alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ATTACK_RESPONSE Matahari client"; flow:to_server,established; http.header; content:"Accept|2d|Encoding|3a 20|identity|0d 0a|"; content:"Next|2d|Polling"; fast_pattern; content:"Content|2d|Salt|3a 20|"; pcre:"/Content\x2dSalt\x3a\x20[0-9\.\-]+\x0d\x0a/i"; classtype:trojan-activity; sid:2010795; rev:13; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_19;)