Which of the following attacks is likely associated with changes made to a vendor’s IP address during an investigation?

The attack most likely associated with changes made to a vendor’s IP address during an investigation is DNS poisoning. This type of attack manipulates DNS (Domain Name System) records to redirect users from legitimate sites to fraudulent ones. During an investigation, if the IP address associated with a vendor's domain is altered, this could indicate that the DNS records were compromised—enabling attackers to control and divert traffic meant for a legitimate destination to a malicious site.

In the context of an investigation, examining changes in a vendor's IP address might reveal attempted DNS poisonings, where attackers aim to exploit vulnerabilities in the DNS system to mislead users or conduct further attacks. This aligns with the nature of DNS poisoning, which fundamentally relies on altering IP address mappings in DNS records to disrupt normal operations and lead users to harmful sites.