Final answer:
A rootkit is a type of malware that hides or removes traces of evidence, such as log entries.
Step-by-step explanation:
The type of malware that hides or removes all traces of evidence is a rootkit. Rootkits are designed to gain privileged access to a computer system and modify the operating system to conceal their presence. They can hide files, processes, network connections, and even modify log entries to cover their tracks.