alert http $HOME_NET any -> $EXTERNAL_NET 8998 (msg:"ET MALWARE Maldoc Retrieving Payload 2022-06-15"; flow:established,to_server; content:"GET /i HTTP 1.1|0d 0a|"; fast_pattern; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; reference:url,cert.gov.ua/article/160530; classtype:trojan-activity; sid:2037001; rev:2; 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 2022_07_27;)