Cisco Security has detected significant activity related to spam email messages that claim to contain an invoice change request for the recipient. The text in the email message attempts to convince the recipient to open the attachment to amend the invoice. However, the .zip
attachment contains a malicious .exe
file that, when executed, attempts to infect the system with malicious code.
Email messages that are related to this threat (RuleID7694) may contain the following files:
file in the Revised PI.zip
attachment has a file size of 766,976 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x1519F9CEA19E1A64FAFFA7E31AD9989C
The following text is a sample of the email message that is associated with this threat outbreak:
Subject: Re: Re:Revised proforma Invoice
The PI you sent can not work for us and needs some amendments.
Kindly check the attached PI and note that;
1) We agreed on 30% advance but PI is stated 50% advance.
2) Expected time of deliver is different from earlier agreed shipment date.
3) You had mentioned in the Origin of cargo and in the place of Unit
FOB price? Please advice better explain it for us.
4) Pay attention to the Question marks we added to the PI to draw your
attention to complete these parts.
Amend and send the revised PI so we can make the down payment immediately.
(Sourcing and procurement manager)
Add: C/ Primavera nº50-52, Polígono Industrial Las Monjas
28850 TORREJÓN DE ARDOZ - MADRID (Spain)
Tel. (+34) 916766676 - (+34) 916776175
Fax: (+34) 916757813
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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