alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE WORM_VOBFUS Checkin Generic"; flow:established,to_server; urilen:5; http.method; content:"GET"; http.uri; content:"/1/?"; fast_pattern; depth:4; isdataat:!2,relative; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 5.1|3b 20|SV1)"; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; depth:22; reference:md5,f127ed76dc5e48f69a1070f314488ce2; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/watch-out-for-worm_vobfus/; reference:url,blog.dynamoo.com/2012/11/vobfus-sites-to-block.html; classtype:command-and-control; sid:2015976; rev:4; metadata:created_at 2012_12_04, signature_severity Major, updated_at 2020_08_18;)