Russian-based hackers are using malicious software concealed in Twitter images to relay commands and steal data from US computer networks, security researchers said this week.
A hacker group has tapped into email accounts of executives in more than 100 companies that could give them lucrative access to market-moving information, a US security firm said Monday.
Even after Washington pointed the finger at North Korea for the massive cyberattack on Sony Pictures, some experts say the evidence is far from clear cut.
The Russian and Chinese governments are likely behind widespread cyberespionage that has hit targets in the US and elsewhere, two separate security reports said Tuesday.
A hacker group has claimed to have obtained personal data from 12 million Apple iPhone and iPad users by breaching an FBI computer, raising concerns about government tracking, but the FBI said it never had the data.
Hackers have hit back in retaliation for US cyber-spying on Brazil but mistook the US space agency NASA for the National Security Agency (NSA), a news website reported here Tuesday.
A software "worm" evidently unleashed by hackers burrowed through Tumblr on Monday, defacing pages at the popular blogging platform with a vitriolic, expletive-laden message.
The website of the Central Intelligence Agency was briefly inaccessible on Friday after the hacker group Anonymous claimed to have knocked it offline.
Anonymous on Monday gave mixed reactions to a US computer security firm's report that backers of the notorious hacker group were suckered into downloading software that steals online banking information.