alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/TrojanDownloader.Agent.KUO CnC Activity M1"; flow:established,to_server; http.method; content:"PUT"; http.uri; content:"/tst/ins_cont.php"; startswith; bsize:17; fast_pattern; http.host; pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/W"; http.header_names; content:!"Referer"; http.user_agent; content:"Mozilla/4.0"; bsize:11; reference:md5,f6cb005907be5516394525da16d427c7; reference:url,seguranca-informatica.pt/brazilian-trojan-impacting-portuguese-users-and-using-the-same-capabilities-seen-in-other-latin-american-threats; classtype:trojan-activity; sid:2035459; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_15, deployment Perimeter, malware_family MSIL_TrojanDownloader_Agent_KUO, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_14;)