Cisco Security has detected significant activity related to spam e-mail messages that claim to contain a Security Update 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 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 (RuleID4461KVR) may contain the following file:
The KB2690533.exe file in the attachment has a file size of 16,898 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x1782ECC4911DFF3CA2854B4B3957127E
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: Security Update
Because of the office network interfaces changed.Please download the Security Update fot windows XP (KB2690533),and install it.
Download address: hxxp://www.microsoft.com/en-us/download/KB2690533.exe
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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