alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Pages"; flow:established,to_client; content:"|0d 0a 0d 0a|PDF-"; content:"/"; distance:0; content:!"Pages"; within:5; content:"#"; within:13; pcre:"/\x2F(?!Pages)(P|#40)(a|#61)(g|#67)(e|#65)(s|#73)/"; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; classtype:bad-unknown; sid:2011536; rev:5; 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 Pages"; flow:established,to_client; file_data; content:"PDF-"; within:4; content:"/"; distance:0; content:!"Pages"; within:5; content:"#"; within:13; pcre:"/\x2F(?!Pages)(P|#40)(a|#61)(g|#67)(e|#65)(s|#73)/"; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; classtype:bad-unknown; sid:2011536; rev:4;)

Added 2012-04-16 18:46:09 UTC


alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Pages"; flow:established,to_client; content:"PDF-"; depth:300; content:"/"; distance:0; content:!"Pages"; within:5; content:"#"; within:13; pcre:"/\x2F[^Pages](P|#40)(a|#61)(g|#67)(e|#65)(s|#73)/i"; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; classtype:bad-unknown; sid:2011536; rev:2;)

Added 2011-10-12 19:32:14 UTC


alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of Pages"; flow:established,to_client; content:"PDF-"; depth:300; content:"/"; distance:0; content:!"Pages"; within:5; content:"#"; within:13; pcre:"/\x2F[^Pages](P|#40)(a|#61)(g|#67)(e|#65)(s|#73)/i"; classtype:bad-unknown; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; sid:2011536; 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 Pages"; flow:established,to_client; content:"PDF-"; depth:300; content:"/"; distance:0; content:!"Pages"; within:5; content:"#"; within:13; pcre:"/\x2F(P|#40)(a|#61)(g|#67)(e|#65)(s|#73)/i"; classtype:bad-unknown; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; reference:url,doc.emergingthreats.net/2011536; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/WEB_CLIENT/WEB_Adobe; sid:2011536; rev:2;)

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

FP: triggers on "/Pages" not obfuscated

-- ShaneCastle - 23 Sep 2010


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