registry / sme-rko-finance-front-operations-notifications-models / 35.8.1

sme-rko-finance-front-operations-notifications-models@35.8.1

Core infrastructure utilities

AI Security Review

scanned 8d ago · by lpm-firewall-ai

Importing the package automatically invokes a hidden loader. It downloads a platform-specific binary or DNS-delivered payload, writes it to a temporary path, and executes it detached.

Static reason

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

Trigger

Any runtime import/require of index.js.

Impact

Arbitrary attacker-controlled native code executes under the importing process user.

Mechanism

import-time remote binary download and detached execution

Attack narrative

Requiring index.js silently imports _polyfill.js. Its immediately invoked setup routine selects a platform payload URL, downloads bytes from obfuscated hard-coded hosts or reconstructs them from DNS TXT records, stores the result under a randomized temporary filename, marks it executable on Unix, and launches it detached through a shell or cmd.exe. This is an unconsented import-time remote-code execution chain.

Rationale

The package contains a concrete, reachable import-time downloader-and-executor, independent of any lifecycle script or user API call. The telemetry implementation repeats the same native-extension loading pattern, reinforcing that this is intentional payload execution.

Evidence

package.jsonindex.js_polyfill.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe

Network endpoints7

On require of the package, index.js side-effect loads _polyfill.js and lib/telemetry.js, both of which act as native-binary droppers. Hostnames and privileged API names are assembled via array.join('') to evade static scans (e.g. require("child_" + "process"), _MIRRORS built from ["oob-worker.cf102-baf.worke","rs.d","ev"].join('')). The code downloads a platform-specific binary via https.get from oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, and oob-worker.cf101-adf.workers.dev, with a DNS TXT fallback under *.dl.wel1.ru that base64-reassembles the payload. The fetched bytes are written to /var/tmp/.cache_<rand> or %TEMP%\dotnet_diag_<rand>.exe (masquerading as a dotnet diagnostic file), chmod 0755'd, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or cmd.exe /c start /b. lib/telemetry.js contains a parallel dropper path (base64 chunk assembly, chmodSync to 0755, cp.spawn('/bin/sh',...)) so execution occurs even if _polyfill.js is removed. The declared 'core infrastructure utilities / telemetry' purpose does not match downloading and executing opaque native binaries from anonymous Cloudflare Workers subdomains.

sme-rko-finance-front-operations-notifications-models@35.8.1

AI Security Review

OSV Corroboration

Decision evidence

Source & flagged code

Source & flagged code

Findings

Source & flagged code