I enclose the following link that could help solve the problem
http://www.antivirus-blog.com/removal-guides/remove-virusheuradware-win32-kranet-virus-removal/
Most antivirus vendors make up their own names for malware. usually the vendor maintains an online database with information on the malware.
analysis of the name of your malware might also help you:
Gen:Adware generic adware
.heur: detected by heuristics scan
some random string; might indicate the file, a file signature or anything else.
From that, my educated guess would be your AV found a suspicious file with heuristics but failed to identify the actual threat. Check if the affected file is a temporary internet file/cookie; if so: do not worry too much, clean your tempfiles, and in the future stay away from malicious sites.