alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Linux/LuaBot CnC Beacon Response"; flow:established,from_server; file_data; content:"script|7c|"; within:7; content:"|7c|endscript"; distance:0; fast_pattern; content:"script|7c|"; distance:0; reference:url,blog.malwaremustdie.org/2016/09/mmd-0057-2016-new-elf-botnet-linuxluabot.html; classtype:command-and-control; sid:2023156; rev:2; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2016_09_06, deployment Perimeter, deployment Datacenter, malware_family Linux_LuaBot, confidence High, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)