Threat Outbreak Alert RuleID22745: Email Messages Distributing Malicious Software on May 8, 2016

Medium

Alert ID:

45077

First Published:

2016 May 9 15:29 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 (RuleID22745) may contain the following files:

Name	Size in Bytes	MD5 Checksum
NF5618910591.zip / NF5618910591.vbs	Not Available	0xBF402E93874E6397569BD1C1E92B8916

The following text is a sample of the email message that is associated with this threat outbreak:

> Subject: **NF-Eletrônicas emitidas e recebidas **
Message Body:

Segue Anexo a Nota Fiscal Eletrônica
de Serviços nº.5534501290 , emitida em 06/05/2016

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
Cisco SenderBase Security Network

Revision History

* Version	Description	Section	Date
1	Initial Release		2016-May-09 15:29 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