Now it has leaked details of at least five men it claims are recruiters for the terror group, as well as taking down 5,500 Twitter accounts.
Mirror Online reports that they have seen the names, addresses and phone numbers of men living in countries including Afghanistan, Tunisia and Somalia.
Anonymous activists also claimed to have identified a “high-ranking” recruiter living in Europe, but have not yet published an address.
We have contacted some of the men who have been named, but they have not replied and we have been unable to verify if the allegations against them are true.
Some Anonymous spokesmen claimed to have closed down a total of 5,500 ISIS supporters’ Twitter accounts, whilst others put the figure at 900.
Hitting these accounts is seen as a way of shutting down the ISIS recruitment and propaganda machine.
A group of hackers called GhostSec is also working feverishly to identify the Paris attackers.
Anonymous is now compiling a massive list of Twitter accounts and web pages ahead of a large cyber-assault due to take place later this evening.
It is expected to use a digital weapon called a “DDoS” to shut down websites.