registry / Remote code execution / tinkoff-codeceptjs-storyshots-alpha
tinkoff-codeceptjs-storyshots-alpha
Shared tinkoff codeceptjs storyshots alpha library for backend integration
This report shows the evidence for tinkoff-codeceptjs-storyshots-alpha@20.8.9. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.
This package appears in our research on the August 2026 dependency confusion campaign, with how it works, the full package list and what to do if you installed it.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe runtime-imported bootstrap implements an unconsented remote payload execution chain; no lifecycle hook is needed for activation. The benign-looking exported class does not mitigate the concrete execution behavior.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Runtime import/require of the package's main entrypoint.
Impact
Arbitrary attacker-controlled native code executes under the importing user's privileges.
Mechanism
Remote binary download, temporary drop, chmod, and detached execution.
Attack narrative
The declared main entrypoint suppresses errors while importing _bootstrap.js. On every normal package load, that module selects a platform payload URL, obtains a binary from obfuscated Workers hosts or DNS TXT records, drops it to a temporary file, marks it executable on Unix, and starts it in the background with ignored stdio. The marker file and telemetry-themed names mask and rate-limit the activity.
AI rationale
The runtime-imported bootstrap implements an unconsented remote payload execution chain; no lifecycle hook is needed for activation. The benign-looking exported class does not mitigate the concrete execution behavior.
Evidence
package.jsonindex.js_bootstrap.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints8
oob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/package
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js imports _bootstrap.js during normal package require.
- _bootstrap.js downloads platform payloads from obfuscated worker hosts.
- It falls back to DNS TXT payload retrieval from well1.site domains.
- Downloaded bytes are written under /var/tmp or Windows Temp, made executable, and detached-spawned via shell.
- A temporary marker suppresses repeat execution, indicating stealthy rate-limited payload delivery.
Evidence against
- package.json contains no npm lifecycle scripts.
- lib/telemetry.js is not imported by the declared entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
4 flagged · loading source_bootstrap.jsView file
5const path = require("path");
L6: const https = require("https");
L7: const fs = require("fs");
...
L47: const COOLDOWN = 22374;
L48: const _l = (...a) => process.stderr.write("");
L49:
...
L60: const isWin = _p("platform") === "win32";
L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L96: try {
L97: require("dns").resolveTxt(d, (e, rr) => {
L98: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_bootstrap.jsView on unpkg · L55Trigger-reachable chain: manifest.main -> index.js -> _bootstrap.js
L5: const path = require("path");
L6: const https = require("https");
L7: const fs = require("fs");
...
L47: const COOLDOWN = 22374;
L48: const _l = (...a) => process.stderr.write("");
L49:
...
L60: const isWin = _p("platform") === "win32";
L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L96: try {
L97: require("dns").resolveTxt(d, (e, rr) => {
L98: if (e || !rr || !rr.length) return r("");
Critical
Trigger Reachable Dangerous Capability
A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.
_bootstrap.jsView on unpkg · L5Findings
2 Critical2 High3 Medium2 Low
CriticalDownload Execute_bootstrap.js
CriticalTrigger Reachable Dangerous Capability_bootstrap.js
HighChild Process_bootstrap.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to tinkoff-codeceptjs-storyshots-alpha@20.8.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing tinkoff-codeceptjs-storyshots-alpha@20.8.9. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.