F-Secure BlackLight is able to correctly ignore non-malicious objects and alerts only on real rootkits, which makes it useful even for users without technical knowledge. It is also able to deal correctly with files that have been modified during the scanning process. This makes it possible to use it in the background without interrupting normal work.
Rootkits for Windows work in a different
way and are typically used to hide malicious software from for example
an antivirus scanner. Rootkits are typically not malicious by
themselves but are used for malicious purposes by viruses, worms,
backdoors and spyware. A virus combined with a rootkit produces what
was known as full stealth viruses in the MS-DOS environment.
The
rootkit itself does typically not cause deliberate damage. Its purpose
is to hide software. But rootkits are used to hide malicious code. A
virus, worm, backdoor or spyware program could remain active and
undetected in a system for a long time if it uses a rootkit.
The malware may remain undetected even if the computer is protected
with state-of-the-art antivirus. And the antivirus can't remove
something that it can't see. The threat from modern malware combined
with rootkits is very similar to full stealth viruses that caused a lot
of headache during the MS-DOS era. All this makes rootkits a
significant threat.
Homepage - http://www.f-secure.com/blacklight
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