Yara is awesome, but sometimes you need to manipulate the data streams you're scanning in different ways.
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Network Analysis Tool
WinDivert: Windows Packet Divert
PcapPlusPlus is a multiplatform C++ library for capturing, parsing and crafting of network packets. It is designed to be efficient, powerful and easy to use. It provides C++ wrappers for the most popular packet processing engines such as libpcap, Npcap, WinPcap, DPDK, AF_XDP and PF_RING.
Ettercap Project