Since Windows 7 is the most popular operating system (OS) among PCs, many malware choose to target it. Malware often do so by using Windows’ very own artifacts.  During 2015, Windows artifacts were increasingly abused for malicious operations. For attackers, this is an effective technique, since these artifacts are always present in a Windows environment. Processes that masquerade as valid Microsoft processes raise less suspicion and are likely to be overlooked by ordinary users.

Digging Deeper: How Ransomware and Malware use Microsoft Windows’ Known Binaries