2013 December 19 17:15 GMT
2013 December 23 14:11 GMT
Email messages that are related to this threat (RuleID8263 and RuleID8263KVR) may contain the following files:
The MSG-0923-V9331.exe file in the _MSG-0923-V9331.zip _attachment has a file size of 90,112 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x2AF8D9DA7D42370CFCB2550DFAECBBEE
The MSG-3721-V9893.exe file in the MSG-3721-V9893.zip attachment has a file size of 90,112 bytes. The MD5 checksum is the following string: 0x69C0AF0EF392097F576B83CEE2375608
The following text is a sample of the email message that is associated with this threat outbreak:
> Subject: New Voice Message Notification
This is an automated email, please don't reply.
Voice Message Notification
You received a new message from Skype voicemail service.
Time of Call: 17 Dec 2013 10:20:24 -0400
Length of Call: 38sec
Listen to the message
in the attached file.
?2003-2013 Skype and/or Microsoft. The Skype name, associated trademarks and logos and the “S”
logo are trademarks of Skype or related entities.
Skype, associated trademarks and logos and the "S" symbol are trademarks of Skype Limited.
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