alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TDSServ or Tidserv variant Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/crcmds/main"; nocase; reference:url,www.threatexpert.com/reports.aspx?find=%2Fcrcmds%2Fmain; classtype:command-and-control; sid:2008944; rev:6; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_18;)