Jeremiah Fowler, an American security researcher who has lived in Kiev for the past decade and fled to Poland for the past few months due to the war, randomly surveyed 100 Russian databases exposed online and found that 92 of them had been compromised by the loose hacking group Anonymous. The hackers used a MeowBot-like script to rename the folder to something like putin_stop_this_war, stop war, no war, HackedByUkraine, etc., and delete the contents of the file. Anonymous claims to have hacked more than 2,500 Russian and Belarusian websites, leaking a trove of data that could take years to assess. Shmuel Gihon, a researcher at security firm Cyberint, said there was so much data leaked that they don’t know what to do with it now. As a direct result of the hacking, Russia’s cybersecurity defenses are much weaker than previously thought. Anonymous also provides penetration testing services for Ukraine to find vulnerabilities before Russia can exploit them.
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