Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed LoJax Domain (webstp .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".webstp.com"; endswith; fast_pattern; reference:url,web-assets.esetstatic.com/wls/2018/09/ESET-LoJax.pdf; classtype:trojan-activity; sid:2068105; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_03_10, deployment Perimeter, malware_family LoJax, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_10;)