What does the ethers-web malware do?

The OpenSSF Package Analysis project identified 'ethers-web' @ 1.0.0 (npm) as malicious. It is considered malicious because: - The package communicates with a domain associated with malicious activity. - The package executes one or more commands associated with malicious behavior.

Which versions of ethers-web are malicious?

The following npm versions of ethers-web are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate ethers-web if I installed it?

Remove ethers-web from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed ethers-web — how do I know if it already compromised me?

If ethers-web 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 ethers-web across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for ethers-web (version 1.0.0).

Malicious package

ethers-webnpm

Advisory published May 13, 2026Updated May 13, 2026

ethers-web is a confirmed malicious npm package (MAL-2026-3711) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in ethers-web (npm)

MAL-2026-3711

Immediate action

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

npm uninstall ethers-web

What this malware does

The OpenSSF Package Analysis project identified 'ethers-web' @ 1.0.0 (npm) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.
The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

7b57e9cfd1db5527382181f22fbf36f8bbc8cc0df4f701d2b4d6bc7ec7dbc407

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for ethers-web (version 1.0.0).
If you installed it — respond
Remove ethers-web from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If ethers-web 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. ethers-web on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks ethers-web-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database