VRT Advisories


October 2013 Archive

VRT Rules 2013-10-31

Sourcefire VRT Rules Update

Date: 2013-10-31

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the blacklist, exploit-kit, file-multimedia, file-office, file-pdf, indicator-compromise, malware-cnc, os-mobile and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 31, 2013



VRT Rules 2013-10-29

Sourcefire VRT Rules Update

Date: 2013-10-29

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the blacklist, browser-firefox, browser-ie, browser-plugins, exploit-kit, file-flash, file-identify, file-office, file-other, file-pdf, indicator-obfuscation, malware-cnc, malware-other, malware-tools, os-windows and server-other rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 29, 2013



VRT Rules 2013-10-22

Sourcefire VRT Rules Update

Date: 2013-10-22

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the app-detect, blacklist, browser-ie, browser-other, browser-plugins, exploit-kit, file-java, file-multimedia, file-other, file-pdf, indicator-compromise, malware-backdoor, malware-cnc, os-windows, protocol-icmp, protocol-tftp, pua-adware and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 22, 2013



VRT Rules 2013-10-17

Sourcefire VRT Rules Update

Date: 2013-10-17

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the app-detect, blacklist, browser-ie, exploit-kit, file-image, file-pdf, malware-cnc and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 17, 2013



VRT Rules 2013-10-15

Sourcefire VRT Rules Update

Date: 2013-10-15

Synopsis:

This release contains updated base policies and also adds and modifies rules in several categories.

Details:

This SEU/SRU contains updated base policies for use in your Sourcefire devices.

To help customers understand these changes, we are taking this opportunity to explain the process used by the VRT for deciding how rules are assigned to each policy.

The main metric used is the CVSS score assigned to each vulnerability that might be covered by a rule. For more information on CVSS please visit http://www.first.org/cvss. The second criteria is temporal-based and concerns the age of a particular vulnerability. The final criteria is the particular area of coverage for the rule. So for example, SQL Injection rules are considered to be important enough to have influence when being considered for policy inclusion. Note that, the vulnerabilities covered by the rules in these categories are considered important regardless of age.

The considerations for each policy are described below.

Connectivity over Security Base Policy:

1. CVSS Score must be 10 2. Age of the vulnerability: Current year (2013 for example) Last year (2012 in this example) Year before last (2011 in this example) 3. Rule Category Not used for this policy

Balanced Base Policy:

1. CVSS Score 9 or greater 2. Age of the vulnerability: Current year (2013 for example) Last year (2012 in this example) Year before last (2011 in this example) 3. Rule Category Malware-Cnc Blacklist SQL Injection Exploit-kit

Security over Connectivity Base Policy:

1. CVSS Score 8 or greater 2. Age of the vulnerability: Current year (2013 for example) Last year (2012 in this example) Year before last (2011 in this example) Year prior (2010 in this example) 3. Rule Category Malware-Cnc Blacklist SQL Injection Exploit-kit App-detect

All new rules are placed into the policies based on these criteria. Every year during the third quarter of the year, the policies will be re-assessed and rules from previous years, as the vulnerabilities age, will be removed from the policy to keep the policy compliant with our temporal selection criteria. Thus, in the third quarter of 2014, the rules from 2011 will be removed from the “Connectivity over Security” and “Balanced” policies while the rules from 2010 will be removed from the “Security over Connectivity” policy. If rules move between categories, their presence in policies will also be decided based on the category selection process. Likewise, should the CVSS score change for a particular vulnerability that is covered by a rule, its presence in a policy based on the CVSS metric is also re-assessed.

Rules in the listed policies are evaluated on a rule by rule basis.

Policies that will be affected:

Those policies that create or have created a policy based on one of the Sourcefire base policies. Those policies that have not modified any of the rule states manually.

The Sourcefire VRT has also added and modified multiple rules in the blacklist, browser-chrome, browser-firefox, browser-ie, browser-other, browser-plugins, browser-webkit, content-replace, exploit-kit, file-executable, file-flash, file-identify, file-image, file-java, file-multimedia, file-office, file-other, file-pdf, indicator-compromise, indicator-obfuscation, indicator-scan, indicator-shellcode, malware-cnc, netbios, os-linux, os-mobile, os-other, os-solaris, os-windows, policy-other, policy-social, policy-spam, protocol-dns, protocol-ftp, protocol-icmp, protocol-imap, protocol-nntp, protocol-rpc, protocol-scada, protocol-services, protocol-snmp, protocol-telnet, protocol-tftp, protocol-voip, pua-adware, pua-other, pua-p2p, pua-toolbars, server-apache, server-iis, server-mail, server-mssql, server-mysql, server-oracle, server-other and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 15, 2013



VRT Rules 2013-10-14

Sourcefire VRT Rules Update

Date: 2013-10-14

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the browser-ie, browser-plugins and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 14, 2013



VRT Rules 2013-10-10

Sourcefire VRT Rules Update

Date: 2013-10-10

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the browser-ie, exploit-kit and malware-cnc rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 10, 2013



VRT Rules 2013-10-08

Sourcefire VRT Rules Update

Date: 2013-10-08

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting products from Microsoft Corporation.

Details:

Microsoft Security Advisory MS13-080:
Internet Explorer suffers from programming errors that may lead to remote code execution.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 1, SIDs 28151, 28158 through 28160, 28163, 28191, 28204, and 28207 through 28208.

Microsoft Security Advisory MS13-082:
Programming errors in the .NET Framework may lead to remote code execution.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 1, SIDs 28161 through 28162 and 28202 through 28203.

Microsoft Security Advisory MS13-084:
Microsoft SharePoint Server suffers from a coding error that may lead to remote code execution.

A rule to detect attacks targeting this vulnerability is included in this release and is identified with GID 1, SID 28201.

Microsoft Security Advisory MS13-086:
Microsoft Word suffers from coding errors that may lead to remote code execution.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 1, SIDs 28205 and 28206.

The Sourcefire VRT has added and modified multiple rules in the blacklist, browser-ie, browser-plugins, exploit-kit, file-image, file-office, file-other, indicator-compromise, malware-cnc, protocol-voip, pua-adware, server-mail and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 08, 2013



VRT Rules 2013-10-03

Sourcefire VRT Rules Update

Date: 2013-10-03

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the browser-ie, browser-plugins, exploit-kit, file-java, file-office, file-other, malware-cnc and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 03, 2013



VRT Rules 2013-10-01

Sourcefire VRT Rules Update

Date: 2013-10-01

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the app-detect, blacklist, browser-ie, browser-plugins, exploit-kit, file-java, file-multimedia, file-office, file-pdf, malware-cnc, os-mobile, os-solaris, protocol-ftp, protocol-rpc, server-oracle and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Rule Pack Summary:

For a complete list of new and modified rules, click here.

Warning:

Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.

why subscribe? || download rules

Posted by on Oct 01, 2013