Threat Outbreak Alert: Fake Package Delivery Failure Notice E-mail Messages on November 20, 2012
IntelliShield: Threat Outbreak Alert
2012 November 19 21:27 GMT
2012 November 21 15:42 GMT
Cisco Security Intelligence Operations has detected significant activity on November 20, 2012.
Cisco Security Intelligence Operations has detected significant activity related to spam e-mail messages that claim to contain a package delivery failure notification for the recipient. The text in the e-mail message attempts to convince the recipient to follow a link to reschedule or to check on the status of the delivery. However, the link directs the user to a .zip file containing a malicious .scr file that, when executed, attempts to infect the system with malicious code.
E-mail messages that are related to this threat (RuleID4818, RuleID4821, and RuleID4818KVR) may contain the following files:
The pdf_RW273018395CA.scr file in the pdf_RW273018395CA.zip archive has a file size of 328,704 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x7B0291C64C98752F2E5095952FB5F7F3
The pdf_trkRW184018395CA.scr file in the pdf_trkRW184018395CA.zip attachment has a file size of 188,416 bytes. The MD5 checksum is the following string: 0x17F79ADB21B0CEC082466EF5C08D38DA
The pdf_trk_invoice.scr file in the pdf_RW273018395CA.zip attachment has a file size of 186,880 bytes. The MD5 checksum is the following string: 0xB79D1EC0F5ADFF48F84904AE95D2B4FC
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Cisco Security Intelligence Operations 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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