alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Obitel Downloader Request"; flow:established,to_server; http.uri; content:".php?id="; pcre:"/\.php\?id=[0-9a-f]{8}$/"; http.user_agent; content:"ie"; bsize:2; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=TrojanDownloader%3aWin32%2fObitel.gen!A; reference:url,threatinfo.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=TROJ_AGENT.ASLV&VSect=T; classtype:trojan-activity; sid:2010244; rev:7; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_14;)