Research explained

Microsoft assessed likely AI assistance in an SVG phishing campaign

The observed attack used compromised email accounts and disguised SVG attachments; AI involvement remained an assessment.

Published 29 Oct 2026 · Material update 29 Sep 2025 — last time the underlying evidence changed · Evidence: medium

What happened

September 2025 reporting described Microsoft’s investigation of phishing messages sent from a compromised business email account. SVG attachments concealed behavior that redirected recipients toward credential-stealing pages.

Microsoft assessed that language-model assistance likely contributed to the obfuscated code. That assessment should not be presented as definitive proof of which model was used or as a vulnerability in Microsoft’s AI products.

Defenders should focus on the observable chain: suspicious sender behavior, unexpected SVG attachments, redirects and fake sign-in pages. Investigate compromised accounts and use phishing-resistant authentication where available.

Read the original source.

Next step

Review unexpected SVG attachments and investigate signs of business-email compromise.

What remains unknown

Open question
The sources reviewed do not establish whether your deployment was exploited.

Source references