Threat Outbreak Alert: Email Messages with Malicious Link on September 4, 2013


Medium Alert ID: 30668 First Published: 2013 September 5 19:29 GMT Version: 1 ## Summary * Cisco Security has detected significant activity related to Portuguese-language spam email message for the recipient. The text in the email message attempts to convince the recipient to open the link to view the details. However, the link redirects to a _.zip_ file containing a malicious _.cp_l file that, when executed, attempts to infect the system with malicious code. Email messages that are related to this threat (RuleID7017) may contain the following files: > _NotaEletronica.zip NotaEletronica.cpl_ The _NotaEletronica.cpl_ file in the _NotaEletronica.zip_ archive has a file size of 25,600 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x05E1BD2924C6036CA6C556365D128B40 The following text is a sample of the email message that is associated with this threat outbreak: > Message Body: **CONFIRA SUA NOTA ELETRONICA Descupe os transtorno gostariamos de nao perdemos você como cliente! 18:27:49 CNPJ do prestador = 10.612.035/0001-35 Por motivo de segurança estamos enviando sua NFE N°1949343 NUMERO= NF-e 19458964721.0187930124.587023659.842710326 W.A- ATACADISTA-Ltda Qualquer dúvida estamos a disposição.** Cisco Security analysts examine real-world email traffic data that is collected from over 100,000 contributing organizations worldwide. This data helps provide a range of information about and analysis of global email security threats and trends. Cisco will continue to monitor this threat and automatically adapt systems to protect customers. This report will be updated if there are significant changes or if the risk to end users increases. Cisco security appliances protect customers during the critical period between the first exploit of a virus outbreak and the release of vendor antivirus signatures. Email that is managed by Cisco and end users who are protected by Cisco Web Security Appliances will not be impacted by these attacks. Cisco security appliances are automatically updated to 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 | | 2013-September-05 19:29 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