For a brief period this week, cybercriminals managed to infect Google’s and Microsoft’s online ad networks with malicious advertisements that attacked users’ PCs, according to security consultancy Armorize.
The attacks started around Dec. 5 and lasted a few days, sending victims who clicked on the ads to malicious Web pages. Those pages took advantage of known software bugs to install backdoor programs that gave the attackers control of the victims’ PCs, or to install software that made it appear as though the PCs were filled with malicious software…
