Threat Outbreak Alert: Malicious Software Distributed Within Email Messages on October 30, 2013

2013-10-30T14:46:47
ID CISCO-THREAT-31560
Type ciscothreats
Reporter Cisco
Modified 2013-10-30T14:46:47

Description

Medium

Alert ID:

31560

First Published:

2013 October 30 14:46 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain an attachment for the recipient. The email message attempts to convince the recipient to open the attachment. However, the ._zip _attachment contains a malicious ._pdf _file that, when executed, attempts to infect the system with malicious code.

Email messages that are related to this threat (RuleID7661) may contain the following files:

> proforma invoice.zip
proforma invoice.pdf

The proforma invoice.pdf _file in the _proforma invoice.zip attachment has a file size of 1,125,421 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x4C981DF033713C90D2527616600D2676

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.

Related Links
Cisco Security
Cisco SenderBase Security Network

Revision History

  • Version | Description | Section | Date
    ---|---|---|---
    1 | Initial Release | | 2013-October-30 14:46 GMT
    Show Less

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