gen-ai-opt-innpm
gen-ai-opt-in is a confirmed malicious npm package (MAL-2026-6761) that opens a backdoor for remote access (malicious versions 99.0.0, 99.0.1, 99.0.2). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in gen-ai-opt-in (npm)
What this malware does
On npm install, postinstall.js executes automatically and collects installer host identifiers (os.hostname(), os.userInfo().username) plus public IP/geo data fetched from ip-api.com (city, region, country, ISP, org), then transmits them as query-string parameters over plain HTTP to a hardcoded Burp Collaborator subdomain at p1r2d74iwjk057raam6myf7e258wzkt8i.oastify.com. The package ships no legitimate functionality — the tarball's only effect is the recon beacon. The name 'gen-ai-opt-in' combined with version 99.0.2 (an artificially inflated version number) and an empty description matches the dependency-confusion attack shape, where a public package is published to override an organization's internal package of the same name so that a compromised internal build resolves the attacker's copy and executes the postinstall.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
The OpenSSF Package Analysis project identified 'gen-ai-opt-in' @ 99.0.2 (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
Backdoor / remote accessFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for gen-ai-opt-in (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging gen-ai-opt-in across your stack and pipelines.
If you installed it — respond
gen-ai-opt-in 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 gen-ai-opt-in 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 gen-ai-opt-in 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
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks gen-ai-opt-in-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.