alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Likely TDSS Download (pcdef.exe)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/pcdef.exe"; fast_pattern; nocase; classtype:trojan-activity; sid:2010055; rev:6; metadata:created_at 2010_07_30, confidence Medium, signature_severity Major, updated_at 2024_03_18;)