According to one embodiment, a threat detection platform is integrated with at least one virtual machine that automatically performs a dynamic analysis of a received object and monitors the processing during the dynamic analysis for a change to a file system within the virtual machine wherein the change involves a lure file placed in the file system. The file system is configured based on a received configuration file. Upon detection of a change in the file system associated with a lure file, the changes associated with the lure file during processing are compared to known file activity patterns of changes caused by file altering malware to determine whether the object includes file altering malware.