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August 9th, 2009, 04:17 AM   #1
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DDOS attack on Twitter

Sometimes it's amazing to see how the old hacking methods can remain the most efficient ones ... you've probably realized that Twitter has been experiencing a massive outage these days due to a DDOS attack targeting one of its members (who happens to be a political activist). The attack consists in sending zillions of connection requests to Twitter's server in order to have it crash (the same old method that was used to target government websites, etc ...); nowadays, the hackers use an army of zombies (computers infected by worms who are then turned into spam bots), which makes them very difficult to identify ...
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September 6th, 2009, 10:14 PM   #2
 
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Re: DDOS attack on Twitter

Nice post thanks for sharing the information.
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September 8th, 2009, 04:15 PM   #3
 
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Interesting information, julien.
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April 30th, 2010, 02:46 PM   #4
 
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Re: DDOS attack on Twitter

the zombies are more commonly known as bots
scarily hackers can get 1000 bots for about $20 from the right sellers on the underground(I have seen it)

DDOS attacks are usually requesting a random service from the server
all you need to do is sent random data to the server so that the server needs to check the packets in the firewall, using cpu time which is how it slows down the server

in the end the issue is worse than most realise as a server under a ddos attack often ends up either being brute-forced if possible or in some cases can enter single-user-mode (also known as kernel mode) which means it will follow any request regardless of the user sending the request and some systems wont log those actions meaning they could download entire password databases as a time and brute-force the encryption usually using python or java nowadays but sometimes c or c++.

If this site ever comes under such attack I suggest regular flushing the dns and increasing the size of the tcp stack.

Also I would suggest having back-up's of everything every 24 hours, and keep all password databases on a seperate partition and make them salted md5's.
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