alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ACTIVEX Adobe browser document ActiveX DoS Attempt"; flow:established,to_client; content:"clsid"; nocase; content:"CA8A9780-280D-11CF-A24D-444553540000"; nocase; distance:0; content:"src"; nocase; pcre:"/<OBJECT\s+[^>]*classid\s*=\s*[\x22\x27]?\s*clsid\s*\x3a\s*\x7B?\s*CA8A9780-280D-11CF-A24D-444553540000/si"; reference:url,www.packetstormsecurity.nl/0911-exploits/acropdf-dos.txt; classtype:attempted-user; sid:2010726; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, confidence Medium, signature_severity Major, tag ActiveX, updated_at 2019_09_27;)