Yahoo`s advertising servers have been distributing malware to hundreds of thousands of users over the last few days.
The United Nations atomic agency has said some of its computers were infected by malicious software.
Researchers were able to trigger malware with a bandwidth of only five bits per second - a fraction of the bandwidth used by laptops or home computers.
Social networking giant Facebook is working with the FBI to investigate a malware attack, a report has said.
Social networking site Facebook faced a third phishing attack on the weekend, with a malware.
Day in Pics: 5th May
Showbiz World - May 5, 2015
62nd National Film Awards