Threat Outbreak Alert: Fake Bill Payment Notification Email Messages on June 26, 2013

Medium

Alert ID:

29805

First Published:

2013 June 26 18:25 GMT

Version:

1

Summary

• Cisco Security has detected significant activity related to Portuguese-language spam email messages that claim to contain a payment notification for the recipient. The text in the email message attempts to convince the recipient to open the link to view the details. However, the link directs to a .zip file containing a malicious _.cpl _file that, when executed, attempts to infect the system with malicious code.

Email messages that are related to this threat (RuleID6390) may contain the following files:

> _1006632-Proc-Nfe-Doc.zip
1006632-Proc-Nfe-Doc.cpl
_

The 1006632-Proc-Nfe-Doc.cpl file in the 1006632-Proc-Nfe-Doc.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: 0x20FA10F91B05A9711D96DE3CD78E9640

The following text is a sample of the email message that is associated with this threat outbreak:

> Subject: [Redirected] Emissão de NF-e às 23:42:12

Message Body:

Emissão de NF-e (Nota Fiscal Eletrônica)
Prezado (a)
Esta mensagem refere-se à (Nota Fiscal Eletronica) de Serviços No. 2709887 emitida pelo presador de serviços:
Razão Social: Alfa Comercio Ltda
CNPJ do Prestador = 27.865.783/0001-02
Número da NF-e = 2709887-6310970-0011155-0010000-5284210-000066-32
Para baixá-la acesse ou clique no link a seguir:
https: //nfe.fazenda.gov.br/clientes/nfe/download/doc/2709887
Alfa Comercio Ltda
Qualquer dúvida estou a disposição.

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.

Related Links
Cisco Security
Cisco SenderBase Security Network

Revision History

* Version	Description	Section	Date
1	Initial Release		2013-June-26 18:25 GMT
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