alert http $HOME_NET any -> $EXTERNAL_NET 8998 (msg:"ET MALWARE Maldoc Retrieving Payload 2022-06-15"; flow:established,to_server; urilen:12; http.method; content:"GET"; http.uri; bsize:12; content:"/update.html"; fast_pattern; http.host; pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/"; reference:url,cert.gov.ua/article/160530; classtype:trojan-activity; sid:2037000; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_15, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_16, reviewed_at 2023_10_16;)