Threat Outbreak Alert: Fake Portuguese Document Attachment E-mail Messages on November 30, 2012
IntelliShield: Threat Outbreak Alert
2012 November 30 16:51 GMT
2012 November 30 21:51 GMT
Cisco Security has detected significant activity on November 30, 2012.
Cisco Security has detected significant activity related to Portuguese-language spam e-mail messages that claim to contain a document for the recipient. The text in the e-mail message attempts to convince the recipient to follow a link and open a .zip file to view the document. However, the link directs the user to a malicious .exe file that, when executed, attempts to infect the system with malicious code.
E-mail messages that are related to this threat (RuleID4859) may contain the following file(s):
The Novos_dados.exe file has a file size of 464,384 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xD02C54F89CF05E24315959D3827FA836
A variant of the Novos_dados.exe file has a file size of 458,752 bytes. The MD5 checksum is the following string: 0x412DBF23FAAA599BD0283597195794C0
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: Documentos para Cadastro!
Oi, conforme combinado,estou encaminhando a copia dos documentos que você pediu. Ja esta tudo Atualizado!
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
systems to protect customers. This report will be updated if there are
significant changes or if the risk to end users increases.
Cisco 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 web security
appliances will not be impacted by these attacks. Cisco appliances are automatically updated to prevent both spam e-mail and
hostile web URLs from being passed to the end user.
The security vulnerability applies to the following combinations of products.
Threat Outbreak Alert
Original Release Base
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.