Talos Rules 2019-11-02
This release adds and modifies rules in several categories.

These rules provide coverage against a use after free vulnerability in Google Chrome's blink webaudio module. This vulnerability is being actively exploited in the wild, and is referenced as CVE-2019-13720

Talos has added and modified multiple rules in the browser-chrome and server-webapp rule sets to provide coverage for emerging threats from these technologies.

Change logs

2019-11-02 22:49:02 UTC

Snort Subscriber Rules Update

Date: 2019-11-02

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091500.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:52071 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52070 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52069 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52068 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52067 <-> DISABLED <-> SERVER-WEBAPP Squid HTTP Proxy cachemgr.cgi denial of service attempt (server-webapp.rules)

Modified Rules:



2019-11-02 22:49:02 UTC

Snort Subscriber Rules Update

Date: 2019-11-02

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091401.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:52071 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52067 <-> DISABLED <-> SERVER-WEBAPP Squid HTTP Proxy cachemgr.cgi denial of service attempt (server-webapp.rules)
 * 1:52068 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52069 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52070 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)

Modified Rules:



2019-11-02 22:49:02 UTC

Snort Subscriber Rules Update

Date: 2019-11-02

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091300.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:52071 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52067 <-> DISABLED <-> SERVER-WEBAPP Squid HTTP Proxy cachemgr.cgi denial of service attempt (server-webapp.rules)
 * 1:52068 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52069 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52070 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)

Modified Rules:



2019-11-02 22:49:02 UTC

Snort Subscriber Rules Update

Date: 2019-11-02

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091200.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:52071 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52067 <-> DISABLED <-> SERVER-WEBAPP Squid HTTP Proxy cachemgr.cgi denial of service attempt (server-webapp.rules)
 * 1:52068 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52069 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52070 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)

Modified Rules:



2019-11-02 22:49:02 UTC

Snort Subscriber Rules Update

Date: 2019-11-02

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091101.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:52071 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52067 <-> DISABLED <-> SERVER-WEBAPP Squid HTTP Proxy cachemgr.cgi denial of service attempt (server-webapp.rules)
 * 1:52068 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52069 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52070 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)

Modified Rules:



2019-11-02 22:49:02 UTC

Snort Subscriber Rules Update

Date: 2019-11-02

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 3000.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:52067 <-> DISABLED <-> SERVER-WEBAPP Squid HTTP Proxy cachemgr.cgi denial of service attempt (snort3-server-webapp.rules)
 * 1:52071 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (snort3-malware-other.rules)
 * 1:52069 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (snort3-browser-chrome.rules)
 * 1:52068 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (snort3-browser-chrome.rules)
 * 1:52070 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (snort3-malware-other.rules)

Modified Rules:



2019-11-02 22:49:02 UTC

Snort Subscriber Rules Update

Date: 2019-11-02

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2990.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:52068 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52070 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52071 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52067 <-> DISABLED <-> SERVER-WEBAPP Squid HTTP Proxy cachemgr.cgi denial of service attempt (server-webapp.rules)
 * 1:52069 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)

Modified Rules:



2019-11-02 22:49:02 UTC

Snort Subscriber Rules Update

Date: 2019-11-02

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2983.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:52068 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52069 <-> ENABLED <-> BROWSER-CHROME Google Chrome blink webaudio module use after free attempt (browser-chrome.rules)
 * 1:52067 <-> DISABLED <-> SERVER-WEBAPP Squid HTTP Proxy cachemgr.cgi denial of service attempt (server-webapp.rules)
 * 1:52070 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)
 * 1:52071 <-> ENABLED <-> MALWARE-OTHER known malicious browser profiler script download attempt (malware-other.rules)

Modified Rules: