alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [PTsecurity] Trickbot Data Exfiltration"; flow:established,to_server; http.method; content:"POST"; http.uri; pcre:"/\.[A-F0-9]{32}\//"; http.accept; content:"*/*"; http.user_agent; content:"Mozilla/4.0 (compatible|3b| MSIE 7.0|3b 20|Windows NT 6.1|3b|"; startswith; http.connection; content:"close"; startswith; nocase; http.host; pcre:"/^(?:(?:\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])/R"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:"|0d 0a|Accept|0d 0a|"; startswith; http.request_body; pcre:"/Content-Disposition\x3a\x20form-data\x3b\s*name=\x22(?:source|formdata|billinfo|cardinfo)\x22/m"; content:"=|22|billinfo|22|"; fast_pattern; classtype:trojan-activity; sid:2026738; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_12_19, deployment Perimeter, malware_family TrickBot, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)