Cisco Security has detected significant activity related to spam e-mail messages that claim to contain a credit card transaction notification for the recipient. The text in the e-mail message attempts to persuade the recipient to open the attachment and view the details. 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 (RuleID5873) may contain the following files:
file in the 04232013.zip
attachment has a file size of 135,680 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xA6278E4A890D15220FAF8E668ECF6564
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Dear Visa card holder,
A recent review of your transaction history determined that your card was used in possible fraudulent transactions. For security reasons the requested transactions were refused. Please carefully review electronic report for your VISA card.
For more details please see the attached transaction report.
Data Protection Officer
VISA EUROPE LIMITED
1 Sheldon Square
London W2 6WH
This electronic mail transmission and any attached files contain information intended for the exclusive use of the individual or entity to whom it is addressed and may contain information belonging to the sender (Visa Europe Limited.) that is proprietary, privileged, confidential and/or protected from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any viewing, copying, disclosure or distributions of this electronic message are violations of federal law. Please notify the sender, by email or telephone (+44 (0)20 7795 0269), of any unintended recipients and delete the original message without making any copies. Thank You
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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