alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE P2P Zeus Response From CnC"; flow:established,from_server; content:"|E5 AA C0 31|"; depth:4; content:"|5B 74|"; distance:5; within:2; content:"|C1|"; distance:4; within:2; reference:url,www.abuse.ch/?p=3499; classtype:command-and-control; sid:2013912; rev:4; metadata:created_at 2011_11_11, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)