Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Havoc Framework CnC Response"; flow:established,to_client; http.header_names; content:"X-IsHavocFramework|0d 0a|"; fast_pattern; http.content_type; content:"text/plain"; reference:url,github.com/HavocFramework/Havoc/blob/main/Teamserver/profiles/havoc.yaotl; classtype:trojan-activity; sid:2039074; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_30, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_30, reviewed_at 2025_10_24;)