Threat Outbreak Alert RuleID17453: Email Messages Distributing Malicious Software on August 20, 2015

Email Messages Distributing Malicious Software Alert on August 20, 2015. Cisco Security detected significant activity related to spam emails distributing malware. Email messages may contain malicious files named "Formsheet_for_Your_perusal_5645880.zip" and "Fax9-388535317-0690576943-86.zip", among others. Sample email subjects include "Short-term account management restraint" and "eFax message from Cristal Bins". Attachments are used to trick recipients into opening malware. Cisco security appliances provide protection against virus outbreaks and automatically update to prevent spam emails and hostile web URLs