Hunting MacSync Stealer infrastructure through behavioral pivots
MacSync Stealer rapidly rotates domains to evade detection, but its behavior remains consistent.
Microsoft Defender Experts
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Microsoft named a Leader in the 2026 IDC MarketScape for MDR/MXDR for the Enterprise
Microsoft is named a Leader in the 2026 IDC MarketScape for MDR services. -
ACR Stealer: Two observed intrusion chains amid increased threat activity
From late April 2026 to mid-June 2026, Microsoft Defender Experts observed increased ACR Stealer activity across customer environments. -
Turning threat intelligence into decisive action with Defender Experts
Security teams have never had more visibility, yet rarely have they felt more uncertain. Retain Microsoft Defender Experts
Microsoft Defender Experts are available to strengthen your teams with expertise when and where you need it. Learn how to elevate your security with expert-led services.
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Protecting Microsoft at AI speed: How SFI proactively hardens our cloud
At Microsoft we encompass these security requirements, along with threat knowledge, and operational frameworks in our Secure Future Initiative (SFI), to guide what a well-defended cloud service looks like. -
One intrusion, two cyberattackers: Uncovering parallel threat activity
Ransomware case reveals two parallel threat actors, blending tactics and evasion—showing why isolated signals can often miss modern, overlapping cyberattacks. -
Crypto Clipper uses Tor and worm-like propagation for persistence and control
Microsoft Threat Intelligence analyzed a cryptocurrency clipper campaign that combines clipboard theft, wallet replacement, Tor-based communications, and worm-like propagation. -
ClickFix campaign uses fake macOS utilities lures to deliver infostealers
Threat actors are targeting macOS users with fake utility fixes that trick them into running malicious Terminal commands. Modernize your Security Operations Center with Microsoft Sentinel
Microsoft Sentinel is a cloud-native SIEM solution powered by AI and automation that delivers intelligent security analytics across your entire enterprise.
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Cross‑tenant helpdesk impersonation to data exfiltration: A human-operated intrusion playbook
Threat actors are abusing external Microsoft Teams collaboration to impersonate IT helpdesk staff and convince users to grant remote access. -
Incident response for AI: Same fire, different fuel
AI changes how incidents unfold and how we respond. -
Intent redirection vulnerability in third-party SDK exposed millions of Android wallets to potential risk
A severe Android intent‑redirection vulnerability in a widely deployed SDK exposed sensitive user data across millions of apps. -
Inside an AI‑enabled device code phishing campaign
A new wave of device code phishing shows how threat actors are scaling account compromise using AI and end‑to‑end automation.
