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Last night I loaded up Fiddler2 to do a little debugging and I saw three connections to domains like


How can I go about isolating the application responsible?

I was thinking possibly logging all outbound connections to domains that do not contain a "."

Any ideas are greatly appreciated =]

PS: The domains did not resolve, if they had, I would be freaking out.


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up vote 2 down vote accepted

enter image description here

Fiddler does show which process the connections originate from.

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I cant believe I didnt catch that before =] Thank you! Is there anyway to pull a stack trace from the offending application? – jroberts Nov 30 '12 at 17:27
@jroberts Do you mean from fiddler directly? I'm not sure if that is possible. You can always hook a debugger to the process to view the stack trace though. – Terry Chia Nov 30 '12 at 17:30
I was hoping for something a little more passive, but that is a good call, thing is, I was in fiddler all night, and I only saw the connections once, so catching them as they happen is like a needle in a haystack – jroberts Nov 30 '12 at 17:32
For the record, since it is Chrome, it is probably legitimate behavior for detection of upstream DNS NXDOMAIN tampering. See:… – hwilbanks Nov 30 '12 at 23:09
@hwilbanks The Chrome screenshot is just an example from my on system. The asker didn't mention where the traffic originated from. – Terry Chia Dec 1 '12 at 2:19

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