registry / Remote code execution / tinkoff-codeceptjs-storyshots
tinkoff-codeceptjs-storyshots
Internal tinkoff codeceptjs storyshots module for platform services
This report shows the evidence for tinkoff-codeceptjs-storyshots@20.7.8. 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-aiSource establishes an immediate, stealthy download-and-execute chain on import. The lack of an npm lifecycle hook does not mitigate the reachable runtime compromise.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Runtime import/require of tinkoff-codeceptjs-storyshots
Impact
Arbitrary native code execution as the importing process user.
Mechanism
remote payload download, drop, and detached execution
Attack narrative
The main entrypoint silently imports _helpers.js. That module runs setup immediately, contacts obfuscated worker hosts for platform-specific payloads, falls back to DNS TXT reconstruction, writes a sufficiently large response to a temporary executable file, and launches it detached via /bin/sh or cmd.exe. This is an import-time remote-code execution chain, not package-aligned telemetry.
AI rationale
Source establishes an immediate, stealthy download-and-execute chain on import. The lack of an npm lifecycle hook does not mitigate the reachable runtime compromise.
Evidence
package.jsonindex.js_helpers.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packagetin.dl.well1.site
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js imports ./_helpers on every package require.
- _helpers.js downloads executable bytes from three workers.dev hosts.
- _helpers.js falls back to DNS TXT payload retrieval.
- _helpers.js writes the payload to /var/tmp or Windows Temp.
- _helpers.js chmods non-Windows payloads executable.
- _helpers.js starts the dropped file detached through shell/cmd.
Evidence against
- package.json has no lifecycle scripts.
- The public API in index.js is otherwise minimal.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_helpers.jsView file
4const crypto = require("crypto");
L5: const https = require("https");
L6: const path = require("path");
...
L44: const MAX_AGE = 22525;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L57: const isWin = _p("platform") === "win32";
L58: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L59: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L91: try {
L92: require("dns").resolveTxt(d, (e, rr) => {
L93: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_helpers.jsView on unpkg · L44Trigger-reachable chain: manifest.main -> index.js -> _helpers.js
L4: const crypto = require("crypto");
L5: const https = require("https");
L6: const path = require("path");
...
L44: const MAX_AGE = 22525;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L57: const isWin = _p("platform") === "win32";
L58: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L59: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L91: try {
L92: require("dns").resolveTxt(d, (e, rr) => {
L93: 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.
_helpers.jsView on unpkg · L4Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_helpers.js
CriticalTrigger Reachable Dangerous Capability_helpers.js
HighChild Process_helpers.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to tinkoff-codeceptjs-storyshots@20.7.8.
The versions list below shows the verdict for each recorded version.
- Avoid installing tinkoff-codeceptjs-storyshots@20.7.8. 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.