North Korea may have more than 6,000 hackers working on its behalf abroad, according to the recently released North Korean edition of the U.S. Army Techniques Publication (ATP) 7-100 series manuals. The manual uses open and confidential sources and offers to determine what the U.S. should expect from the DPRK's Korean People’s Army in the event of any active conflict.

The long-anticipated manual, published on July 24, contains new estimates on the size and organization of North Korea’s electronic intelligence warfare and cyber units — most notably the groups under the DPRK’s Cyber Warfare Guidance Unit, or Bureau 121.