British police said today they have made Europe’s first arrests in the battle against an online Trojan which threatened to compromise thousands of computers in the UK.

The ZeuS or Zbot Trojan, a type of sophisticated malicious malware, is believed to have infected and accessed personal information from tens of thousands of computers around the world.

Security company Trusteer Research issued a security advisory this week, dealing with a stealth new Zeus/Zbot phishing attack, which is aimed at harvesting enterprise log-in credentials for web banking, financial, HR, and SaaS accounts.