Threat Outbreak Alert: Fake Tax Return Documents Email Messages on March 26, 2014

2014-03-26T20:29:16
ID CISCO-THREAT-33522
Type ciscothreats
Reporter Cisco
Modified 2014-03-26T20:29:16

Description

Medium

Alert ID:

33522

First Published:

2014 March 26 20:29 GMT

Version:

1

Summary

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

Email messages that are related to this threat (RuleID9374) may contain the following files:

> New Data 03262014.zip
New Data 03262014.scr

The New Data 03262014.scr file in the New Data 03262014.zip attachment has a file size of 61,952 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x0099162ED44B475AF465D694BDBD799A

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

> Message Body:

I forward this file to you for review. Please open and view it.
Attached are Individual Income Tax Returns and W-2s for 2012 and 2013, plus an accountant's letter.
This email message may include single or multiple file attachments of varying types.
It has been MIME encoded for Internet email transmission.

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 | | 2014-March-26 20:29 GMT
    Show Less

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