rootkity maju jasnu definiciu..
A rootkit is a program (or combination of several programs) designed to take fundamental control (in Unix terms "root" access, in Windows terms "Administrator" access) of a computer system, without authorization by the system's owners and legitimate managers. ... but in recent years have been largely malware to help intruders gain access to systems while avoiding detection. (wikipedia)
ja hovorim o tom, ze aj s user-pravami mozes narobit dost zle, bez toho aby si toho roota musel mat.
staci ti, ak pustis nejaky evil kod na pozadi, ktory bude dajme tomu pocuvat na nejakom vysokom porte, alebo sa pripoji na nejaku ipcku z ktorej bude prijimat prikazy. nemusis mat cely system na to aby si ho mohol zneuzit. takto mozes v pohode kurit plny vykon zo stroja len pre seba, alebo vyuzivat konektivitu na rozosielanie spamu, robenie DDoS utokov...