alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE RegSubsDat Checkin"; flow:established,to_server; http.method; content:"POST"; nocase; http.uri; content:"0000/log"; fast_pattern; pcre:"/\/\d\d[A-F0-9]{4}0000\/log$/"; http.user_agent; content:"Mozilla/4.0"; bsize:11; reference:url,www.secureworks.com/research/threats/sindigoo/; classtype:command-and-control; sid:2014310; rev:7; metadata:created_at 2012_03_05, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_20;)