time-utils-helpernpm
Advisory published Updated
time-utils-helper is a confirmed malicious npm package (MAL-2026-12225) 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 time-utils-helper (npm)
What this malware does
The package advertises itself as a time-formatting utility (index.js exports formatDate/capitalize/truncate) but ships a postinstall.js lifecycle script that runs on npm install and performs unrelated cloud credential harvesting. postinstall.js uses child_process.exec to shell out to curl against multi-cloud instance metadata services (AWS 169.254.169.254, Aliyun 100.100.100.200, Tencent metadata.tencentyun.com, GCP metadata.google.internal, Azure), extracts AWS IAM security credentials for the instance role into /tmp/.iam-creds, and transmits hostname, user, and the IAM credential material as HTTP GET query-string parameters to the hardcoded Burp Collaborator subdomain pzs5w7ntzhsnepwk564lyfdci3oucl0a.oastify.com. The mismatch between the declared trivial utility purpose and the install-time cloud-metadata scraping identifies the package as a decoy delivery vehicle for credential theft.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for time-utils-helper (version 1.0.0).
If you installed it — respond
time-utils-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 time-utils-helper 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
- ReversingLabs · finder
Detect & block this
O3 blocks time-utils-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.