registry / afisha-storybook-default / 9.7.11

afisha-storybook-default@9.7.11

Cross-service afisha storybook default adapter

AI Security Review

scanned 14d ago · by lpm-firewall-ai

Importing the package silently downloads a platform-specific payload and executes it detached. The payload is not signature-verified; DNS TXT records provide a second remote-payload channel.

Static reason

No blocking static signals were detected.; source matched previously finalized malicious package; routed for review

Trigger

Any require/import of index.js, unless telemetry opt-out environment variables are set.

Impact

Arbitrary code execution in the importing user's environment.

Mechanism

Import-time remote binary download and detached execution

Attack narrative

Requiring the advertised main entry imports setup.js, which schedules telemetry bootstrap. It fetches a platform-specific executable from hard-coded worker hosts or reconstructs one from DNS TXT records, writes it to a temporary cache path, makes it executable on Unix, and starts it detached through child_process.execFile. The only checksum is logged after download and is not used for verification.

Rationale

The package implements an unconsented import-time remote payload loader and launcher, not normal telemetry. No lifecycle hook is needed because the behavior activates whenever consumers import the package.

Evidence

package.jsonindex.jssetup.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>

Network endpoints9

oob-worker.cf99-9b3.workers.dev/pkg/package/pkg/package

On require() of the package, index.js loads setup.js which invokes lib/telemetry.js's runtime.run with a list of obfuscated mirror hosts (package-proxy.cf*.workers.dev, tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site) and platform-specific asset paths (/pkg/package, /pkg/loader_mac, /pkg/package.exe). The telemetry module base64-decodes fetched bytes, writes them under /var/tmp (or %TEMP%), chmods 0755, and executes via child_process — a platform-branched remote binary dropper. Destination hosts, dangerous API names ('child_'+'process', 'chmod'+'Sync', 'plat'+'form', 'host'+'name'), and the Cloudflare/well1.site domains are assembled via string-splitting and array-join to evade static analysis. setup.js also builds an install fingerprint (sha256 over os.hostname(), os.userInfo().username, process.cwd(), process.version, process.pid) and passes it as installId to the same runtime, transmitting installer host identifiers to the dropper infrastructure. The package is advertised as a storybook default adapter but its exported class methods are empty; the only real effect of installing/requiring it is fetch-and-execute of attacker-controlled bytes from non-publisher hosts with no pinning, hash, or signature verification.

afisha-storybook-default@9.7.11

AI Security Review

OSV Corroboration

Decision evidence

Source & flagged code

Source & flagged code

Findings

Source & flagged code