Sam, a malicious hacker, targeted the communication network of an organization and disabled the security controls of NetNTLM v1 by modifying the values of LMCompatibilitylevel, NTLMMinClientSec, and RestrictSendingNTLMTraffic. He then extracted all the non-network logon tokens from all the active processes to masquerade as a legitimate user to launch further attacks. What is the type of attack performed by Sam?