The group, known as GhostShell, claims to have released millions of personal records from the Central Intelligence Agency and Wall Street.
Anons took the websites of American and British intelligence and law enforcement offline this weekend.
A former CIA trainee who claims to have been wrongly discharged has taken to Twitter and Blogspot to tell her side of the story and expose what she views as the CIA's "corruption."
The hacker collective Anonymous is back, targeting spy agencies in its Friday initiative.
The CIA monitors public information on social networks, but a recently retired IT manager for the agency says users shouldn't be overly concerned.