alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MegalodonHTTP CoinMiner Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?check="; fast_pattern; pcre:"/\.php\?check=\d$/"; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Referer|0d 0a|"; content:"|0d 0a|Host|0d 0a|"; startswith; reference:md5,966301e88d8a43abe1215413bfd48b09; reference:url,damballa.com/megalodonhttp-botnet-discovered-the-shark-paradox/; classtype:coin-mining; sid:2022128; rev:2; metadata:attack_target Client_Endpoint, created_at 2015_11_23, deployment Perimeter, confidence High, signature_severity Major, tag Coinminer, updated_at 2020_06_09, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1496, mitre_technique_name Resource_Hijacking;)