Offer sig for detect Malformed RTF document

[rmkml <rmkml () ligfy org>]

Hello,

First, thx @r00tbsd and Talos,

Please check sig for detecting Malformed RTF document:

alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-RTF Malformed RTF with PNG header attempt"; 
flow:to_client,established; file_data;
content:"{|5c|rt"; within:4; distance:0; content:"PNG|0d 0a|"; within:5;distance:1;
reference:url,blog.talosintelligence.com/2017/03/how-malformed-rtf-defeats-security.html;
classtype:attempted-user; sid:1; rev:1;)

Please send any comments.

Best Regards
@Rmkml

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Snort-sigs mailing list
Snort-sigs () lists sourceforge net
https://lists.sourceforge.net/lists/listinfo/snort-sigs

http://www.snort.org

Please visit http://blog.snort.org for the latest news about Snort!

Visit the Snort.org to subscribe to the official Snort ruleset, make sure to stay up to date to catch the most <a 
href=" https://snort.org/downloads/#rule-downloads";>emerging threats</a>!