Rule History

SID: 2036247 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 2 • Apr 18, 2022, 12:00 PM

Message:

ET MALWARE Observed Blackguard_v3.5 Domain (ritmflow .online) in TLS SNI

Rule:

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Blackguard_v3.5 Domain (ritmflow .online) in TLS SNI"; flow:established,to_server; tls.sni; content:"ritmflow.online"; bsize:15; fast_pattern; reference:md5,dce3c6ed046018eac08f82942401123d; reference:url,twitter.com/3xp0rtblog/status/1516092338065612804; classtype:trojan-activity; sid:2036247; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_04_18, deployment Perimeter, deprecation_reason Relevance, malware_family Blackguard_Stealer, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_05_10;)

Created:

Apr 18, 2022, 12:00 PM

Updated:

May 10, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-malware.rules