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Threat Outbreak Alert

Threat Outbreak Alert: Fake Paychex Insurance Agency Secure File Attachment E-mail Messages on January 16, 2013

 
Threat Type:IntelliShield: Threat Outbreak Alert
IntelliShield ID:27899
Version:1
First Published:2013 January 16 19:48 GMT
Last Published:2013 January 16 19:48 GMT
Port: Not available
Urgency:Possible use
Credibility:Confirmed
Severity:Mild Damage
 
Version Summary:Cisco Security Intelligence Operations has detected significant activity on January 16, 2013.
 

Description
 
Cisco Security Intelligence Operations has detected significant activity related to spam e-mail messages that claim to contain personal information from Paychex Insurance Agency for the recipient. The text in the e-mail message attempts to persuade the recipient to open the attachment to view the secure electronic file. However, the .zip attachment contains a malicious .exe file that, when executed, attempts to infect the system with malicious code.

E-mail messages that are related to this threat (RuleID5088) may contain the following files:

pyx_8839187_1_HNB.zip
pyx_8839187_1_HNB.exe


The pyx_8839187_1_HNB.exe file in the pyx_8839187_1_HNB.zip attachment has a file size of 202,520 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xDC9174B5A8D90040CC1668CA6545D485

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

Subject: Paychex Insurance Agency

Message Body:

The security of your personal information is of the utmost importance to Paychex, so we have sent the attached as a secure electronic file.
Note: The attached file contains encrypted data. In order to view the file, you must have already installed the decryption software that was previously provided by Paychex.
If you have any question please call us at 800-472-0072, option 4. Representatives are available to assist you Monday through Thursday between 8:00 a.m. and 8:00 p.m. ET and Friday between 8:00 a.m. and 6:00 p.m. ET.
Paychex Insurance Agency
The information contained in this message may be privileged, confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify your representative immediately and delete this message from your computer. Thank you.


Cisco Security Intelligence Operations analysts examine real-world e-mail 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 e-mail 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. E-mail 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 e-mail and hostile web URLs from being passed to the end user.

Related Links
Cisco Security Intelligence Operations
Cisco Threat Operations Center
Cisco SenderBase Security Network
 
Alert History
 
Initial Release


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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