alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Zemra.DDoS.Bot Variant CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/telnet_cmd.php"; fast_pattern; http.user_agent; content:"Opera/9.61"; http.request_body; content:"a="; depth:2; content:"&b="; distance:0; content:"&c="; distance:0; reference:url,thegoldenmessenger.blogspot.de/2012/09/2-disclosure-of-interesting-botnet-part-1.html; reference:url,thegoldenmessenger.blogspot.de/2012/09/2-disclosure-of-interesting-botnet-part-2.html; classtype:command-and-control; sid:2016205; rev:4; metadata:attack_target Client_Endpoint, created_at 2013_01_15, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_04_23, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)