alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE NoBo Downloader Dropper GET"; flow:established,to_server; http.method; content:"GET"; nocase; http.user_agent; content:"NoBo"; startswith; fast_pattern; reference:url,www.spynomore.com/trojan-nobo-v1-3.htm; classtype:trojan-activity; sid:2009443; rev:6; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_13;)