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 | 19 MAY | Mandiant | The IO Offensive: Information Operations Surrounding the Russian Invasion of Ukraine | [mandiant.com](https://www.mandiant.com/resources/information-operations-surrounding-ukraine) |
 | 19 MAY | CyberKnow | Overview of KillNet: Pro-Russian Hacktivists | [cyberknow.medium.com](https://cyberknow.medium.com/killnet-pro-russian-hacktivists-e916ac7201a3) |
 | 20 MAY | ESET | Sandworm continues attacks in Ukraine, ESET found an evolution of a malware loader dubbed ArguePatch used during the Industroyer2 attacks. ArguePatch was used to launch CaddyWiper | [twitter.com/esetresearch](https://twitter.com/esetresearch/status/1527531726905409536) |
+| 21 MAY | Anonymous | Anonymous declares war on pro-Russian hacker group Killnet | [twitter.com/YourAnonOne](https://twitter.com/YourAnonOne/status/1528048043647434752) |
+| 23 MAY | Sekoia | TURLA’s new phishing-based reconnaissance campaign in Eastern Europe | [blog.sekoia.io](https://blog.sekoia.io/turla-new-phishing-campaign-eastern-europe/) |
+| 24 MAY | Malwarebytes | Unknown APT group has targeted Russia repeatedly since Ukraine invasion | [blog.malwarebytes.com](https://blog.malwarebytes.com/malwarebytes-news/2022/05/unknown-apt-group-has-targeted-russia-repeatedly-since-ukraine-invasion/) |
+| 25 MAY | Reuters | A new website that published leaked emails from several leading proponents of Britain's exit from the European Union is tied to Russian hacking group "COLD RIVER" (aka Callisto) by Google TAG | [reuters.com](https://www.reuters.com/technology/exclusive-russian-hackers-are-linked-new-brexit-leak-website-google-says-2022-05-25/) |
+| 26 MAY | 360 Qihoo | APT-C-53 (Gamaredon) organization-related cyber attack activities more frequently, and found that the organization began to issue free DDoS Trojan "LOIC" To Conduct DDoS attacks. | [mp.weixin.qq.com](https://mp.weixin.qq.com/s/gJFSlpIlbaI11lcClNN_Xw) |
+| 26 MAY | BleepingComputer | Google shut down caching servers at two Russian ISPs | [bleepingcomputer.com](https://www.bleepingcomputer.com/news/technology/google-shut-down-caching-servers-at-two-russian-isps/) |
+| 27 MAY | DarkTracer | Threat actor from the Cyber Army of Russia claims to have hacked "sfs(.)gov(.)ua" and leaked the database. | [twitter.com/darktracer_int](https://twitter.com/darktracer_int/status/1530133003841613825) |