ET MALWARE Possible LINE DANCER Backdoor Connection Attempt

Query · suricata

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;
target:dest_ip;
Raw source ET MALWARE Possible LINE DANCER Backdoor Connection Attempt · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
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;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.