alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ReverseRAT Activity (POST) M4"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/h_tt_p"; fast_pattern; bsize:7; http.header_names; content:!"User-Agent"; content:!"Referer"; content:!"Accept"; reference:md5,14a2b8af48b6db92f047525d893eaeb8; reference:url,blog.lumen.com/suspected-pakistani-actor-compromises-indian-power-company-with-new-reverserat/; classtype:trojan-activity; sid:2033172; rev:3; metadata:attack_target Client_Endpoint, created_at 2021_06_24, deployment Perimeter, malware_family ReverseRAT, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_16;)