Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible W32/Citadel Download From CnC Server Self Referenced /files/ attachment"; flow:established,to_client; http.header; content:" filename=|22|%2e/files/"; nocase; pcre:"/^[^\x22\x2f\r\n]+?\x22\r\n/R"; reference:url,malwaremustdie.blogspot.co.uk/2013/04/wireshark-analysis-of-citadel-trojan.html; reference:url,seifreed.es/docs/Citadel%20Trojan%20Report_eng.pdf; classtype:command-and-control; sid:2016742; rev:8; metadata:created_at 2013_04_09, deprecation_reason Age, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_22, reviewed_at 2024_04_22;)