ACR Stealer campaigns use ClickFix lures, JPEG steganography, and WebDAV to steal browser tokens, passwords, PDFs, and synced ...

New Helix extortion group steals SharePoint data after compromising Microsoft 365 accounts through voice phishing and MFA ...

Microsoft has observed a surge in attacks using the ACR Stealer malware to steal browser-stored passwords, authentication ...

From late April 2026 to mid-June 2026, Microsoft Defender Experts observed increased ACR Stealer activity across customer ...