Best ITDR Solutions

Identity Threat Detection and Response (ITDR) is a security discipline focused on detecting and responding to attacks targeting identity infrastructure — authentication systems, directory services, identity providers, and privileged access management. ITDR addresses the gap between traditional IAM (which manages identity configurations) and SOC detection operations (which detect attacks using identities).

Attackers have adapted to the modern perimeter-less enterprise: network perimeters are porous, endpoints have EDR, but stolen credentials remain highly effective. Identity is the control plane for cloud, SaaS, and remote access. Once an attacker has valid credentials, they can move through the environment without triggering traditional network or endpoint detections.

Top identity threats: (1) AiTM (Adversary-in-the-Middle) phishing — stealing session cookies to bypass MFA; (2) MFA fatigue attacks — overwhelming users with MFA push notifications; (3) Password spraying — low-volume attempts across many accounts; (4) Golden Ticket — forged Kerberos tickets for persistent AD access; (5) Pass-the-Hash / Pass-the-Ticket — credential relay attacks; (6) OAuth consent abuse — malicious app gaining persistent access.

IAM (Identity and Access Management) manages who has access to what — provisioning, deprovisioning, access reviews. PAM (Privileged Access Management) specifically manages and monitors privileged accounts. ITDR is detection-focused: it monitors identity systems in real time for signs of attack or compromise. IAM/PAM prevent unauthorized access; ITDR detects when authorised credentials are being abused.

MFA prevents many attacks but is not sufficient on its own. AiTM phishing bypasses MFA by stealing the authenticated session cookie. MFA fatigue attacks manipulate users into approving fraudulent MFA requests. Pass-the-hash attacks reuse harvested credential hashes. ITDR detects these post-MFA-bypass attack patterns that MFA alone cannot prevent.

A Golden Ticket attack creates a forged Kerberos ticket using the KRBTGT account's password hash, granting attackers persistent, long-lasting authentication tickets for any service in the Active Directory domain. Detection requires monitoring for anomalous Kerberos ticket lifetimes, ticket requests without corresponding TGT events, and logins from non-domain-joined systems.

ITDR alerts should flow into the SOC's primary investigation platform (SIEM or AI SOC platform) for correlation with endpoint, network, and cloud events. A standalone ITDR alert for a suspicious login is enriched when correlated with the user's endpoint process events, email security events, and cloud access patterns. Cross-telemetry correlation reduces false positives and builds complete attack chains.

Non-human identities include service accounts, API keys, OAuth tokens, and machine identities (AWS IAM roles, Kubernetes service accounts). They outnumber human identities in modern environments by 10–100x and are frequently over-privileged and poorly monitored. ITDR platforms that include non-human identity monitoring catch attacks using compromised service credentials that human-identity-only tools miss.

Prioritise based on your threat model and environment: (1) Entra ID / Okta attacks if you're cloud-first; (2) Active Directory attacks if you have large on-premises infrastructure; (3) SaaS identity attacks if your sensitive data is in SaaS applications; (4) MFA bypass attacks universally, as they're the most common initial foothold for cloud attacks. Build detections in order of likely attacker use against your environment.

Key ITDR response actions: (1) Terminate active sessions — revoke all active sessions for a compromised account immediately; (2) Disable account — suspend the account pending investigation; (3) Require MFA re-enrolment — useful when MFA token is suspected stolen; (4) Reset credentials — force password change and invalidate all Kerberos tickets; (5) Quarantine device — isolate the device associated with suspicious authentication. Response actions should require human approval for production accounts.