alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious Accept in HTTP POST - Possible Alphacrypt/TeslaCrypt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.accept; pcre:"/^(?!m(?:ultipart|essage|odel)|a(?:pplication|udio|ccept)|(?:exampl|imag)e|video|text|\*)/i"; http.header_names; content:"|0d 0a|Accept|0d 0a|"; depth:10; fast_pattern; content:!"Referer"; content:"Accept"; reference:md5,35a6de1e8dbea19bc44cf49ae0cae59e; classtype:trojan-activity; sid:2022502; rev:7; metadata:created_at 2016_02_11, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_19, reviewed_at 2024_04_11;)