alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [eSentire] VBS Retrieving Malicious Payload"; flow:established,to_server; http.method; content:"HEAD"; http.uri; content:".php1"; endswith; fast_pattern; pcre:"/\/[0-9]{10}.php1$/"; http.user_agent; content:"Microsoft BITS/"; http.header_names; content:!"Referer|0d 0a|"; reference:md5,aa56a1de9b91446c66d53f12f797bef5; classtype:trojan-activity; sid:2025626; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_06_25, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16;)