alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JS/TrojanDownloader.Agent.TXV CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/postUP.php"; endswith; fast_pattern; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 6.0)"; http.connection; content:"keep-alive"; http.content_type; content:"application/x-www-form-urlencoded"; startswith; http.header_names; content:!"Referer"; reference:url,twitter.com/Unit42_Intel/status/1496172957726560257; classtype:trojan-activity; sid:2035271; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_02_22, deployment Perimeter, malware_family JS_TrojanDownloader_Agent_TXV, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_22, reviewed_at 2024_06_26;)