Security experts warn that there has been a threefold increase in the number of hijacked 'zombie' PCs over the last quarter. Brian Krebs reporting on WashingtonPost: "The estimates come from Shadowserver, a group of volunteers that monitor activity from robot networks or 'botnets,' large armies of hacked personal computers used for spam, phishing and all kinds of criminal activity. Shadowserver saw a rise from roughly 100,000 botted PCs to about 400,000 over the past three months."

The apparent increase may be partly due to Shadowserver's deployment of more sensors detecting botnet attacks however it is also noted that criminals are getting more advanced at hiding bots.

Read full story: The Washington Post

Related topics: Cyberattack, Cybercrime, Security