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Interesting new technique for DDOS attack

Dear All,

Found this new technique for DDOS attack for one of our SOC customers.

DDOS technique

1. Attackers registers the new domain abcd.tk. provides a CNAME mapping for www.abcd.tk to www.target_domain.com

2. They buy a cloud service to do load testing for www.abcd.tk. When load testing starts , all load is send to www.target_domain.com

Some of the use cases that we are using to combat these are:

1. Any HTTP request to www.target_domain.com with host: field NOT equal to www.target_domain.com

2. Any HTTP request with useragent: loadrunner,io

3. Detecting a 10x spike in HTTP requests for the Internet facing sites , using an active list

Have you faced these attacks? Any other suggestions to prevent these type of attacks?

What use cases have you implement to detect DDOS in general?

Regards,

Sujay

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