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What does mean by command-and-control server? Flame Virus use C&C server to pass the information it has collected from infected host.

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it's name of logical role not any particular configuration of particular operating system. it means that infected computers connect to such server periodically and download instructions what to do.

in case of typical botnets c&c server can respond with:

  • list of urls and time periods when infected computers should start DDOS attack
  • content of the mail messages and list of recipients - that's where spam you receive comes from
  • binary files that will be run locally on infected computers - this allows 'upgrade' of infected machines with new functionality [eg new malicious software that can scan the internet in search of more vulnerable computers].
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  • Thanks for the reply pQd. Does attacher set-up C&C server at his end?
    – Pravin
    Oct 22, 2012 at 0:33
  • .......attacher?
    – pQd
    Oct 22, 2012 at 6:04

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