Hackers try to do something on one of our sites
One of our site recently received a lots of attack which all seems similar. By chance, we have a error logging framework which send us error log email when something strange happen or an error raised on the server. 
  
 Here is what happen : 

    Error : The file '/(A(u76U7llazAEkAAAAZTJmYmE1NmMtZTE4YS00YzQ2LTlmYzItNGIxMzZjMzNjOTc4vkp-I-8cYbLrHx25-IfNdMvuKao1))/MostOfOurPublicPage.aspx' does not exist.
    Request:
    URL: http://Ourwebsite.com/(A(u76U7llazAEkAAAAZTJmYmE1NmMtZTE4YS00YzQ2LTlmYzItNGIxMzZjMzNjOTc4vkp-I-8cYbLrHx25-IfNdMvuKao1))/MostOfOurPublicPage.aspx
    User Agent: Mozilla/5.0 (compatible; SiteBot/0.1; +http://www.sitebot.org/robot/)
    Referrer: 
    Host: 213.186.122.2 (Ukraine)
    SecuredConnection: False

User-agent shows SiteBot/0.1 but I'm preaty sure its not ... at least I never heard anything about sitebots doing things like that.

**Question**  
So, anyone have any idea of what the heck is that and what can I do to prevent this things because it make our error logging framework sending us something like 100 error logging per day!
 
 
*Note : I usualy talk french so sorry for my english.*
Hackers try to do something on one of our sites
===

One of our site recently received a lots of attack which all seems similar. By chance, we have a error logging framework which send us error log email when something strange happen or an error raised on the server. 
  
 Here is what happen : 

    Error : The file '/(A(u76U7llazAEkAAAAZTJmYmE1NmMtZTE4YS00YzQ2LTlmYzItNGIxMzZjMzNjOTc4vkp-I-8cYbLrHx25-IfNdMvuKao1))/MostOfOurPublicPage.aspx' does not exist.
    Request:
    URL: http://Ourwebsite.com/(A(u76U7llazAEkAAAAZTJmYmE1NmMtZTE4YS00YzQ2LTlmYzItNGIxMzZjMzNjOTc4vkp-I-8cYbLrHx25-IfNdMvuKao1))/MostOfOurPublicPage.aspx
    User Agent: Mozilla/5.0 (compatible; SiteBot/0.1; +http://www.sitebot.org/robot/)
    Referrer: 
    Host: 213.186.122.2 (Ukraine)
    SecuredConnection: False

User-agent shows SiteBot/0.1 but I'm preaty sure its not ... at least I never heard anything about sitebots doing things like that.

**Question**  
So, anyone have any idea of what the heck is that and what can I do to prevent this things because it make our error logging framework sending us something like 100 error logging per day!
 
 
*Note : I usualy talk french so sorry for my english.*