color-convert-helpernpm
color-convert-helper is a confirmed malicious npm package (MAL-2026-11134) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in color-convert-helper (npm)
What this malware does
The package's postinstall.js runs automatically on npm install and executes a shell pipeline that collects host identity (hostname, whoami, id, sudo -l, uname), CI/GitHub Actions environment variables, network interface information, running processes, and environment variables filtered by KEY/TOKEN/SECRET/CREDENTIAL/NPM/AZURE/GCP/CLOUD, then queries cloud instance-metadata endpoints (AWS/Aliyun/GCP/Tencent at 169.254.169.254) to fetch IAM security credentials. The collected data is base64-encoded and curled to the hardcoded attacker-controlled OAST domain pzs5w7ntzhsnepwk564lyfdci3oucl0a.oastify.com. The script also performs DNS and HTTP probes against the internal hostname tst.woa.com and issues an SSRF forwarder request, reporting resolvability back to the same OAST domain. The advertised purpose of the package is color conversion; the actual behavior is credential and cloud-IAM harvesting plus internal-perimeter reconnaissance from every install host.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for color-convert-helper (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging color-convert-helper across your stack and pipelines.
If you installed it — respond
color-convert-helper 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 color-convert-helper was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks color-convert-helper before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks color-convert-helper-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.