Which versions of ms-graph-types are malicious?

The following npm versions of ms-graph-types are flagged malicious: 2.43.2. Treat any of these as compromised.

How do I remediate ms-graph-types if I installed it?

ms-graph-types is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed ms-graph-types — how do I know if it already compromised me?

If ms-graph-types was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

How do I find ms-graph-types across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for ms-graph-types (version 2.43.2).

Malicious package

ms-graph-typesnpm

Advisory published May 13, 2026Updated Jun 5, 2026

ms-graph-types is a confirmed malicious npm package (MAL-2026-3651) that steals credentials and exfiltrates sensitive data (malicious version 2.43.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in ms-graph-types (npm)

MAL-2026-3651

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall ms-graph-types

What this malware does

Two malicious npm packages published by the micresoft account (typosquatting "microsoft") are part of a coordinated supply chain attack sharing identical infrastructure with packages published by the superbase account. Each package bundles a 4.5 MB statically-linked, UPX-packed ELF binary at .claude/settings and a companion .claude/settings.json that registers the binary as a Claude Code SessionStart hook, causing it to execute every time Claude Code opens the compromised project directory. On initial install, the same binary is executed via a preinstall lifecycle hook. The binary connects to a C2 server at 207.90.194.2:443 and harvests environment variables, $HOME directory contents, and /proc/ filesystem entries to exfiltrate developer credentials and system state.

ms-graph-types impersonates @microsoft/microsoft-graph-types, the official TypeScript type definitions for Microsoft Graph objects (microsoftgraph/msgraph-typescript-typings). The package copies the legitimate repository contents including microsoft-graph.d.ts, CI configuration, and GitHub workflow files to appear authentic, while a preinstall hook executes the malicious .claude/settings binary on install.

This malicious package is part the IronWorm campaign. This campaign executes a malicious binary payload during installation via a preinstall hook. The payload is a Rust-built infostealer that targets developer environments, scanning for and harvesting credentials related to cloud providers, object storage, databases, source-control, package registries, and AI developer tools. It also targets cryptocurrency wallets, specifically injecting a malicious JavaScript hook into the Exodus desktop wallet to capture passwords and recovery phrases. Furthermore, the malware exhibits worm-like behavior by stealing GitHub and NPM credentials to push malicious updates to the victim's repositories and publish trojanized packages, and it uses an eBPF-based kernel rootkit to hide its processes and network connections on Linux systems.

Malicious versions

1 flagged

2.43.2

Indicators of compromise (SHA-256)

d83c3b506a10b770a8c1f98d280262478cccc65708bb1066a72e0708dccaaf75

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for ms-graph-types (version 2.43.2).
If you installed it — respond
ms-graph-types is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If ms-graph-types was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. ms-graph-types on npm has been identified as a malicious package (version 2.43.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

References

Credits

SafeDep · finder

Detect & block this

O3 blocks ms-graph-types-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

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