What type of malicious procedure involves using sniffing tools to capture network communications to intercept confidential information or gather credentials that can be used to extend the attack?

eavesdropping

Explanation:

Eavesdropping is as an electronic attack where digital communications are intercepted by an individual whom they are not intended. This is done in two main ways: Directly listening to digital or analog voice communication or the interception or sniffing of data relating to any form of communication.