Rule History

SID: 2018364 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 3 • Apr 5, 2014, 12:00 PM

Message:

ET HUNTING SUSPICIOUS OVH Shared Host SSL Certificate (Observed In Use by Some Trojans)

Rule:

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING SUSPICIOUS OVH Shared Host SSL Certificate (Observed In Use by Some Trojans)"; flow:established,to_client; tls.cert_subject; content:"CN=ssl"; content:".ovh.net"; within:10; fast_pattern; pcre:"/CN=ssl\d{1,2}.ovh.net(?:$|,)/"; reference:url,help.ovh.co.uk/SslOnHosting; reference:md5,63079a2471fc18323f355ec28f36303c; reference:md5,20b1c30ef1f5dae656529b277e5b73fb; classtype:bad-unknown; sid:2018364; rev:3; metadata:attack_target Client_Endpoint, created_at 2014_04_05, deployment Perimeter, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2022_03_16;)

Created:

Apr 5, 2014, 12:00 PM

Updated:

Mar 16, 2022, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-hunting.rules