Cisco Security has detected significant activity related to spam e-mail messages that claim to contain a court notice for the recipient. The text in the e-mail message tries to convince the recipient to open the attachment to 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 (RuleID4037KVR) may contain the following files:
The Lawsuit_From_Legal Support_22nd_of_March.exe file in the Lawsuit.zip attachment has a file size of 58,368 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xFC1DCCE6644E425C7C68CCCCBAFCE8B6
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: Court is aCourt notification
The company "New Balance" has sued you for sending spam.
A copy of the lawsuit is attached to the letter,
U.S. Legal Support
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.
Cisco Threat Operations Center
Cisco SenderBase Security Network