alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE PunkeyPOS HTTP CnC Beacon Fake UA"; flow:established,to_server; http.user_agent; bsize:19; content:"Mozilla Firefox/4.0"; fast_pattern; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:url,trustwave.com/Resources/SpiderLabs-Blog/New-POS-Malware-Emerges---Punkey/; reference:md5,43c277dd56f9c6de4b8dc249e12039df; classtype:command-and-control; sid:2020934; rev:5; metadata:attack_target Client_Endpoint, created_at 2015_04_17, deployment Perimeter, signature_severity Major, tag c2, updated_at 2024_03_10, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)