Session splicing is an IDS evasion technique in which an attacker delivers data in multiple, small sized packets to the target computer, making it very difficult for an IDS to detect the attack signat

tcpsplice (or tcpslice) is a utility for extracting and merging pcap capture files, not a tool for performing session splicing attacks against IDS systems.

Burp Suite is a web application security testing proxy used for intercepting and manipulating HTTP/S traffic between a browser and server, and does not perform session splicing IDS evasion.

Hydra is an online password brute-forcing tool that supports numerous protocols, and has no functionality related to TCP session fragmentation or IDS evasion techniques.

Whisker, written by Rain Forest Puppy, was one of the first CGI scanners to implement session splicing and other IDS evasion techniques by splitting attack payloads across multiple small TCP segments. Because many IDS systems reassemble packets inefficiently or only inspect individual packets rather than the full reassembled stream, the fragmented payload bypasses signature detection. Whisker's evasion module directly implements the session splicing method described in the question.