Threat Outbreak Alert

Threat Outbreak Alert: Fake Account Billing Invoice Email Messages on July 11, 2013

 
Threat Type:IntelliShield: Threat Outbreak Alert
IntelliShield ID:30046
Version:2
First Published:2013 July 11 13:53 GMT
Last Published:2013 July 12 11:41 GMT
Port: Not available
Urgency:Possible use
Credibility:Confirmed
Severity:Mild Damage
 
Version Summary:Cisco Security Intelligence Operations has detected significant activity on July 11, 2013.
 

Description
 
Cisco Security Intelligence Operations has detected significant activity related to spam email messages that claim to contain an account billing invoice 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 (RuleID6553 and RuleID6553KVR) may contain the following files:

TNT UK Limited Self Billing Invoice.zip
TNT UK Limited Self Billing Invoice.exe
TNT UK Limited Self Billing Invoice (2).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 117,248 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x6E748EEDA0C8EF7A36ED79CBE8C6682E

The TNT UK Limited Self Billing Invoice (2).exe file in the TNT UK Limited Self Billing Invoice.zip attachment has a file size of 119,808 bytes. The MD5 checksum is the following string: 0xF1862F43775852A3DC64CB277611EBA6

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

Subject: TNT UK Limited Self Billing Invoice 5934600276

Message Body:

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


Cisco Security Intelligence Operations 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 Intelligence Operations
Cisco SenderBase Security Network
 
Alert History
 
Version 1, July 11, 2013, 1:53 PM: Cisco Security Intelligence Operations has detected significant activity on July 11, 2013.



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
IntelliShieldThreat Outbreak Alert Original Release Base

Associated Products:
N/A




Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.


LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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