Trojans are malicious applications that pose themselves as legitimate software in order to trick users to install them. Once on the victim's machine, it may run any number of malicious process to steal vital information or inflict damage to other software.
There exists a remote code execute vulnerability in the Chinese payment processor, Alipay, password input control "pta.dll". A remote attacker who successfully exploit these vulnerabilities can completely take control of the affected system. The original article can be found at http://ruder.cdut.net.