alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Suspicious Windows NT version 3 User-Agent"; flow: established,to_server; content:"Windows NT 3"; nocase; http_user_agent; fast_pattern:only; classtype:trojan-activity; sid:2015900; rev:4; metadata:created_at 2012_11_19, updated_at 2012_11_19;)

Added 2017-08-07 21:09:31 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET INFO Suspicious Windows NT version 3 User-Agent"; flow: established,to_server; content:"Windows NT 3"; nocase; http_header; fast_pattern:only; pcre:"/^User-Agent\x3a[^\r\n]+Windows NT 3/Hmi"; classtype:trojan-activity; sid:2015900; rev:1;)

Added 2012-11-20 02:06:14 UTC