Since TCPView also shows you which program is responsible for which connection, it is very suitable to figure out which process is communicating on that strange port you noticed. TCPView is a program that will show you detailed listings of all TCP and UDP endpoints on your system, including the local and remote addresses and the state of active TCP connections. TCPView and Tcpvcon by Microsoft sysinternals This way you can grab all the options the downloader tries without getting actual malware on your system. The beauty of the dropped requests is that any dropper or downloader will assume the download it tried first is off-line and will move on to try the next one. You can use the –o switch to write the log to a text file, from which you can easily harvest the resulting domains. This happens a lot when we already know what malware will be downloaded but want to know the domains they'll be coming from (so we can block them). I use it primarily to find out what a script or program is trying to download, especially when I have no interest in the files it’s trying to download. URL Revealer by Kahu security URL Revealer is a web proxy that will capture requests and then drop them. We have focused on tools that you can use on a local system and that run on the same system, to the exclusion of remote traffic monitoring and network monitoring software.

Each has its own strength, and therefore it will depend on your specific needs to select the program that's right for you.

There are several alternatives to Wireshark for Windows systems, and we will shed a little light on the ones that we like the most. So let's take a look at some free, simple tools to get started. Not everyone is versed in the use of robust tools like Wireshark (even though it is worth the trouble of learning if you have to do network traffic analysis on a regular basis). Are you an amateur analyst or security enthusiast looking for free tools to do some basic Internet traffic monitoring? You've come to the right place.

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