lib-frontsganpm
lib-frontsga is a confirmed malicious npm package (MAL-2026-13448) that opens a backdoor for remote access (malicious version 9.999.999). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in lib-frontsga (npm)
What this malware does
Package name 'lib-frontsga' published to the public npm registry at version 9.999.999 targets an internal package name via dependency-confusion resolution. A preinstall/postinstall lifecycle script (poc.js) runs on npm install and collects host identifiers (hostname, username, cwd, Node version) together with CI/build attribution (GITHUB_REPOSITORY, GITHUB_REPOSITORY_OWNER, GITHUB_ACTOR, GITHUB_RUN_ID, GITHUB_WORKFLOW, npm_config_registry, RUNNER_NAME, AWS_REGION, and Azure/Jenkins/GitLab identifiers). The collected data is transmitted to a hardcoded Interactsh callback subdomain via DNS queries and HTTP/HTTPS POST to votspfykpbaortacnitltze3m5k5swzg6.oast.fun. Any organization that internally uses this name without a scoped/internal registry pin will resolve this public copy and execute the install-time beacon, disclosing internal build-environment fingerprints to a third-party out-of-band server.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for lib-frontsga (version 9.999.999). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging lib-frontsga across your stack and pipelines.
If you installed it — respond
lib-frontsga establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If lib-frontsga 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 lib-frontsga 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 lib-frontsga-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.