alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Infostealer.Jackpos Checkin 2"; flow:to_server,established; http.uri; content:"/post/echo"; fast_pattern; bsize:10; http.header_names; content:!"User-Agent|0d 0a|"; reference:md5,aa9686c3161242ba61b779aa325e9d24; reference:md5,88e721f62470f8bd267810fbaa29104f; reference:url,intelcrawler.com/about/press10; classtype:command-and-control; sid:2018128; rev:4; metadata:created_at 2014_02_13, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_22;)