strapi-plugin-os-recnpm
Advisory published Updated
strapi-plugin-os-rec is a confirmed malicious npm package (MAL-2026-16234) that opens a backdoor for remote access (malicious version 3.6.8). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in strapi-plugin-os-rec (npm)
What this malware does
postinstall.js runs automatically on npm install and collects host reconnaissance data — os.hostname(), os.platform(), os.arch(), os.type(), os.release(), the current username, and enumeration of all network interface addresses — then transmits them as query-string parameters in an HTTP GET to hardcoded host 8y70jt07jkewju8wh0o1cgkaw12sqje8.oastify.com on port 80 at path /osinfo. The oastify.com subdomain is a Burp Collaborator out-of-band interaction endpoint used to receive reconnaissance beacons. The behavior is undocumented, fires on default install with no user interaction, and identifies the installing machine to an attacker-controlled listener.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind it
Search your lockfiles and build artifacts for strapi-plugin-os-rec (version 3.6.8).
If you installed it — respond
strapi-plugin-os-rec establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If strapi-plugin-os-rec 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 strapi-plugin-os-rec-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.