An infamous hacking group is back to aggressively targeting banks less than a month after the Justice Department announced the arrest of three of its high-level members, according to new research.

The Justice Department's announcement on the extradition characterize the tactics as "vishing" and "smishing" -- phishing by voice and text messages respectively.

Hackers appear to have compromised the main IT service provider for the Winter Olympic Games months before last week's highly publicized cyberattack.

An elite hacking group linked to the Russian government masqueraded as a NATO representative to send a barrage of phishing emails to diplomatic organizations in Europe, including Romania’s Foreign Ministry of Affairs, documents show.