Cisco Security has detected significant activity related to spam email messages that contain an attachment for the recipient. The email message attempts to convince the recipient to open the attachment for 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 (RuleID9972) may contain the following files:
file in the InternalONLY.zip
attachment has a file size of 16,896 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xF7F5269B1031FF35B8F4DF1000CBCBBB
The following text is a sample of the email message that is associated with this threat outbreak:
**********Important - Internal ONLY**********
File Validity: 14/05/2014
File Format: Adobe Reader
Legal Copyright: Adobe Corporation.
Original Filename: Internal.pdf
********** Confidentiality Notice **********.
This e-mail and any file(s) transmitted with it, is intended for the exclusive use by the person(s) mentioned above as recipient(s).
This e-mail may contain confidential information and/or information protected by intellectual property rights or other rights. If you
are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken
in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this
e-mail in error, please notify the sender and delete the original and any copies of this e-mail and any printouts immediately from
your system and destroy all copies of it.
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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