Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE x64/Generic Red Team Activity CnC Response"; flow:established,to_client; http.header_names; content:"|0d 0a|x-azure-ref|0d 0a|"; content:"|0d 0a|X-Cache|0d 0a|"; http.header; content:"|0d 0a|x-azure-ref|3a 20|20"; content:"er16cffdc5bnnsvlmnzkhcyecs00000002a000000002"; distance:0; fast_pattern; content:"|0d 0a|X-Cache|3a 20|CONFIG_NOCACHE|0d 0a|"; reference:md5,62bbc3b087c803260c0c63595cf872ee; classtype:trojan-activity; sid:2052811; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_05_21, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)