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Even MOAR Powershell, looking at Entra logins - the good, the bad and the password sprays, (Fri, Aug 21st)

0
Medium
News
Published: 08/21/2026 (08/21/2026, 01:49:18 UTC)
Source: SANS ISC Handlers Diary

Description

This report discusses the importance of monitoring Entra login logs in cloud environments, highlighting the detection of password spray attacks through PowerShell commands querying Microsoft Graph audit logs. It emphasizes reviewing both successful and failed login attempts, extracting geo-location and failure reasons to identify suspicious activities such as logins from unexpected countries or locked accounts due to repeated failed attempts. The analysis is based on practical PowerShell queries and encourages tightening conditional access policies based on findings.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/21/2026, 01:52:22 UTC

Technical Analysis

The content provides a practical approach to analyzing Microsoft Entra (Azure AD) login logs using PowerShell and Microsoft Graph API. It demonstrates how to extract and filter audit log sign-in data to identify failed login attempts, including password spray attacks, by examining failure reasons and geo-location information. It also shows how to detect successful logins from unexpected countries to spot potential unauthorized access. The report includes example commands for filtering and presenting this data, aiming to help administrators improve their conditional access policies and overall cloud security posture.

Potential Impact

The impact centers on the risk of unauthorized access through password spray attacks and potentially compromised accounts in cloud environments if login logs are not regularly monitored. Failure to analyze these logs can allow attackers to persist undetected, leading to account lockouts or breaches. By identifying suspicious login patterns, organizations can mitigate risks by adjusting conditional access policies and improving detection capabilities.

Defensive Guidance

This report does not describe a vulnerability requiring a patch but recommends proactive log monitoring and analysis using the provided PowerShell commands. Organizations should regularly review Entra login logs for failed and successful sign-ins, focusing on geo-location anomalies and failure reasons. Based on findings, tightening conditional access policies is advised to reduce the risk of unauthorized access. No specific patch or fix is applicable.

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Technical Details

Classification
{"confidence":0.3,"severitySource":"default","classifier":"rss-v2"}
Article Source
{"url":"https://isc.sans.edu/diary/rss/33268","fetched":true,"fetchedAt":"2026-08-21T01:52:17.322Z","wordCount":603}

Threat ID: 6a87af51acd9273b49719483

Added to database: 08/21/2026, 01:52:17 UTC

Last enriched: 08/21/2026, 01:52:22 UTC

Last updated: 08/21/2026, 01:54:17 UTC

Views: 4

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