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Fake LastPass Authenticator Installer Abuses Microsoft-Signed Driver to Kill Antivirus and EDR

thehackernews.com 2026-09-21 AI supply chain Critical

What Happened

A fake LastPass Authenticator installer offered on GitHub installs a Windows kernel driver that shuts off antivirus and other security software before a password stealer runs if a victim downloads and runs it, researchers at LastPass and Delphos Labs said on September 17. Microsoft's own hardware-compatibility program signs the driver, scored zero detections on VirusTotal when researchers

Why It Matters

The report describes a fake LastPass Authenticator installer that uses a Microsoft-signed Windows kernel driver to disable antivirus and endpoint detection tools before deploying a password stealer. It does not report an AI system, AI model, or AI-enabled service being targeted. RealGround analysis: the incident is relevant only indirectly because it demonstrates software-supply-chain and code-signing risks that can affect organizations deploying or operating AI infrastructure; an AI supply-chain assessment can help identify analogous dependencies, signing controls, and endpoint protections.

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RealGround Analysis

This signal maps to AI supply chain. Organizations using AI agents, LLM APIs, SaaS integrations, or sensitive data workflows should review whether this class of issue could create unauthorized tool execution, data leakage, weak approval gates, or unmanaged supply-chain exposure.

Recommended Actions

  • Restrict AI agent tool permissions and production write paths.
  • Review sensitive data access across prompts, logs, embeddings, memory, and SaaS integrations.
  • Add human approval workflows for high-impact or state-changing actions.
  • Run prompt injection and indirect prompt injection tests against affected workflows.
  • Document the owner, control gap, and remediation deadline for this risk class.

Source

https://thehackernews.com/2026/09/fake-lastpass-authenticator-installer.html

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