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Spam email on network


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#1 mikeiom

mikeiom

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Posted 19 March 2014 - 06:28 AM

Hello, wonder if anyone can help. My network is being spammed to death by an external email address using our exchange server to send 1000s of emails out via our server. This has got us blocked by several sites and causing a huge issue.

 

I have scanned all PCs on the network for viruses and malware but all clean, so how can this be happening??

 

Can anyone help??

 

Thanks 

 

Mike



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#2 TsVk!

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Posted 19 March 2014 - 06:52 AM

sounds like the server is infected...

 

or your malware hunting attempts are not conclusive. More likely this.



#3 Crazy Cat

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Posted 19 March 2014 - 06:20 PM

Monitor the server network adaptor with Wireshark http://www.wireshark.org/ or TCPView, http://technet.microsoft.com/en-us/sysinternals/bb897437.aspx

When you think you have identified the malware use SocketSniff, http://www.nirsoft.net/utils/socket_sniffer.html for in-depth analysis.
 

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe. ― Albert Einstein ― Insanity is doing the same thing, over and over again, but expecting different results.

 

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