alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO RealThinClient Session Init"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"?ACTION=HELLO"; distance:0; fast_pattern; http.host; content:!"nanosystems.it"; http.header_names; content:!"User-Agent"; content:!"Referer"; content:!"Accept-"; reference:url,www.fireeye.com/blog/threat-research/2015/12/latentbot_trace_me.html; reference:md5,7553a383bbdee93624e8208dad686c5a; reference:url,rtc.teppi.net; classtype:bad-unknown; sid:2036705; rev:11; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_08_17, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_08_27;)