alert tcp $HOME_NET any -> $EXTERNAL_NET 21 (msg:"ET MALWARE MSIL/Golroted.B Keylogger FTP"; flow:established,to_server; content:"STOR Logger_"; reference:md5,b2b82fd662dd0ddf53aa37bb9025bf92; classtype:trojan-activity; sid:2020411; rev:1; metadata:created_at 2015_02_12, malware_family MSIL_Golroted_B, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)