Threat Outbreak Alert: Fake Encrypted Message Notification Email Messages on March 31, 2013

Medium

Alert ID:

33576

First Published:

2014 March 31 15:34 GMT

Version:

1

Summary

• Cisco Security has detected significant activity related to spam email messages that claim to contain a secure message for the recipient. The text in the email message attempts to convince the recipient to open the attachment and follow the instructions. However, the .msg 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 (RuleID9429) may contain the following files:

> SecureMessage.msg
SecureMessage.exe

The SecureMessage.exe file in the SecureMessage.msg attachment has a file size of 18,432 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x4199597c4348e09737511300eb8a9c7b

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

> Subject: LloydsLink reference: 6911685 follow up email and actions to be taken

Message Body:

Lloyds TSB
This is a secure, encrypted message.
Desktop Users:
Open the attachment (SecureMessage.msg) and follow the instructions.
Mobile Users:
To learn how to open this secure message on a mobile device, Click Here.
Protected by the Voltage SecureMail Cloud - Learn More - Secure Your Own Email
SecureMail has a NEW LOOK to better support mobile devices!
Need Help?
Disclaimer: This email and any attachments are confidential and for the sole use of the recipients. If you have received this email in error please notify the sender.
Email Security Powered by Voltage IBE™
Copyright 2002-2014 Voltage Security, Inc. All rights reserved.

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-31 15:34 GMT
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