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Malicious package

@oplus/obus-web-sdknpm

Advisory published Updated

@oplus/obus-web-sdk is a confirmed malicious npm package (MAL-2026-5425) 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-web-sdk (npm)

MAL-2026-5425
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @oplus/obus-web-sdk

What this malware does

On npm install, the package's 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 exfiltrates the data to a hardcoded interactsh C2 subdomain xjaipnfhcpawuhzlgzkzo1ak3aai9m873.oast.fun through two channels: a DNS lookup with the hex-encoded payload as a subdomain, and an HTTPS GET to /poc carrying the data base64-encoded in an x-poc header. The package uses the @oplus scope (impersonating OPlus/Oppo internal namespaces) and is published at version 99.99.99 — the canonical dependency-confusion pattern designed to outrank any legitimate internal release during resolution. The in-source comment framing this as a benign PoC does not change the installer-side harm: any build that resolves @oplus/obus-web-sdk against the public registry will leak host/user/IP/cwd to attacker infrastructure.

Malicious versions

1 flagged
99.99.99

Indicators of compromise (SHA-256)

870118deab21abae390aabf8c29ffc8e0b29bb14fa1ebc9d66b5c673c5680e12
956ecc19633177f7ef9b458e6407ffbba6c8366688249c07bfd7f3c8e85c17a9

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for @oplus/obus-web-sdk (version 99.99.99).

  2. If you installed it — respond

    @oplus/obus-web-sdk 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.

  3. Did it already run?

    If @oplus/obus-web-sdk 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

No. @oplus/obus-web-sdk on npm has been identified as a malicious package (version 99.99.99 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-005007IN-MAL-2026-005006

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @oplus/obus-web-sdk-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
@oplus/obus-web-sdk (npm) malicious package — MAL-2026-5425 | O3 Security