The leak of point-of-sale malware source code is a double-edge sword to researchers who view it as boon to research, but a headache when it comes to inspiring future variants and attacks.

Old nemeses die hard, especially when you’re banking malware named ZeuS. According to Denmark-based Heimdal Security, the potent 9-year-old malware ZeuS has morphed into the up-and-coming Atmos malware – now targeting banks in France. Researchers are warning that the criminals behind Atmos have been putting the finishing touches on this latest malware threat – perfecting how,...