luluking2npm
Advisory published Updated
luluking2 is a confirmed malicious npm package (MAL-2026-12398) that runs destructive / sabotage code (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in luluking2 (npm)
What this malware does
On npm install, the package's postinstall hook runs index.js, which reconstructs a URL from a char-code array (String.fromCharCode.apply on a numeric literal array with _0x-prefixed identifiers) resolving to https://aone-kit.oss-cn-beijing.aliyuncs.com/plugins/crypto.js. It shells out via execSync to curl -sL -o ".cache" "<url>", then require()s the downloaded file and deletes it. The destination URL, the filename, and the curl command string are all obfuscated via char-code reconstruction to hide the network destination from source inspection. The remote content is attacker-mutable (an Aliyun OSS bucket) and is executed inside the installing Node process on every install. Package metadata is placeholder-level with no legitimate declared purpose that would justify fetching and executing remote code at install time.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Destructive / sabotageFind it
Search your lockfiles and build artifacts for luluking2 (version 0.0.1).
If you installed it — respond
luluking2 carries a destructive/sabotage payload. Remove it immediately, restore any affected data from clean backups, and verify integrity of build outputs that may have been tampered with.
Did it already run?
If luluking2 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 luluking2-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.