Cyber Threat Actor: The Jester

The threat actor knownas The Jester operates under that alias and is based in the United States of America. The Jester is described in open sources as a vigilante hacker. On November 9, 2017, The Jester carried out a radio broadcast hijacking targeting a North Korean state‑run shortwave station transmitting on 6400 kHz. The actor replaced the station’s regular programming with the song “The Final Countdown.” The hijacking was performed by gaining unauthorized access to the transmission feed and overriding the audio output. The Jester publicly claimed that the intrusion was aimed at a facility allegedly used by the North Korean regime to send coded messages preceding major weapons tests. The actor asserted that disrupting this channel could interfere with the regime’s communications related to nuclear and ballistic missile activities.

The incident was reported by the International Business Times (IBTimes) and highlighted by The Jester’s own statements. Strategic Sentinel, a geostrategic consulting group, later noted historical correlations between the station’s coded broadcasts and subsequent North Korean military activities. No publicly available information details the specific tools, malware, or initial access vectors employed by The Jester in this operation. Likewise, there is no evidence linking The Jester to any state sponsor, criminal consortium, or broader hacking group. Consequently, the profile of The Jester remains limited to the verified facts of the 2017 radio hijacking and the actor’s self‑described vigilante role.