15. A non-transitory computer readable medium storing instructions for detecting automatically generated malicious domain names network in a network, the instructions when executed by a processor of a computer comprising functionality to: identify a plurality of domain name service (DNS) queries in the network, wherein the plurality of DNS queries share a common attribute; analyze the plurality of DNS queries to identify a plurality of alphanumeric elements embedded in a set of domain names associated with the plurality of DNS queries; analyze the plurality of alphanumeric elements to determine a distribution metric of the set of domain names; and generate an alert of domain fluxing based on the distribution metric according to a pre-determined criterion.
15. A non-transitory computer readable medium storing instructions for detecting automatically generated malicious domain names network in a network, the instructions when executed by a processor of a computer comprising functionality to: identify a plurality of domain name service (DNS) queries in the network, wherein the plurality of DNS queries share a common attribute; analyze the plurality of DNS queries to identify a plurality of alphanumeric elements embedded in a set of domain names associated with the plurality of DNS queries; analyze the plurality of alphanumeric elements to determine a distribution metric of the set of domain names; and generate an alert of domain fluxing based on the distribution metric according to a pre-determined criterion. 16. The non-transitory computer readable medium of claim 15 , the instructions when executed by the processor further comprising functionality to: identify, in the network and in response to generating the alert of domain fluxing, a source node of the plurality of DNS queries; and facilitate in performing a network security operation with respect to the source node, wherein the automatically generated malicious domain names are used for at least one selected from a group consisting of controlling a botnet and conducting a spam email campaign.