AsusTEK asio.sys driver accepts IOCTLs that allow the user to freely manipulate MSRs.
March 4th, 2016: contacted AsusTEK via mail and online chat. AsusTEK blamed it on Microsoft!
March 5th, 2016: contacted the Microsoft security response center.
March 10th, 2016: Microsoft acknowledged and asked AsusTEK to fix.
March 16th, 2016: AsusTEK refuse to admit their mistakes.
March 17th, 2016: public disclosure, assigned DWF-2016-91001.
IOCTL 0xA0406458 for reading MSR values - the MSR number is sent as a
single DWORD in the input buffer, and the output value is a single QWORD in
the output buffer.
IOCTL 0xA040645C for writing MSR values - the MSR number is the first DWORD
and the value is the following QWORD in the input buffer.
POC code and blog entry