Threat Outbreak Alert: Fake Tax Return Information Email Messages on August 2, 2013

2013-08-02T12:55:03
ID CISCO-THREAT-30285
Type ciscothreats
Reporter Cisco
Modified 2013-08-02T12:55:03

Description

Medium

Alert ID:

30285

First Published:

2013 August 2 12:55 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain tax return information for the recipient. The text in the email message attempts to convince the recipient to open the attachment and view the details. However, the attachment contains a malicious .exe file that, when executed, attempts to infect the system with malicious code.

Email messages that are related to this threat (RuleID6752) may contain the following files:

> tax_refund.zip
tax_refund.exe

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!

Message Body:

Dear Member
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.
Thanks
Internal Revenue Service
915 Second Avenue, MS W180
Seattle, WA 98174-0041
(206) 220-6011

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
Cisco SenderBase Security Network

Revision History

  • Version | Description | Section | Date
    ---|---|---|---
    1 | Initial Release | | 2013-August-02 12:55 GMT
    Show Less

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