Threat Outbreak Alert: Fake Invoice Notification Email Messages on October 30, 2013

2013-10-30T17:54:17
ID CISCO-THREAT-31563
Type ciscothreats
Reporter Cisco
Modified 2013-10-30T17:54:17

Description

Medium

Alert ID:

31563

First Published:

2013 October 30 17:54 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain an invoice notification for the recipient. The text in the email message attempts to convince the recipient to download the attachment to 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 (RuleID7662) may contain the following files:

> TNT UK Limited Self Billing Invoice.zip
TNT UK Limited Self Billing Invoice.exe

The TNT UK Limited Self Billing Invoice.exe file in the TNT UK Limited Self Billing Invoice.zip attachment has a file size of 18,944 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x16DCA97CFB7F6D8B66B5A562EA910492

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

> Subject: TNT UK Limited Self Billing Invoice 6992299169

Message Body:

Download the attachment. Invoice will be automatically shown by double click.

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-October-30 17:54 GMT
    Show Less

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