alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Vawtrak/NeverQuest Server Response"; flow:established,to_client; flowbits:isset,ET.Vawtrak; file.data; content:"ok"; startswith; fast_pattern; byte_test:1,<,0x1b,0,relative; content:"|00|"; distance:1; within:1; classtype:trojan-activity; sid:2019499; rev:9; metadata:created_at 2014_10_24, signature_severity Major, updated_at 2024_04_14;)