Cisco Security has detected significant activity related to spam e-mail messages that claim to contain a secure message for the recipient. The text in the e-mail message attempts to convince the recipient to open the attachment and view the message. 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 (RuleID5132) may contain the following files:
file in the securedoc.zip
attachment has a file size of 113,664 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x4D1C7A7550A3E476C3A6A75F05B1D8B7
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: You have received a secure message
You have received a secure message
Read your secure message by opening the attachment, securedoc.html. You will be prompted to open (view) the file or save (download) it to your computer. For best results, save the file first, then open it with Internet Explorer.
If you have concerns about the validity of this message, please contact the sender directly. For questions please contact the Citi Secure Email Help Desk at (866) 535-2504.
First time users - will need to register after opening the attachment.
About Email Encryption - http://www.citi.com/citi/citizen/privacy/email.htm
Cisco Security 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.
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