alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA453 ClumsyCover Maldoc Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/session/downexlog/cdfd/"; fast_pattern; startswith; http.header_names; content:!"Referer"; classtype:trojan-activity; sid:2034884; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_26, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_26;)