Although the hack didn't breach the mobile payment app itself, consumer confidence may be shaken.
McAfee found that 60 percent of 504 surveyed IT professionals prioritize security as the primary driver of network design.
The guidance, developed by a PCI Special Interest Group, will help merchants educate staff on protecting cardholder data.
The Italian spyware company had its manuals posted online that detail how thoroughly an infected user's actions can be monitored.
The research presents techniques for distinguishing legit data leaks from false claims.