Cisco Security has detected increased activity related to spam e-mail messages that claim to contain an e-card for the recipient. The e-mail message instructs the recipient to follow a link to download the card. However, the link references a malicious .exe file that, when executed, attempts to infect a system with malicious code.
E-mail messages that are related to this threat (RuleID3454) may be associated with the following file: ecard.exe
The ecard.exe file has a file size of 148,577 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x75D7BDB33C303FDC9EFFF43CF4CFBEDE
A variant of the ecard.exe file has a file size of 864,375 bytes. The MD5 checksum is the following string: 0xEA8B41613147B93AC0880C2678D37065
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: You Have Received a Greeting Card!
Nicole has sent you Happy Wishes.The E-Card is valid until 06/14/2011.Click on the link below to download the gift.
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 IronPort systems to protect customers. This report will be updated if there are significant changes or if the risk to end users increases.
Cisco IronPort Virus Outbreak Filters 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 IronPort web security appliances will not be impacted by these attacks. Cisco IronPort 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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