alert tcp any any -> any any (msg:"ET MALWARE [ANY.RUN] Hydrochasma Fast Reverse Proxy M1"; flow:established,to_server; dsize:3 ; stream_size:client,=,4; stream_size:server,=,1; content:"|10 61 62|"; depth:3; fast_pattern; reference:md5,8d4f9c64ba15f7cabd81936d1c8c83d4; reference:url,app.any.run/tasks/128bd923-3347-4a7f-8261-9a4c7cb29ea8; reference:url,community.emergingthreats.net/t/hydrochasma-fast-reverse-proxy/727; reference:url,symantec-enterprise-blogs.security.com/blogs/threat-intelligence/hydrochasma-asia-medical-shipping-intelligence-gathering; classtype:command-and-control; sid:2046726; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_07_05, deployment Perimeter, malware_family hydrochasma, performance_impact Significant, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_27;)