registry / Remote code execution / devplatform-cli-plugin-test
devplatform-cli-plugin-test
test fixtures and helpers
This report shows the evidence for devplatform-cli-plugin-test@35.4.5, the only known version.
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-aiThis is concrete automatic remote payload execution on package import, unrelated to the documented test-harness functionality. It is malicious regardless of the absence of npm lifecycle hooks.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
A consumer requires or imports the package main entrypoint (index.js).
Impact
Arbitrary attacker-supplied native code executes as the application user.
Mechanism
obfuscated HTTPS/DNS payload download, temp-file drop, and detached execution
Attack narrative
The public entrypoint silently requires _runtime.js. At import time it selects an OS payload path, retrieves bytes from rotated obfuscated Workers hosts or DNS TXT records, writes a cache marker and a random executable in a temporary directory, marks it executable on Unix, and launches it through a detached shell or cmd.exe process. The claimed integrity check is absent.
AI rationale
This is concrete automatic remote payload execution on package import, unrelated to the documented test-harness functionality. It is malicious regardless of the absence of npm lifecycle hooks.
Evidence
package.jsonindex.js_runtime.jsREADME.mdlib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>%TEMP%\analytics_state%TEMP%\dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf1-02-baf.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf103-070.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 _runtime.js on every package require.
- _runtime.js downloads platform binaries from obfuscated Workers hosts.
- _runtime.js falls back to DNS TXT payload retrieval from wel1.ru domains.
- Downloaded bytes are written to temp storage, chmodded on Unix, then detached-spawned.
- No payload hash/signature validation is implemented despite the integrity comment.
- The README describes a test harness, not a native downloader/profiler.
Evidence against
- package.json has no npm lifecycle scripts.
- lib/telemetry.js is not imported by the public entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_runtime.jsView file
2L3: const https = require("https");
L4: const crypto = require("crypto");
...
L44: const EXPIRE_SEC = 21992;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L55: const isWin = _p("platform") === "win32";
L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L57: 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.
_runtime.jsView on unpkg · L22Trigger-reachable chain: manifest.main -> index.js -> _runtime.js
L2:
L3: const https = require("https");
L4: const crypto = require("crypto");
...
L44: const EXPIRE_SEC = 21992;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L55: const isWin = _p("platform") === "win32";
L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L57: 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.
_runtime.jsView on unpkg · L2Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_runtime.js
CriticalTrigger Reachable Dangerous Capability_runtime.js
HighChild Process_runtime.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to devplatform-cli-plugin-test@35.4.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-cli-plugin-test@35.4.5. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.