Rule History

SID: 2068056 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Mar 6, 2026, 12:00 PM

Message:

ET MALWARE Observed DefendNot Domain (dnot .sh in TLS SNI)

Rule:

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed DefendNot Domain (dnot .sh in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".dnot.sh"; endswith; fast_pattern; reference:url,github.com/es3n1n/defendnot; classtype:trojan-activity; sid:2068056; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_03_06, deployment Perimeter, malware_family DefendNot, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_06;)

Created:

Mar 6, 2026, 12:00 PM

Updated:

Mar 6, 2026, 12:00 PM

DB Created:

Mar 6, 2026, 10:34 PM

DB Updated:

Mar 9, 2026, 8:34 PM

Filename:

rules/emerging-malware.rules