alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Win32.Sality.bh Checkin"; flow:to_server,established; content:"/logo.gif?"; http_uri; content:"Mozilla/4.0 (compatible|3b| MSIE 7.0|3b| Windows NT 5.1|3b| .NET CLR 1.1.4322|3b| .NET CLR 2.0.50728)|0d 0a|Host|3a| "; http_header; pcre:"/\x2flogo\x2egif\x3f([0-9a-z]){5}\x3d\d{6,7}/U"; content:!"Accept"; http_header; content:!"Connection|3a|"; http_header; reference:md5,c15f4fe2e180150dc511aa64427404c5; classtype:trojan-activity; sid:2018111; rev:3; metadata:created_at 2012_04_09, signature_severity Unknown, updated_at 2019_07_26;)