alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Likely Evil Request for uac.exe With Minimal Headers"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/uac.exe"; endswith; fast_pattern; http.header_names; content:!"Referer"; content:!"User-Agent"; content:"|0d 0a|Host|0d 0a|"; depth:10; isdataat:!20,relative; bsize:<31; reference:md5,fd66c2729efe28d54dbbdca62490b936; classtype:trojan-activity; sid:2032794; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_04_21, deployment Perimeter, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_21;)