Cisco Security has detected significant activity related to spam email messages that claim to contain a fax document delivery 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 .scr
file that, when executed, attempts to infect the system with malicious code.
Email messages that are related to this threat (RuleID7187) may contain the following files:
file in the pdf_efax_6785462001.zip
attachment has a file size of 351,957 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xDECB57DD18251FDD3DBAB1670DD09375
The following text is a sample of the email message that is associated with this threat outbreak:
Subject: eFax message from 16785462001 - 1 page(s), Caller-ID: 678-546-2001
Fax Message [Caller-ID: 678-546-2001]
You have received a 1 page fax at 2013-09-12 06:56:56 CDT.
* The reference number for this fax is min1_did13-1368734175-6785462001-49.
View this fax online, on our website : hxxp://www.efax.com/faxes/view_fax.aspx?fax_id=6785462001
Please visit www.eFax.com/en/efax/twa/page/help if you have any questions regarding this message or your service.
Thank you for using the eFax service!
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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