@oplus/obus-corenpm
Advisory published Updated
@oplus/obus-core is a confirmed malicious npm package (MAL-2026-5424) that steals credentials and exfiltrates sensitive data (malicious version 99.99.99). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in @oplus/obus-core (npm)
What this malware does
On npm install, scripts/postinstall.js collects the installer's username (os.userInfo()), hostname (os.hostname()), current working directory (process.cwd()), and public IP (fetched from https://api.ipify.org), then ships this data to a hardcoded interactsh callback at xjaipnfhcpawuhzlgzkzo1ak3aai9m873.oast.fun through two channels: (1) a DNS lookup whose label is the hex-encoded payload prefixed onto the C2 domain, and (2) an HTTPS GET to /poc with the JSON payload base64-encoded in an x-poc header. The package is published at version 99.99.99 under the @oplus scope (mirroring OPlus/Oppo internal naming) — the textbook dependency-confusion shape designed to outrank an internal counterpart during resolution. A source comment self-labels the package as a 'Dependency Confusion PoC - Bug Bounty Research', but the exfiltration fires on every install regardless of stated intent: any developer or build system that resolves this package leaks host identifiers to the attacker-controlled callback domain.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for @oplus/obus-core (version 99.99.99).
If you installed it — respond
@oplus/obus-core 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 @oplus/obus-core 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
Detect & block this
O3 blocks @oplus/obus-core-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.