John works as a professional Ethical Hacker. He has been assigned a project for testing the performing attacks on the server is made easy and he can observe the flaws in the We-are-secure server. To p

Evasion attack is a broad category name for techniques that bypass IDS, not a specific attack type describing signature mutation.

Session splicing splits a TCP session into small fragments so individual packets do not match IDS signatures, which is different from a virus that changes its own signature.

An insertion attack sends crafted packets that the IDS accepts and processes but the target host discards, exploiting differences in how each device reassembles streams - it does not involve changing malware signatures.

A polymorphic shellcode attack involves malware that encrypts or mutates its own code each time it replicates, producing a different binary signature with every iteration. Because signature-based IDS systems rely on matching known patterns in their database, a constantly changing signature will never match a stored rule. This is the defining characteristic of polymorphic malware and the specific IDS evasion technique described in the scenario.