Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Venom Spider/TA4557 Domain (contactlistsagregator .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".contactlistsagregator.com"; endswith; fast_pattern; reference:url,arcticwolf.com/resources/blog/venom-spider-uses-server-side-polymorphism-to-weave-a-web-around-victims/; classtype:trojan-activity; sid:2062355; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_05_14, deployment Perimeter, confidence High, signature_severity Major, tag TA4557, tag VenomSpider, tag AI_Generated_Description, updated_at 2025_05_14;)