 The worm, like Stuxnet, has a valid, but abused digital signature, and collects information to prepare for future attacks.Mikko Hyppönen, Chief Research Officer for F-Secure, said that Duqu's kernel driver, JMINET7.SYS, was so similar to Stuxnet's MRXCLS.SYS that F-Secure's back-end system thought it was Stuxnet.Hyppönen further said that the key used to make Duqu's own digital signature (only observed in one case) was stolen from C-Media, located in Taipei, Taiwan.