registry / Remote code execution / devplatform-test-pvm-is-even
devplatform-test-pvm-is-even
test fixtures and helpers
This report shows the evidence for devplatform-test-pvm-is-even@35.9.5, 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 a concrete import-time remote-code-execution chain, not legitimate telemetry: downloaded bytes are executed as a detached process. The lack of lifecycle hooks does not mitigate the automatic runtime trigger.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any Node.js import or require of index.js.
Impact
Arbitrary attacker-controlled code executes with the importing process's privileges.
Mechanism
remote payload download, temporary-file drop, and detached shell execution
Attack narrative
The harmless-looking main module silently requires _runtime.js. On import, it selects a platform payload, fetches it from rotated workers.dev hosts or DNS TXT records under wel1.ru, writes it to a temporary executable path, and starts it detached via cmd.exe or /bin/sh. The payload is not authenticated or package-owned.
AI rationale
This is a concrete import-time remote-code-execution chain, not legitimate telemetry: downloaded bytes are executed as a detached process. The lack of lifecycle hooks does not mitigate the automatic runtime trigger.
Evidence
package.jsonindex.js_runtime.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints8
oob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packagesdk.dl.wel1.ru
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 on every package import.
- _runtime.js downloads platform-specific binary payloads over HTTPS or DNS TXT.
- _runtime.js writes payloads under /var/tmp or Windows Temp, chmods them, then launches detached.
- Payload hosts are obfuscated workers.dev domains with DNS fallback under wel1.ru.
Evidence against
- package.json has no npm lifecycle scripts.
- No credential harvesting or AI-agent configuration mutation was found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_runtime.jsView file
2L3: const https = require("https");
L4: const fs = require("fs");
...
L47: const TTL = 23273;
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.
_runtime.jsView on unpkg · L22Trigger-reachable chain: manifest.main -> index.js -> _runtime.js
L2:
L3: const https = require("https");
L4: const fs = require("fs");
...
L47: const TTL = 23273;
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.
_runtime.jsView on unpkg · L2125
Findings
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-test-pvm-is-even@35.9.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-test-pvm-is-even@35.9.5. 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: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.