alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/InfoTester Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.content_type; content:"application/x-www-form-urlencoded"; bsize:33; http.request_body; content:"JTU3JTY5JTZFJTY0JTZGJTc3JTczJTNBJTIw"; startswith; fast_pattern; pcre:"/(?:JTBEJTBBJTBEJTBBJTREJTY1JTZEJTZGJTcyJTc5JTNBJTIw|UwRCUwQSUwRCUwQSU0RCU2NSU2RCU2RiU3MiU3OSUzQSUyM|lMEQlMEElMEQlMEElNEQlNjUlNkQlNkYlNzIlNzklM0ElMj)/R"; reference:md5,1d081e356b0593df10bcb12de2931ffa; classtype:command-and-control; sid:2034543; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_11_24, deployment Perimeter, malware_family Win32_InfoTester, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_24;)