registry / bnpl-blocks-desktop-bnpl-anchor-title / 35.2.5

bnpl-blocks-desktop-bnpl-anchor-title@35.2.5

Shared bnpl blocks desktop bnpl anchor title library for backend integration

AI Security Review

scanned 9d ago · by lpm-firewall-ai

Importing the declared main entrypoint triggers a hidden downloader. It retrieves an unverified native payload, stores it in a temporary directory, and executes it detached.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review

Trigger

require/import of the package main entrypoint

Impact

Arbitrary remote code execution under the importing user's permissions.

Mechanism

remote binary download/DNS payload staging and detached execution

Attack narrative

Requiring index.js silently loads _bootstrap.js. Its async initializer selects a platform payload path, downloads bytes from hard-coded worker domains or reconstructs bytes from DNS TXT records, writes them as a temporary executable, chmods Unix payloads, then launches them detached through /bin/sh or cmd.exe. The hidden network hosts, payload staging, and execution are unrelated to the advertised minimal SDK.

Rationale

The declared entrypoint performs concrete, automatic remote payload execution at import time. No install hook is needed for this to be a malicious RCE chain.

Evidence

package.jsonindex.js_bootstrap.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>%TEMP%\analytics_state%TEMP%\dotnet_diag_<random>.exe

Network endpoints7

oob-worker.cf103-070.workers.dev/pkg/package

On `require()` of this package, `_bootstrap.js` downloads a platform-specific binary from author-controlled Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) and fallback hosts under dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), writes it to a temp path, sets it executable (chmod 0755), and spawns it detached via `/bin/sh -c` (with a `cmd` branch for Windows). The destination hostnames and API names are reassembled at runtime from split string fragments (e.g. ["oob-wo","rker.cf1","01-adf",".wo","rkers",".dev"].join(""), fs["chmod"+"Sync"]) to evade literal-string scanning. The binary is fetched unpinned and unverified from non-publisher infrastructure; the package presents an analytics/telemetry cover story. `lib/telemetry.js` contains parallel dropper primitives (base64-chunked reassembly, chmod-to-755, detached /bin/sh spawn) as a staged variant. ## Source: ghsa-malware (7bb822811593f71f73b902dd97533951c4852a161f16e71e100291d388792fc5) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

bnpl-blocks-desktop-bnpl-anchor-title@35.2.5

AI Security Review

OSV Corroboration

Decision evidence

Source & flagged code

Source & flagged code

Findings

Source & flagged code