The new threat might be even more difficult to remove than CryptoLocker, which plagued users in recent months
Users in North America, Asia Pacific, and Latin America weren't served the ads that spread malware in Europe, Yahoo says.
Yahoo has removed an ad after malware delivery was found by security firm Fox-IT.
A copycat of the widespread Cryptolocker malware is taking aim at P2P file-sharers.
Malware and other attacks are increasingly aimed at mobile devices connecting to business networks, a survey reveals.
We look back at a year when cybersecurity hit very, very close to home.
Cybercriminals are expected to increasingly use ransomware, malware, and hacktivism to move further into the lucrative business market.