An unknown attacker compromised three domains belonging to the U.S. Bureau of Engraving and Printing last month. The attack involved the use of the Eleonore exploit kit, a sophisticated and well-developed toolkit for attackers. The kit hit the market just about a year ago and has been selling steadily ever since, for a price that has now reached about $2,000, an independent security researcher says. The most prevalent exploits are Adobe PDF attacks, with Flash exploits following close behind.
Source: https://threatpost.com/anatomy-eleonore-exploit-kit-060310/74052/