The Five Eyes intelligence alliance issued a warning about attacks on critical infrastructure by Russian-aligned groups, including Killnet, in April 2022.
[3] Following explosions in unrecognized Transnistria, the Information and Security Service of the Republic of Moldova reported that the pro-Killnet hacking group had launched a series of cyberattacks from abroad against websites of Moldovan official authorities and institutions.
[12] On 1 August 2022, the group and its founder called "Killmilk" claimed responsibility for a cyber-attack on the American defence corporation Lockheed Martin, as a retaliation for the HIMARS systems supplied by U.S. to Ukraine.
[17][18] At a press conference on the same day, Chief Cabinet Secretary Hirokazu Matsuno explained that no information had been leaked as a result of this attack at this time.
[16] According to the Twitter post published by the threat research firm CyberKnow, Killnet and their founder, Killmilk threatened that they would attack the Georgian government if it continues to work against the Russian Federation.
[19] On 26 January 2023, the German Federal Office for Information Security (BSI) announced that a wide-ranging DDoS attack against various agencies and companies in Germany was taking place since the night before.
[20] The attacks had been announced in advance by Killnet, supposedly as retaliation for the German government's decision to send Leopard 2 battle tanks to Ukraine.