Cisco Security has detected significant activity related to Portuguese-language spam e-mail messages that claim to contain documents for registration for the recipient. The text in the e-mail message attempts to persuade the recipient to open the link to verify the documents. However, the link contains a .zip
file containing a malicious .exe
file that, when executed, attempts to infect the system with malicious code.
E-mail messages that are related to this threat (RuleID4750) may contain the following files:
file in the dados.zip
archive has a file size of 460,288 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xD1E62770F34D06CE04819A86851E6B1B
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: Documentos para o cadastro
Oi, estou encaminhando as cópias dos documentos que você pediu.
verifique se são essas mesmo e me responda
Tenha um bom dia
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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