Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed DeltaStealer Domain (deltaproject .us) in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".deltaproject.us"; endswith; fast_pattern; reference:url,www.trendmicro.com/content/dam/trendmicro/global/en/research/23/e/rust-based-info-stealers-abuse-github-codespaces/IOC-list-rust-based-info-stealers-abuse-github-codespaces.txt; classtype:domain-c2; sid:2045787; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_19, deployment Perimeter, malware_family DeltaStealer, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_05_19, reviewed_at 2025_07_14;)