alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Possible BSNL Router DNS Change Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/dnscfg.cgi"; fast_pattern; http.request_body; content:"dnsPrimary="; content:"&dnsSecondary="; content:"&dnsDynamic="; content:"&dnsRefresh="; reference:url,www.hackersbay.in/2011/02/pwning-routersbsnl.html; classtype:attempted-user; sid:2013918; rev:4; metadata:created_at 2011_11_18, confidence Medium, signature_severity Major, updated_at 2024_03_05;)