of the operating system to hide it self and gain the maximum control possible. Due to this, it is capable of monitoring as well as performing all activities on a system. It can act as a vehicle for other root-kits and virues as well.

Root-Kits turn a computer into a remotely controllable victim, often also making it a spam-bot to send out unsolicited commercial email.

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