2013 November 22 15:13 GMT
Email messages that are related to this threat (RuleID7977) may contain the following files:
The HOTFIX_patch_KB###.exe_ file in the HOTFIX-Patch58AD2CD181BB26064931.zip attachment has a file size of 377,344 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xB15FBBF5FC8300C988E880E0B9B9AB9F
The following text is a sample of the email message that is associated with this threat outbreak:
> Message Body:
Important System Update - requires immediate action
It's highly important to install this security update due to the new malware circulating over the net.
To complete the action please double click on the system patch KB923029 in the attachment.
The installation will run in the silent mode.
Please pay attention to this matter and inform us in case there is a problem.
Director of Data Services
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.
A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products