alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ReverseRat 3.0 CnC Checkin M2"; flow:established,to_server; http.method; content:"POST"; http.uri; content:!"."; content:!"&"; content:!"="; http.request_body; content:"|62 84 d0 8f d1 b4 16 6c 0b 36|"; startswith; fast_pattern; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|User-Agent|0d 0a|"; reference:md5,bd063ea38bb4bd7218e517d0a5cc8889; reference:url,threatmon.io/apt-sidecopy-targeting-indian-government-entities/; reference:url,twitter.com/souiten/status/1620629752863404032; classtype:trojan-activity; sid:2044380; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_28, deployment Perimeter, malware_family ReverseRAT, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_28; target:src_ip;)