alert tcp $HOME_NET !21:23 -> $EXTERNAL_NET any (msg:"GPL EXPLOIT Microsoft cmd.exe banner"; flow:established; content:"Microsoft Windows "; content:"Copyright |28|c|29| 20"; distance:0; content:"Microsoft Corp"; distance:0; reference:nessus,11633; classtype:successful-admin; sid:2102123; rev:7; metadata:created_at 2010_09_23, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)