"As part of its cyberforensic methods, Microsoft analyzes product key activation data voluntarily provided by users when they activate Microsoft software, including the IP address from which a given product key is activated," the lawsuit reads. "Microsoft's cyberforensics have identified hundreds of product key activations originating from IP address 74.111.202.3...which is presently assigned to Verizon Online LLC. These activations have characteristics that on information and belief, establish that Defendants are using the IP address to activate pirated software."
Microsoft is seeking to impound all the infringing materials, statutory damages and attorney fees.
Check out a PDF of the lawsuit here.