Rule History

SID: 2061586 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 2 • Mar 25, 2025, 12:00 PM

Message:

ET PHISHING Observed TA450 Domain in TLS SNI

Rule:

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Observed TA450 Domain in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".microsoftonlines.com"; endswith; fast_pattern; classtype:trojan-activity; sid:2061586; rev:2; metadata:attack_target Client_Endpoint, created_at 2025_03_25, deployment Perimeter, former_category MALWARE, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag TA450, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_16, former_sid 2860885;)

Created:

Mar 25, 2025, 12:00 PM

Updated:

Apr 16, 2025, 12:00 PM

DB Created:

Apr 15, 2025, 9:34 PM

DB Updated:

Jul 2, 2025, 9:34 PM

Filename:

rules/emerging-phishing.rules