#alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Type"; flow:established,to_client; content:"obj"; content:"<<"; within:4; content:"/"; within:50; content:!"Type"; within:4; content:"#"; within:11; pcre:"/\x3C\x3C[^>]*\x2F[^Type](T|#54)(y|#79)(p|#70)(e|#65)/smi"; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; classtype:bad-unknown; sid:2011531; rev:4; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, deployment Perimeter, tag Web_Client_Attacks, signature_severity Major, created_at 2010_09_27, updated_at 2016_07_01;)

Added 2017-08-07 21:04:40 UTC


#alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Type"; flow:established,to_client; content:"obj"; content:"<<"; within:4; content:"/"; within:50; content:!"Type"; within:4; content:"#"; within:11; pcre:"/\x3C\x3C[^>]*\x2F[^Type](T|#54)(y|#79)(p|#70)(e|#65)/smi"; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; classtype:bad-unknown; sid:2011531; rev:3;)

Added 2011-12-09 18:03:33 UTC


alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Type"; flow:established,to_client; content:"obj"; content:"<<"; within:4; content:"/"; within:50; content:!"Type"; within:4; content:"#"; within:11; pcre:"/\x3C\x3C[^>]*\x2F[^Type](T|#54)(y|#79)(p|#70)(e|#65)/smi"; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; classtype:bad-unknown; sid:2011531; rev:3;)

Added 2011-10-12 19:32:12 UTC


alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Type"; flow:established,to_client; content:"obj"; content:"<<"; within:4; content:"/"; within:50; content:!"Type"; within:4; content:"#"; within:11; pcre:"/\x3C\x3C[^>]*\x2F[^Type](T|#54)(y|#79)(p|#70)(e|#65)/smi"; classtype:bad-unknown; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; sid:2011531; rev:3;)

Added 2011-06-30 23:31:11 UTC


alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Type"; flow:established,to_client; content:"PDF-"; depth:300; content:"/"; distance:0; content:!"Type"; within:4; content:"#"; within:11; pcre:"/\x2F[^Type](T|#54)(y|#79)(p|#70)(e|#65)/i"; classtype:bad-unknown; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; sid:2011531; rev:2;)

Added 2011-02-04 17:31:21 UTC


alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Type"; flow:established,to_client; content:"PDF-"; depth:300; content:"/"; distance:0; content:!"Type"; within:4; content:"#"; within:11; pcre:"/\x2F(T|#54)(y|#79)(p|#70)(e|#65)/i"; classtype:bad-unknown; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; reference:url,doc.emergingthreats.net/2011531; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/WEB_CLIENT/WEB_Adobe; sid:2011531; rev:2;)

Added 2010-09-22 11:26:16 UTC

FP: triggers on "/Type" not obfuscated

-- ShaneCastle - 23 Sep 2010


Topic revision: r2 - 2010-09-23 - ShaneCastle
 
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