alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible LINE DANCER Backdoor Connection Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/CSCOSSLC/config-auth"; fast_pattern; bsize:21; http.request_body; content:"|3c|host-scan-reply|3e|"; pcre:"/^[a-zA-Z0-9+/=]{10}/R"; content:"|3c 2f|host-scan-reply|3e|"; distance:0; reference:url,www.cyber.gc.ca/en/news-events/cyber-activity-impacting-cisco-asa-vpns; classtype:trojan-activity; sid:2052271; rev:1; metadata:affected_product Cisco_ASA, attack_target Networking_Equipment, tls_state TLSDecrypt, created_at 2024_04_25, deployment Perimeter, deployment SSLDecrypt, malware_family LINE_DANCER, performance_impact Low, confidence Low, signature_severity Major, updated_at 2024_04_25; target:dest_ip;)