alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Infostealer.Jackpos Checkin"; flow:to_server,established; http.method; content:"POST"; nocase; http.user_agent; content:"something"; depth:9; http.request_body; content:"mac="; fast_pattern; depth:4; content:"&t1="; content:"&t2="; pcre:"/^mac=(?:[A-F0-9]{2}-){5}[A-F0-9]{2}&t1=/"; reference:md5,aa9686c3161242ba61b779aa325e9d24; reference:md5,88e721f62470f8bd267810fbaa29104f; reference:url,intelcrawler.com/about/press10; classtype:command-and-control; sid:2018108; rev:4; metadata:created_at 2014_02_12, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_27;)