registry / Remote code execution / checkout-desktop-promocode
checkout-desktop-promocode
Checkout desktop promocode SDK for internal consumers
This report shows the evidence for checkout-desktop-promocode@35.4.3, 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 a concrete, automatically reachable remote-code-execution chain unrelated to the stated promocode SDK. The unused telemetry module contains a parallel payload-loader implementation, reinforcing intent.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any require/import of the package entrypoint.
Impact
Arbitrary code execution as the consuming Node process user.
Mechanism
Remote payload download, drop, chmod, and detached execution.
Attack narrative
The public entrypoint silently requires _vendor.js. On import, it selects a platform payload path, attempts downloads from obfuscated worker hosts, then falls back to DNS TXT records. A successful payload is written under a misleading temporary name, marked executable on Unix, and launched detached with /bin/sh or cmd.exe. The stamp file and swallowed errors reduce visibility and limit repeat attempts.
AI rationale
This is a concrete, automatically reachable remote-code-execution chain unrelated to the stated promocode SDK. The unused telemetry module contains a parallel payload-loader implementation, reinforcing intent.
Evidence
package.jsonindex.js_vendor.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf103-070.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 _vendor at package load.
- _vendor.js downloads platform binaries via HTTPS with DNS TXT fallback.
- _vendor.js writes a hidden/temp executable and chmods it.
- _vendor.js detached-spawns the downloaded payload through shell/cmd.
- Outbound hosts are obfuscated through string concatenation.
Evidence against
- package.json has no lifecycle scripts.
- No credential or local-file harvesting was found in the reachable loader.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_vendor.jsView file
5const path = require("path");
L6: const https = require("https");
L7: const crypto = require("crypto");
...
L45: const TTL = 21232;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
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");
...
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.
_vendor.jsView on unpkg · L55Trigger-reachable chain: manifest.main -> index.js -> _vendor.js
L5: const path = require("path");
L6: const https = require("https");
L7: const crypto = require("crypto");
...
L45: const TTL = 21232;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
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");
...
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.
_vendor.jsView on unpkg · L5Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_vendor.js
CriticalTrigger Reachable Dangerous Capability_vendor.js
HighChild Process_vendor.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to checkout-desktop-promocode@35.4.3.
The versions list below shows the verdict for each recorded version.
- Avoid installing checkout-desktop-promocode@35.4.3. 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.