Cisco Security has detected significant activity related to Portuguese-language spam email messages that claim to contain an invoice notification for the recipient. The text in the email message attempts to convince the recipient to open the attachment and view the details. However, the .zip
attachment contains a malicious .cpl
file that, when executed, attempts to infect the system with malicious code.
Email messages that are related to this threat (RuleID6333) may contain the following files:
file in the ProcNfe-01278006491916062013-.PDF.zip
attachment has a file size of 80,896 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x4FF7392296D2D904DB4A17EBE6753B91
The following text is a sample of the email message that is associated with this threat outbreak:
Subject: ATT. Emisso de Nota Fiscal
Segue Anexo a Nota Fiscal Eletrônica de Serviços nº. 17240, emitida em Abril/2013.
Este arquivo deve ser armazenado.
Segue em anexo a cópia da NOTA FISCAL em PDF onde está a relação dos pedidos e demais detalhes do pagamento.
Informamos que o valor foi debitado com sucesso!
Qualquer dúvida em relação aos pedidos entrar em contato conosco que explicaremos!
J.A. Elétrica LTDA agradece a preferência!
Camila C. Silva
J.A. Elétrica LTDA.
Cisco Security analysts examine real-world email 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 email 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. Email 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 email and hostile web URLs from being passed to the end user.
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