Cyber sabotage and cyberespionage. Updates on Russia’s hybrid war against Ukraine. REvil seems to have returned.

An investigation is ongoing into the sabotage of French fiber optic cables, which has highlighted vulnerabilities in critical infrastructure. Russian hackers have compromised embassy emails to target governments, while Ukraine is applying lessons learned from a 15-year-old cyberattack on Estonia to its defense. Despite fears, widespread and damaging Russian cyberattacks have yet to materialize in the US. Hacktivism and privateering have become new fields of activity, with a YouTuber promoting DDoS attacks on Russia, raising legal questions. Ukraine's digital fight has gone global, with Romanian government websites being attacked by a pro-Russian group. REvil ransomware has returned, with a new malware sample confirming the gang's resurgence.