An approach is provided that receives a set of actual hardware power consumption details and a set of software activity details with all of the details pertaining to the use of a computer system at a first time. Based on the set of software activity details, the approach determines a set of expected hardware power consumption details. The set of actual hardware power consumption details are compared to the set of expected hardware power consumption details. If the comparison identifies variances between the actual and expected data, then a security threat is flagged and threat responses are performed.