### Comment:
How can malware propagate within a network?

### REPLY:
To propagate malware within a network, an attacker can exploit weak or default passwords on network devices, gaining unauthorized access to those devices. They can then use tools like remote administration tools (RATs) to move laterally across the network, infecting multiple machines. Another method is to exploit unpatched software vulnerabilities in network services, allowing the attacker to execute code and gain control over network devices.