The investigation is linked to the WikiLeaks publication of almost 9,000 pages that detailed the CIA’S hacking operations. According to the documents, the CIA uses its own malware to hack into anyone’s electronics and spy on them. The agency even has malware from Russia, and other countries, which means agents can make an attack look like it came from that country.
CBS News reported:
Sources familiar with the investigation say it is looking for an insider — either a CIA employee or contractor — who had physical access to the material. The agency has not said publicly when the material was taken or how it was stolen.
Much of the material was classified and stored in a highly secure section of the intelligence agency, but sources say hundreds of people would have had access to the material. Investigators are going through those names.
The FBI and CIA warned about an investigation a day after Wikileaks published the documents. In response, Wikileaks state it received the documents from someone within the agency:Read more at LegalInsurrection