"The domains occupied were utilized by hackers or persons associated with [Callisto group](https://cyberdefence24.pl/politics-i-right/putin-want-mix-in-British-government-in-polsce-to-juz-was), a applicable FSB unit", reads in [https://www.justice.gov/opa/pr/justice-department-disrupts-Russian-intelligence-spear-phishing-efforts) published by [US Justice Department](https://www.justice.gov/opa).
