2013 August 2 12:55 GMT
Email messages that are related to this threat (RuleID6752) may contain the following files:
The tax_refund.exe file in the tax_refund.zip attachment has a file size of 308,224 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x3EBD94DB7111C4400206D1D73422D35E
The following text is a sample of the email message that is associated with this threat outbreak:
> Subject: Fwd: 2013 Tax Return Update!
Have you updated your tax return information yet? Please go through the attached report to verify all information is correct to receive your 2013 tax returns.
Internal Revenue Service
915 Second Avenue, MS W180
Seattle, WA 98174-0041
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