alert smtp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Phorpiex Template 6 Active - Outbound Malicious Email Spam"; flow:established,to_server; content:"Subject|3a 20|YOU|20|BETTER|20|READ|20|THIS|0d|"; fast_pattern; content:"COLLECTED|20|ALL|20|YOUR|20|FILES"; content:"in|20|Bitcoin"; nocase; content:"receiving|20|the|20|Bitcoin"; nocase; threshold:type limit, count 1, seconds 30, track by_src; classtype:command-and-control; sid:2031210; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2020_11_17, deployment Perimeter, deployment Internal, malware_family Phorpiex, performance_impact Low, confidence High, signature_severity Major, tag SpamBot, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_17;)