diff --git a/x-pack/plugins/security_solution/public/common/mock/mock_detection_alerts.ts b/x-pack/plugins/security_solution/public/common/mock/mock_detection_alerts.ts
index 7f52db599135ad..3b8a07b7ffeb72 100644
--- a/x-pack/plugins/security_solution/public/common/mock/mock_detection_alerts.ts
+++ b/x-pack/plugins/security_solution/public/common/mock/mock_detection_alerts.ts
@@ -10,7 +10,7 @@ import type { EcsSecurityExtension as Ecs } from '@kbn/securitysolution-ecs';
 export const getDetectionAlertMock = (overrides: Partial<Ecs> = {}): Ecs => ({
   ...{
     _id: '1',
-    timestamp: '2018-11-05T19:03:25.937Z',
+    '@timestamp': '2018-11-05T19:03:25.937Z',
     host: {
       name: ['apache'],
       ip: ['192.168.0.1'],
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_table/actions.test.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_table/actions.test.tsx
index 5ad96cfc322d6a..c56edd19100b31 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_table/actions.test.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_table/actions.test.tsx
@@ -1014,9 +1014,9 @@ describe('alert actions', () => {
       });
 
       test('it uses ecs.Data.timestamp if one is provided', () => {
-        const ecsDataMock: Ecs = {
+        const ecsDataMock = {
           ...mockEcsDataWithAlert,
-          timestamp: '2020-03-20T17:59:46.349Z',
+          '@timestamp': '2020-03-20T17:59:46.349Z',
         };
         const result = determineToAndFrom({ ecs: ecsDataMock });
 
@@ -1025,7 +1025,8 @@ describe('alert actions', () => {
       });
 
       test('it uses current time timestamp if ecsData.timestamp is not provided', () => {
-        const { timestamp, ...ecsDataMock } = mockEcsDataWithAlert;
+        // @ts-ignore // TODO remove when EcsSecurityExtension has been cleaned https://github.com/elastic/kibana/issues/156879
+        const { '@timestamp': timestamp, ...ecsDataMock } = mockEcsDataWithAlert;
         const result = determineToAndFrom({ ecs: ecsDataMock });
 
         expect(result.from).toEqual('2020-03-01T17:54:46.349Z');
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_table/actions.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_table/actions.tsx
index 194e986ff68c2b..33174b9b2266bf 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_table/actions.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_table/actions.tsx
@@ -27,6 +27,7 @@ import {
   ALERT_SUPPRESSION_END,
   ALERT_SUPPRESSION_DOCS_COUNT,
   ALERT_SUPPRESSION_TERMS,
+  TIMESTAMP,
 } from '@kbn/rule-data-utils';
 
 import { lastValueFrom } from 'rxjs';
@@ -155,10 +156,13 @@ export const determineToAndFrom = ({ ecs }: { ecs: Ecs[] | Ecs }) => {
   const elapsedTimeRule = moment.duration(
     moment().diff(dateMath.parse(ruleFrom != null ? ruleFrom[0] : 'now-1d'))
   );
-  const from = moment(ecsData.timestamp ?? new Date())
-    .subtract(elapsedTimeRule)
-    .toISOString();
-  const to = moment(ecsData.timestamp ?? new Date()).toISOString();
+
+  const alertTimestampEcsValue = getField(ecsData, TIMESTAMP);
+  const alertTimestamp = Array.isArray(alertTimestampEcsValue)
+    ? alertTimestampEcsValue[0]
+    : alertTimestampEcsValue;
+  const to = moment(alertTimestamp ?? new Date()).toISOString();
+  const from = moment(to).subtract(elapsedTimeRule).toISOString();
 
   return { to, from };
 };