Re: regarding malicious domains becoming inactive

[Sushant Sinha <sushant () umich edu>]

List of mailicious/advertising domains is maintained by a number of
people.  SURBL (surbl.org) maintains list of URLs found in spam and
Google maintains list of websites that may infect the end user
(uprovides using the safe browsing API). Stopbadware also maintains such
a list. 

So the only question is when are these websites active and when are they
inactive. I do not see why this information is terribly important as
assuming that these websites are always up is more safe.

-Sushant.
On Tue, 2008-11-04 at 12:05 +0530, Bhatnagar, Mayank wrote:
> Hi,
>
> Often we find while analyzing malwares that malicious domains become
> inactive after some period of time.
>
> They may be active during initial period of activity, malwares when
> executed connecting to these domains, these domains then sending
> malicious files....binaries etc.....but just as soon as this information
> is being known or the behavior has been captured by IDS/IPS signatures
> blocking this domain, soon the domain itself become inactive.
>
> What do you feel should be the responsibility of IDS/IPS solution
> providers? I feel keeping track of such domains (live or down) in an
> automated manner may be one possibility, keeping a signature for some
> time as a measure of protection another. Also maintaining blacklists of
> these domains may be helpful.
>
> How should one handle such cases? Any ideas?
>
> Thanks & Regards,
> Mayank
>
>
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