Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/TrojanDownloader.Agent.KUO CnC Activity M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/dwn.php"; endswith; fast_pattern; http.host; pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/W"; http.header; content:"DNT: 1"; http.header_names; content:!"Referer"; content:"|0d 0a|Host|0d 0a|DNT|0d 0a|Connection|0d 0a 0d 0a|"; http.user_agent; content:"Mozilla/5.0 (Windows NT 6.1|3b 20|Trident/7.0|3b 20|rv:11.0) like Gecko"; bsize:61; 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:2035460; 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, deprecation_reason Age, malware_family MSIL_TrojanDownloader_Agent_KUO, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_12_02, reviewed_at 2024_12_02;)