Malicious advertisements are being 'micro-targeted' at defense companies, Invincea said.

The advertisements redirect victims to the Nuclear exploit kit, which tries to install the Zemot malware.

Authorities seized fake medicines worth US$36 million, but also shut down websites and removed rogue online advertisements.

Facebook said it can detect click fraud despite a company's claim that 80 percent of its ad clicks were generated by bots.

Dasient offers a service to protect advertisement networks and publishers from malicious ads.

Reports now suggest Mozilla's search deal with Google isn't over after all, but the popular browser has plenty going for it either way.

A mobile advertising company has written a JavaScript library that makes Flash advertisements viewable on devices such as the iPad, working around Apple's opposition to Adobe Systems' multimedia platform.

Twitter on Tuesday introduced a new service called Promoted Tweets, which will let companies send ads in the form of ordinary messages, according to a blog posted by co-founder Biz Stone.

Just hours after saying it had ended talks over a possible investment from Microsoft, Yahoo announced a deal with Google to run some of Google's advertisements alongside Yahoo search results.

Microsoft began displaying advertisements to mobile users of its MSN site in the U.S. on Monday.

Google Inc. will soon begin selling video advertisements on the Web, opening a new front in its battle for a bigger slice of the online advertising market.