alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL SCAN cybercop os SFU12 probe"; flow:stateless; ack:0; flags:SFU12; content:"AAAAAAAAAAAAAAAA"; depth:16; reference:arachnids,150; classtype:attempted-recon; sid:2100627; rev:9; metadata:created_at 2010_09_23, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)