Versions (3)
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Rev: 4 • Oct 1, 2018, 12:00 PMET USER_AGENTS VPNFilter Related UA (curl53)
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS VPNFilter Related UA (curl53)"; flow:established,to_server; http.user_agent; content:"curl53"; depth:6; fast_pattern; endswith; reference:url,blog.talosintelligence.com/2018/09/vpnfilter-part-3.html; classtype:trojan-activity; sid:2026428; rev:4; metadata:affected_product Linux, attack_target Networking_Equipment, created_at 2018_10_01, deployment Perimeter, malware_family VPNFilter, confidence High, signature_severity Major, updated_at 2020_09_16;)
Oct 1, 2018, 12:00 PM
Sep 16, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-user_agents.rules