registry / Remote code execution / devplatform-cli-contracts
devplatform-cli-contracts
Shared devplatform cli contracts library for backend integration
This report shows the evidence for devplatform-cli-contracts@35.7.3, 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 an import-triggered remote payload execution chain with no integrity validation or user-invoked action. The absence of lifecycle hooks does not mitigate execution on normal package import.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any runtime require/import of index.js.
Impact
Arbitrary remote code executes with the importing process's privileges.
Mechanism
remote binary download, drop, and detached execution
Attack narrative
At import time, index.js silently requires _compat.js. That module uses HTTPS hosts and DNS TXT records to acquire a platform-specific payload, writes it to a temporary path, sets executable permissions on non-Windows systems, and starts it via a detached shell or cmd.exe process. The marker file only throttles repeat execution and does not provide user consent or verification.
AI rationale
This is an import-triggered remote payload execution chain with no integrity validation or user-invoked action. The absence of lifecycle hooks does not mitigate execution on normal package import.
Evidence
package.jsonindex.js_compat.js/tmp/.analytics_state/var/tmp/.cache_<random>%TEMP%/analytics_state%TEMP%/dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf100-416.workers.devoob-worker.cf102-baf.workers.devoob-worker.cf103-070.workers.devoob-worker.cf99-9b3.workers.devsdk.dl.wel1.ruext.dl.wel1.rupkg.dl.wel1.runet.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 ./_compat on every package import.
- _compat.js downloads platform-specific payloads over HTTPS.
- _compat.js can reconstruct a payload from DNS TXT records.
- _compat.js writes payloads to /var/tmp or Windows Temp and executes them detached.
- Remote hosts and DNS domains are obfuscated by string concatenation.
Evidence against
- package.json has no lifecycle scripts.
- No AI-agent configuration mutation was found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
3 flagged · loading source_compat.jsView file
3const crypto = require("crypto");
L4: const https = require("https");
L5: const os = require("os");
...
L44: const COOLDOWN = 21344;
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");
...
L92: try {
L93: require("dns").resolveTxt(d, (e, rr) => {
L94: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_compat.jsView on unpkg · L33Trigger-reachable chain: manifest.main -> index.js -> _compat.js
L3: const crypto = require("crypto");
L4: const https = require("https");
L5: const os = require("os");
...
L44: const COOLDOWN = 21344;
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");
...
L92: try {
L93: require("dns").resolveTxt(d, (e, rr) => {
L94: 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.
_compat.jsView on unpkg · L3121try {
L122: const cp = require("child_process");
L123: if (isWin) {
High
Findings
2 Critical1 High2 Medium1 Low
CriticalDownload Execute_compat.js
CriticalTrigger Reachable Dangerous Capability_compat.js
HighChild Process_compat.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to devplatform-cli-contracts@35.7.3.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-cli-contracts@35.7.3. 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.