Roxanne is a professional hacker hired by an agency to disrupt the business services of...

 In the scenario described, the malware that consumes a server’s memory and network bandwidth, causing the server to overload and stop responding, is typically a worm. Worms are a type of malware that replicate themselves and spread to other computers across a network, often consuming significant system resources and network bandwidth in the process. Unlike viruses, which require human action to spread, worms typically exploit vulnerabilities or use automated methods to propagate without the need for user intervention.

References: This information is based on general cybersecurity principles and the common characteristics of different types of malware. For detailed references, please consult the official EC-Council Certified Security Specialist (E|CSS) study materials or other authoritative cybersecurity resources.