It indicates that the domain’s SSL/TLS certificate supports OCSP stapling, a mechanism that allows the server to provide proof of its certificate’s validity directly during the TLS handshake. This reduces reliance on external OCSP responders and improves both security and performance.
Three questions every analyst asks before acting on this signal.
It indicates that the domain’s SSL/TLS certificate supports OCSP stapling, a mechanism that allows the server to provide proof of its certificate’s validity directly during the TLS handshake. This reduces reliance on external OCSP responders and improves both security and performance.
OCSP (Online Certificate Status Protocol) is a protocol used to check whether an SSL/TLS certificate has been revoked by the issuing Certificate Authority (CA). OCSP stapling enhances this process by embedding the revocation status directly into the TLS response, preventing man-in-the-middle manipulation and improving validation speed.
Domains using OCSP stapling are typically better maintained and more transparent in their certificate management. Malicious infrastructures rarely enable OCSP stapling, as they often rely on self-signed or free certificates that skip revocation checking entirely.
A realistic shape of the entry the engine appends to the risk_signals array when this signal fires. Evidence keys are subgroup-default; per-signal overrides documented in the API reference.
{
"slug": "ocsp_ssl",
"name": "OCSP-Stapled SSL Certificate Detected",
"group": "http_crawling_history",
"subgroup": "ssl_behavior",
"direction": "safe",
"evidence": {
"cert_issued_days_ago": 9,
"issuer": "letsencrypt",
"valid_for_days": 90,
"rotation_count_90d": 3,
"cert_type": "DV"
}
}15 other signals share the same subgroup. They detect related behaviors and often co-fire on the same IOC.
It means that the SSL/TLS certificate presented by the domain failed critical validation checks. This can occur due to m…
It means the SSL/TLS certificate’s Common Name (CN) or Subject Alternative Name (SAN) does not match the accessed domain…
It means the SSL/TLS certificate of the domain includes verified organizational details that have been authenticated by …
It means the domain is using an SSL/TLS certificate that was generated and signed by the same entity, without verificati…
The Verdict Gallery is a curated stream of real verdicts. Filter by this signal to see exactly which IOCs it caught, what other signals fired alongside it, and what the engine recommended.
100 IOCs/day on the free tier, LLM layer included. No card required.