alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY exploitpack.com tool checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/changelog/"; fast_pattern; pcre:"/^\/changelog\/(?:appversion|changelog|help)$/"; http.user_agent; content:"Java/1"; startswith; http.header_names; content:!"Referer|0d 0a|"; reference:url,www.exploitpack.com; classtype:bad-unknown; sid:2020195; rev:4; metadata:created_at 2015_01_15, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_29;)