BZub is a family of Trojan-Spy malware. BZub variants create files in the Windows System directory and attempt to steal logons, passwords, PINs, check words, and other information related to Online Banking.
Additional Details
BZub trojans are spammed to a large number of people as attachments to e-mail messages. Past attachment names have been rechnung.exe. BZub drops a keylogger and spies against customers of several banks.