Enhanced electronic security systems and methods are provided. A whitelist, blacklist, or both of resource access sources that are allowed to use a particular resource access account are obtained. Upon detecting an access attempt to a particular resource on a computer network, a source of the access attempt and a resource access account used in the access attempt is identified. The whitelist, blacklist, or both are referenced to determine if the source of the access attempt is allowed to use the resource access account used in the access attempt. When the source of the access attempt is not allowed to use the resource access account used in the access attempt, one or more mitigation tasks may be performed.