alert tcp $EXTERNAL_NET any -> $HOME_NET 2775 (msg:"ET EXPLOIT Now SMS/MMS Gateway SMPP BOF Vulnerability"; flow:established,to_server; content:"|00 00 00 04|"; content:"|00 00 00 01|"; distance:1; pcre:"/[a-zA-Z0-9]{1000,}/i"; reference:bugtraq,27896; reference:url,aluigi.altervista.org/adv/nowsmsz-adv.txt; classtype:web-application-attack; sid:2007875; rev:4; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)