![]() ![]() With multi-file, a new file is created after every 512MB of data. -l multi-file: Default is the log file size 512MB and the circular-mode, which overwrites the old entries after 512MB of data.-k 0x010: only raw packet should be saved, errors and statistics should be ignored.-p 0: The entire packet is to be captured (by default only 128 bytes).-c 1: On the interface with the ID 1 is to be captured.Here, too, it is worth looking at the help menu.įrom the help information the following command can be composed, which should provide a useful capturing for further analysis: pktmon start -etw -c 1 -p 0 -k 0x010 -l multi-file To do this, execute the command pktmon start with the appropriate options. ![]() For a first analysis in a security context, a complete capturing is useful and only for an effective analysis sorting and filters are needed.īut now to the relevant settings for a first capturing. The command filter also seems more relevant for troubleshooting if only specific ports, IPs, protocols etc. On a production system the list of Components can be quite long, so it is important to be aware of which interfaces you want to capture traffic on. in virtualized environments with multiple network stacks (Host, Guest, VPN, VLANs etc.) this can be helpful for troubleshooting. Since pktmon was not developed explicitly for security issues but for troubleshooting, the entire network stack is shown with their respective IDs. In this test system there is only one active interface with the comp ID 1. ![]() Now it can be seen that comp means, among other things, the network interfaces available for a capturing. This can be clarified with help.Īfter the help menu, pktmon comp list can be used to display all active components. Except for comp it is not immediately obvious what is behind it. Most available commands are self-explanatory (filter, start, stop, etc.). Furthermore, pktmon must be executed as Administrator in order to use it effectively. To get an overview of the options of pktmon, help can be appended after each command. The directory C:\tmp\pktmon was created for this purpose. It is recommended to create a directory where the first captures are stored, because C:\Windwos\System32\ is not the ideal place for this. The packet sniffer pktmon can be found at C:\Windows\System32\pktmon.exe, but can be executed anywhere on the command line with pktmon. For this purpose, a small lab environment with a current Windows 10 Pro as a test client and a Kali Linux as an additional participant in the network was set up. In the following article we will introduce first steps with pktmon and look for ways to get quick analysis results from the captures in a security context. Therefore, the question arises whether this is possible with pktmon under Windows with built-in mechanisms. The analysis with tcpdump on Linux with some Bash commands for sorting and filtering packet captures is relatively powerful and easy to do. The question is whether, in analogy to the well-known tools such as tcpdump or Wireshark, pktmon can now be used on a Windows system to make rapid analyses of possible indicators of a compromise. In the Windows Update Version 2004, pktmon received further updates, which might make it interesting for the analysis in a security context. Microsoft introduced with the Windows 10 October 2018 Update the command line Packet Sniffer pktmon.
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