1. A method for detecting malicious software transmission through a web portal, comprising: monitoring, via at least one computer processor, the web portal via a scan operation configured to scan software transmissions for a plurality of known malicious programs; accessing a security scan history that comprises information regarding a plurality of software transmissions transmitted through the web portal and were scanned by the scan operation upon transmission; accessing a current executable file creation activity that comprises information regarding a new software transmission transmitted through the web portal; comparing the current executable file creation activity with the security scan history to detect a bypass of the scan operation by the new software transmission, wherein the new software transmission had exploited a vulnerability of the web portal to bypass the scan operation upon transmission; and preventing creation of a new executable file from the new software transmission after detecting the bypass.