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):
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.
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