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New BlobPhish Attack Leverages Browser Blob Objects to Steal Users’ Login Credentials

📅 28 April 2026 at 17:40 UTC📰 Cyber Security NewsView original source ↗
New BlobPhish Attack Leverages Browser Blob Objects to Steal Users’ Login Credentials

A sophisticated, memory-resident phishing campaign called BlobPhish, active since October 2024, that exploits browser Blob URL APIs to silently steal credentials from Microsoft 365 users, major U.S. banks, and financial platforms while remaining almost completely invisible to traditional security tools. BlobPhish is a sustained credential-phishing operation that fundamentally changes how phishing pages are delivered to […] The post New BlobPhish Attack Leverages Browser Blob Objects to Steal Users’ Login Credentials appeared first on Cyber Security News.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

BlobPhish is a sophisticated phishing campaign that exploits browser Blob URL APIs to steal login credentials from Microsoft 365 users, major U.S. banks, and financial platforms, making it difficult for traditional security tools to detect.

⚙️Technical Details
Affected Systems
Microsoft 365major U.S. banksfinancial platforms
Attack Vectors
browser Blob URL APIs
💥Impact Assessment
Severity: critical
Who Is at Risk
Microsoft 365 usersmajor U.S. banksfinancial platformsSeverity: critical
🛡️Recommended Actions
1Implement browser-specific security patches
2Monitor login activity for suspicious patterns
3Use advanced threat detection tools to identify and block BlobPhish attacks
📦Affected Products
Microsoft 365

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