alert http any any -> $HOME_NET any (
msg:"ET WEB_SPECIFIC_APPS Linksys E-Series OS Command Injection (CVE-2025-34037) M1";
flow:established,to_server;
http.uri;
content:"/tmUnblock.cgi"; fast_pattern;
http.request_body;
content:"ttcp_ip|3d|";
pcre:"/^[^&]*?(?:[\x3b\x24\x26\x60\x7c]|\x25(?:3[bB]|2[46]|60|7[cC]))/R";
http.method;
content:"POST";
reference:url,www.bitsight.com/blog/rondodox-botnet-infrastructure-analysis;
reference:cve,2025-34037;
classtype:web-application-attack;
sid:2068292; rev:1;
metadata:affected_product Linksys, attack_target Server, tls_state TLSDecrypt, created_at 2026_03_17, cve CVE_2025_34037, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_03_17, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)