Malware distributors are switching to less suspicious file types
Last week, researchers from the Microsoft Malware Protection Center warned about a new wave of spam emails that carried malicious .LNK files inside ZIP archives. Those files had malicious PowerShell scripts attached to them.
PowerShell is a scripting language for automating Windows system administration tasks. It has been abused to download malware in the past and there are even malware programs written entirely in PowerShell.