1. A system, comprising: a processor; and a memory coupled with the processor, wherein the memory is configured to provide the processor with instructions which when executed cause the processor to: process one or more proxy logs in order to generate a graph of domains, wherein those domain pairs in the graph that are connected have low support in that the number of times the domain pairs are visited is lower than a predetermined support threshold and high confidence in that users accessing the domain pairs are redirected to another domain a greater number of times than a predetermined confidence threshold; identify one or more domains within the graph that are highly connected to other domains in the graph in that the one or more domains have a degree of connectivity to said other domains higher than a connectivity threshold; and flag the identified domains as suspicious domains, wherein processing the proxy logs includes: deciding whether to normalize domain names; in the event it is decided to normalize domain names, normalizing domain names so that all domain names are at a same level; deciding whether to filter domain names using a whitelist; in the event it is decided to filter domain names, filtering out whitelisted domains using the whitelist; filtering out invalid domain names; performing user-specific sessionization using a specified time window to create a plurality of buckets; calculating a support value and a confidence value for each possible domain pair from the overall plurality of buckets in the full dataset; and creating an edge in the graph between those domain pairs that have a support value that is less than a support threshold and a confidence value that is greater than a confidence threshold.