Anthropic Organization IP Restriction Deleted

Last updated 4 days ago on 2026-09-21

Created 13 days ago on 2026-09-12

About

Organization IP restrictions limit Anthropic administrative access to approved network ranges. Deleting one widens where a compromised admin session or API key can be used. The audit event does not always carry the deleted CIDR or restriction identifier, so treat this as an early signal and pivot to nearby IP restriction create or update events for the same organization.

Tags

Domain: GenAIPlatform: AnthropicData Source: Anthropic Audit LogsUse Case: Identity and Access AuditUse Case: Threat DetectionRule Type: ES|QLTactic: Defense EvasionLanguage: esql

Severity

high

Risk Score

MITRE ATT&CK™

Defense Evasion (TA0005)(external, opens in a new tab or window)

↳ Impair Defenses (T1562)(external, opens in a new tab or window)

False Positive Examples

Network or security teams remove IP restrictions during office moves, VPN migrations, or policy redesigns. Validate the actor, and confirm replacement restrictions were applied if the control is still required.

License

Elastic License v2(external, opens in a new tab or window)

Definition

Integration Pack: Prebuilt Security Detection Rules
Related Integrations: anthropic(external, opens in a new tab or window)
Query

✄𐘗text code block:
✄𐘗from logs-anthropic.audit-* metadata _id, _version, _index
| where
    data_stream.dataset == "anthropic.audit" and
    mv_contains(event.category, "configuration") and
    event.action == "org_ip_restriction_deleted"
| keep _id, _version, _index, @timestamp, event.*, organization.*, user.*, source.*, user_agent.*, anthropic.audit.*, data_stream.*

Install detection rules in Elastic Security

Detect Anthropic Organization IP Restriction Deleted in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).