alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE WORM_VOBFUS Requesting exe"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?"; offset:2; depth:11; pcre:"/^\/[a-z0-9]{1,10}\/?\?.+?$/i"; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 5.1|3b 20|SV1)"; fast_pattern; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; depth:20; reference:md5,f127ed76dc5e48f69a1070f314488ce2; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/watch-out-for-worm_vobfus/; classtype:trojan-activity; sid:2015969; rev:15; metadata:created_at 2012_11_30, signature_severity Major, updated_at 2020_08_17;)