alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Poweliks GET Request"; flow:established,to_server; urilen:4; http.method; content:"GET"; http.uri; content:"/dll"; fast_pattern; http.content_len; byte_test:0,=,0,0,string,dec; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Referer|0d 0a|"; reference:url,malware-traffic-analysis.net/2014/08/01/index3.html; classtype:trojan-activity; sid:2019138; rev:6; metadata:created_at 2014_09_08, malware_family Win32_Poweliks, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_22;)