Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED W32/Bifrose Second Stage Obfuscated Binary Download Claiming to Be JPEG"; flow:established,to_client; content:"Content-Type|3A 20|image/jpeg"; http_header; file_data; content:"|54 48 00 F7 20 10 72 6F 67 52|"; content:"|61 6E 6E 4F 1D A4 62 05 20 72 75 4E 49 ED 6E 40 44 4F 53|"; fast_pattern; within:50; classtype:trojan-activity; sid:2013796; rev:7; metadata:created_at 2011_10_24, signature_severity Unknown, updated_at 2019_07_26, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)