@equansservices/setupnpm
Advisory published Updated
@equansservices/setup is a confirmed malicious npm package (MAL-2026-10094) that typosquats a legitimate package to trick installs (malicious versions 1.0.0, 1.0.1, 1.0.2…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in @equansservices/setup (npm)
What this malware does
package.json declares a postinstall hook (node setup.js) that fires automatically on npm install. setup.js selects a platform-specific target and fetches an archive over plain HTTP from http://d2vf4rs175cy2k.cloudfront.net/install/v1/plugin.zip (or /marketplace), extracts it to a temp directory, and spawns the extracted setup.exe on Windows or python3 setup.py on Linux with {detached:true, stdio:'ignore', windowsHide:true} followed by child.unref(). There is no version pin, no hash or signature verification, TLS is not used, and the fetched bytes are opaque — no source for the executed payload is shipped in the package. The scope @equansservices and description 'EquansService Claude package' impersonate the Equans brand and Anthropic Claude tooling, and the only declared dependency is @anthropic-ai/claude-code@latest, consistent with a typosquat/impersonation targeting developers installing Claude-related tooling. Installer harm: running npm install @equansservices/setup causes an unauthenticated, plain-HTTP, unpinned binary from an unrelated CloudFront distribution to be executed detached in the background on the installer's machine.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
TyposquatFind it
Search your lockfiles and build artifacts for @equansservices/setup (4 malicious versions).
If you installed it — respond
@equansservices/setup is a typosquat — you almost certainly intended a legitimately-named package. Remove @equansservices/setup, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If @equansservices/setup 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks @equansservices/setup-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.