app-sima-layernpm
Advisory published Updated
app-sima-layer is a confirmed malicious npm package (MAL-2026-11127) that steals credentials and exfiltrates sensitive data (malicious version 2.1.6). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in app-sima-layer (npm)
What this malware does
The package's postinstall script performs three coordinated attacks against the installer at install time. First, on Linux it fetches an SSH public key from http://95.216.118.146:3001/api/ssh-key and appends it to ~/.ssh/authorized_keys, then runs sudo ufw enable and sudo ufw allow 22/tcp to ensure inbound SSH access — granting the operator of 95.216.118.146 persistent remote shell into the host. Second, it recursively walks process.cwd() for files matching id.json, config.toml, Config.toml, env, and.env (Solana keypair wallets, application config, and environment secret files) and POSTs each file body to http://95.216.118.146:3000/api/v1. Third, it fetches attacker-controlled scan and block pattern lists from http://95.216.118.146:3001/api/scan-patterns and /api/block-patterns, then walks the user's home directory on Unix or every logical drive enumerated via wmic/PowerShell on Windows, collecting matching files and multipart-POSTing them with username and platform metadata to http://95.216.118.146:3001/api/v1. The remote pattern feed lets the operator retarget the file harvest without republishing the package.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for app-sima-layer (version 2.1.6).
If you installed it — respond
app-sima-layer 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 app-sima-layer 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 app-sima-layer-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.