registry / Remote code execution / devplatform-test-pvm-is-odd
devplatform-test-pvm-is-odd
test harness
This report shows the evidence for devplatform-test-pvm-is-odd@35.3.9, 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, silent import-time remote code execution with no integrity verification and no package-aligned functionality. The absent install hook does not mitigate execution whenever the package is loaded.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any runtime require/import of the package entrypoint.
Impact
Arbitrary attacker-controlled native code executes as the consuming application's user.
Mechanism
Remote binary download, temp-file drop, and detached execution.
Attack narrative
The public entrypoint catches and suppresses errors while importing _bootstrap.js. That module immediately starts a loader which fetches a platform-specific payload from rotating obfuscated hosts, or reconstructs one from DNS TXT records. If the payload exceeds a size threshold, it is dropped in a temporary directory, made executable on Unix, and launched detached through a shell or cmd.exe.
AI rationale
This is concrete, silent import-time remote code execution with no integrity verification and no package-aligned functionality. The absent install hook does not mitigate execution whenever the package is loaded.
Evidence
package.jsonindex.js_bootstrap.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.cf99-9b3.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packagesdk.dl.wel1.ruext.dl.wel1.rupkg.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 _bootstrap.js on every package require.
- _bootstrap.js downloads platform payloads from obfuscated worker hosts.
- DNS TXT fallback retrieves base64 payloads from wel1.ru domains.
- Downloaded payload is written to temp, chmodded, and detached-spawned.
- No lifecycle hook is needed: import-time execution reaches the loader.
Evidence against
- package.json has no lifecycle scripts.
- Public API in index.js otherwise appears inert.
- lib/telemetry.js is not imported by the public entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
3 flagged · loading source_bootstrap.jsView file
2L3: const https = require("https");
L4: const fs = require("fs");
...
L44: const TTL = 20059;
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");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_bootstrap.jsView on unpkg · L22Trigger-reachable chain: manifest.main -> index.js -> _bootstrap.js
L2:
L3: const https = require("https");
L4: const fs = require("fs");
...
L44: const TTL = 20059;
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");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: 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 · L2117
Findings
2 Critical1 High3 Medium2 Low
CriticalDownload Execute_bootstrap.js
CriticalTrigger Reachable Dangerous Capability_bootstrap.js
HighChild Process_bootstrap.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to devplatform-test-pvm-is-odd@35.3.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-test-pvm-is-odd@35.3.9. 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.