Threat Outbreak Alert: Fake Faxed Document Notification Email Messages on October 21, 2013

2013-10-21T13:29:41
ID CISCO-THREAT-31386
Type ciscothreats
Reporter Cisco
Modified 2013-10-21T13:29:41

Description

Medium

Alert ID:

31386

First Published:

2013 October 21 13:29 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain a fax notification for the recipient. The text in the email message attempts to convince the recipient to open the attachment and view the details. However, the .zip 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 (RuleID7531) may contain the following files:

> ufwsd-000003280965UK.zip
ufwsd-0000010212013UK.exe

The ufwsd-0000010212013UK.exe file in the uf_wsd-000003280965UK.zip_ attachment has a file size of 26,112 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xC77788267424555791887AC7E32563C3

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

> Subject: Response to Delivered Fax

Message Body:

The attached mail was received in response to a Fax2Mail user
for which you are listed as an administrator.
Taxpayer ID: ufwsd-000003280965UK
Tax Type: Income Tax
Issue: Unreported/Underreported Income (Fraud Application)
Please review your tax income statement on HM Revenue and Customs ( HMRC )
Please complete the attached form
HM Revenue and Customs

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
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Cisco SenderBase Security Network

Revision History

  • Version | Description | Section | Date
    ---|---|---|---
    1 | Initial Release | | 2013-October-21 13:29 GMT
    Show Less

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