Rule History

SID: 2020966 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 7 • Apr 22, 2015, 12:00 PM

Message:

ET MALWARE CozyDuke APT Possible SSL Cert 1

Rule:

alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET MALWARE CozyDuke APT Possible SSL Cert 1"; flow:established,to_client; tls.cert_subject; content:"C=--"; startswith; content:"ST=SomeState"; tls.cert_serial; content:"31:d5"; depth:5; fast_pattern; reference:url,securelist.com/blog/69731/the-cozyduke-apt/; reference:md5,d5a82520ebf38a0c595367ff0ca89fae; classtype:targeted-activity; sid:2020966; rev:7; metadata:attack_target Client_Endpoint, created_at 2015_04_22, deployment Perimeter, deprecation_reason Relevance, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_01, reviewed_at 2024_03_28;)

Created:

Apr 22, 2015, 12:00 PM

Updated:

Apr 1, 2024, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-malware.rules