2014 February 27 19:33 GMT
Email messages that are related to this threat (RuleID8987) may contain the following files:
The 3_777.exe file in the 3_777.zip attachment has a file size of 97,128 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x1F724CA2AB4A5C6B485CAD4E519402CB
The following text is a sample of the email message that is associated with this threat outbreak:
> Subject: Tax Refund
After the last annual calculations of your fiscal activity, we have determined that you are eligible to receive a tax refund of 2468.50 GBP. Please check attached file for more detailed information.
Note: A refund can be delayed a variety of reasons, for example submitting invalid records or applying after deadline.
If you have any concerns regarding the validity of this or any emails received from HMRC go to our Online Security pages for more information by using the web address below. hxxp://www.hmrc.gov.uk/security/index.htm
2014, all rights reserved
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.
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