Analysis of information sources in references of the Wikipedia article "TV5Monde" in English language version.
Unit 54777 also is thought by Western intelligence to work with other psy-ops and cyber units, such as the CyberCaliphate, a hacking outfit passing itself off as supporters of the Islamic State but really part of the same GRU unit that would penetrate the Democrats' networks in 2016 [...] In April 2015, the CyberCaliphate, again claiming to be Islamic State supporters, took France's TV5Monde off the air for 18 hours.
Unit 54777 also is thought by Western intelligence to work with other psy-ops and cyber units, such as the CyberCaliphate, a hacking outfit passing itself off as supporters of the Islamic State but really part of the same GRU unit that would penetrate the Democrats' networks in 2016 [...] In April 2015, the CyberCaliphate, again claiming to be Islamic State supporters, took France's TV5Monde off the air for 18 hours.