Threat Outbreak Alert RuleID20184: Email Messages Distributing Malicious Software on December 18, 2015


Medium Alert ID: 42778 First Published: 2015 December 21 15:25 GMT Version: 1 ## Summary * Cisco Security has detected significant activity related to spam email messages distributing malicious software. Email messages that are related to this threat (RuleID20184) may contain the following files: **Name** | **Size in Bytes** | **MD5 Checksum** ---|---|--- ringcentral_fax883995.doc | 174,080 | 0x6D2EDEEACFB3BBAF4BCB9C9B20D28843 The following text is a sample of the email message that is associated with this threat outbreak: > Subject: **New Fax Message on Thu, 17 Dec 2015 17:21:01 +0300** Message Body: **You Have a New Fax Message From: PEROSPHERE INC (484) 430-9611 Received: Thu, 17 Dec 2015 17:21:01 +0300 Pages: 2 To view this message, open the attachment or use RingCentral Mobile App (download) to have instant access to all your messages on the go. Thank you for using RingCentral.** Cisco security appliances can help protect customers during the critical period between the first exploit of a virus outbreak and the release of vendor antivirus signatures. Cisco Web Security Appliances help secure and control web and email traffic by offering layers of malware protection. Cisco security appliances are automatically updated to help prevent both spam email and hostile web URLs from being passed to the end user. **Related Links** [Cisco Security](<http://www.cisco.com/security>) [Cisco SenderBase Security Network](<http://www.senderbase.org/>) ## Revision History * Version | Description | Section | Date ---|---|---|--- 1 | Initial Release | | 2015-December-21 15:25 GMT Show Less * * * ## Legal Disclaimer * THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products