Cisco Security has detected significant activity related to Russian language spam e-mail messages that claim to contain a delivery notification for the recipient. The text in the e-mail message attempts to convince the recipient to open the attachment and view the invoice. However, the attachment contains a malicious .scr
file that, when executed, attempts to infect the system with malicious code.
E-mail messages that are related to this threat (RuleID4910 and RuleID4910KVR) may contain the following files:
The invoice.scr file in the invoice.zip attachment has a file size of 137,216 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x81B65115C26216D695B2F5659C733474
The image.scr file in the QUOTATION.zip attachment has a file size of 1,273,856 bytes. The MD5 checksum is the following string: 0xF5773E91674B25487D7566A0EAB9C146
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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