According to Computerworld, the Zeus malware has seen some updated new functions after its source code was leaked earlier this year. Many of the functions have also been incorporated into a similar type of malware called SpyEye.
The tweaks are relatively minor at this point. For example, there have been changes to ensure that SpyEye evades security software programs. Also, SpyEye's developers have made it trickier for security researchers to follow and monitor its command-and-control servers that host configuration files. In a blog post, Jorge Mieres, a malware analyst with Kaspersky Lab, says:
It is clear that from now on, more new crimeware will be based on ZeuS code. New developers, hoping to profit from cyber crime, will attempt to create their own new alternatives based on this source.