alert ftp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TSPY_POCARDL.U Possible FTP Login"; flow:established,to_server; content:"USER user drupalzf"; reference:md5,ceb5b99c13b107cf07331bcbddb43b1f; reference:url,trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-pos-ram-scraper-malware.pdf; classtype:trojan-activity; sid:2019159; rev:2; metadata:created_at 2014_09_11, confidence Medium, signature_severity Major, updated_at 2019_07_26;)