Cyber criminals used elaborate multi-stage concept to attack Maplesoft customers. They asked customers to install a malicious “security patch” on behalf of the company. Those who complied proceeded to infect their systems with the Zeus trojan. The software company says it has already closed the hole the attackers exploited to access the database, and that the affected customers have been informed. The company added that intruders were not able to access customers’ payment details during the breach. The attack campaign was specially tailored for the email recipients.”]
Source: http://www.h-online.com/security/news/item/Trojan-attack-on-Maplesoft-customers-1647594.html