alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gaboc Trojan Check-in"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:".asp"; content:"?type="; content:"&machinename="; reference:md5,6e871b9c440d5c77b9158ebcbe3fcd4b; classtype:trojan-activity; sid:2009519; rev:9; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2020_04_21;)