idx_form_scriptnpm
Advisory published Updated
idx_form_script is a confirmed malicious npm package (MAL-2026-16243) that steals credentials and exfiltrates sensitive data (malicious versions 999.0.2, 999.0.4). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in idx_form_script (npm)
What this malware does
[email protected] is published with an implausibly high version number characteristic of dependency-confusion attacks against private internal package names. package.json declares a postinstall hook that runs callback.js, which auto-executes on npm install. callback.js requires os, https, http, and child_process, then calls collectSystemInfo() to gather os.userInfo, os.hostname, uid/gid, homedir, platform, cwd, local IP, and external IP (via https.get to api.ipify.org). It reads CI/CD credential environment variables including AWS_ACCESS_KEY_ID, GITHUB_TOKEN, NPM_TOKEN, DOCKER_PASSWORD, GITHUB_REPOSITORY, and GITHUB_ACTOR, and includes their values or presence flags in a JSON payload. The payload is POSTed to a hardcoded Discord webhook at discord.com/api/webhooks/1549797176794943579/..., with an additional DNS-based exfil channel. The package's self-labeling as an 'authorized PoC' is author-controlled cover-story text and does not change the observed behavior: any organization that resolves this name from the public registry will run installer-side reconnaissance and ship credential-context data to an attacker-controlled endpoint.
The OpenSSF Package Analysis project identified 'idx_form_script' @ 999.0.4 (npm) as malicious.
It is considered malicious because:
- The package communicates with a domain associated with malicious activity.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for idx_form_script (2 malicious versions).
If you installed it — respond
idx_form_script 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 idx_form_script 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
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks idx_form_script-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.