alert http $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WORM shell bot perl code download"; flow:established,to_client; file.data; content:"# ShellBOT"; nocase; classtype:trojan-activity; sid:2002683; rev:8; metadata:created_at 2010_07_30, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_11;)