alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Carberp CnC Reply no tasks"; flow:established,to_client; file.data; content:"no tasks"; startswith; classtype:command-and-control; sid:2011851; rev:9; metadata:created_at 2010_10_26, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_09;)