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.
Padodor/Qukart was created by a Russian hacker group called HangUp Team. The original Padodor backdoor source code was used to create this variant, but the backdoor functionality was removed. Padodor/Qukart steals personal information including credit card numbers, logins and passwords that a user types and other sensitive data.