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I'm looking for a tool that will enumerate the IP addresses that a system is connecting to. This is mainly for forensic purposes, to gather IOCs. I know we can run a netstat on windows, but would like something that is comprehensive and reports all processes (hidden, system, etc.)

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    Netstat is not processed-based, it does not matter if a process is hidden. It can list all connections. – Overmind Apr 24 '19 at 6:19
  • What about connections going through a proxy or a NAT, will it list the destination IP or my internal proxy server IP? – Anup Michael Salve Apr 24 '19 at 7:23
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    It does not matter where they do through as longs as they exist. – Overmind Apr 24 '19 at 7:48
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    To answer this question, we need more information. What exactly is the situation? Are you working on a RAM-dump? A live system? If so, what operating system? As it stands now, your question is too broad. Please edit your question to add all the relevant information. – MechMK1 Apr 24 '19 at 8:05
  • It will list the addresses that your machine has a connection to, e.g. a proxy. The forwarding of traffic happens in the proxy, not your PC (that would make a proxy pointless). Ultimately if you're in doubt it's comparably cheap to format your machine and start over. – Birb Apr 24 '19 at 8:06
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In Linux you can use netstat -ptan and if you don't have netstat you can use ss -neopa and if you are connected to a server trough a proxy you will not see the ip address of that server is connected to which process.

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For windows use this TCPView, this is a great tool for looking for exactly what you are looking for. If you want to look at the actual content of the traffic, check out Wireshark which allows for you to view the packets.

Happy hunting!

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