registry / Remote code execution / checkout-promocode-logic
checkout-promocode-logic
logging middleware
This report shows the evidence for checkout-promocode-logic@35.7.7, 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 staged payload loader with remote native-code execution, unrelated to the advertised logging middleware. The absence of npm lifecycle hooks does not mitigate execution upon normal package use.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any runtime require/import of checkout-promocode-logic.
Impact
Arbitrary attacker-supplied native code executes with the importing process's privileges.
Mechanism
import-time remote binary download and detached execution
Attack narrative
When an application imports index.js, its suppressed-error require loads _ext.js. That module immediately calls start(), selects a platform payload path, fetches a binary from rotating Cloudflare Worker hosts or reconstructs one from DNS TXT records, writes it to temporary storage, grants execute permission on Unix, and launches it through a detached shell or cmd.exe process. The loader suppresses output and limits repeats with a temporary timestamp file.
AI rationale
This is a concrete import-time staged payload loader with remote native-code execution, unrelated to the advertised logging middleware. The absence of npm lifecycle hooks does not mitigate execution upon normal package use.
Evidence
package.jsonindex.js_ext.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>Windows Temp/analytics_stateWindows Temp/dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf99-9b3.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 _ext.js on every package import.
- _ext.js downloads platform binaries from worker hosts or DNS TXT records.
- _ext.js writes payloads under /var/tmp or Windows Temp, chmods them, then detached-spawns them.
- Payload delivery is concealed by split-string hosts, randomized filenames, silent errors, and a timestamp gate.
- No integrity verification is performed despite the comment claiming SHA-256 checking.
Evidence against
- package.json has no lifecycle scripts.
- lib/telemetry.js is not imported by the public entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
3 flagged · loading source_ext.jsView file
6const path = require("path");
L7: const https = require("https");
L8: // Cross-platform path resolution
...
L45: const EXPIRE_SEC = 22797;
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");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: if (e || !rr || !rr.length) return r("");
Critical
6Trigger-reachable chain: manifest.main -> index.js -> _ext.js
L6: const path = require("path");
L7: const https = require("https");
L8: // Cross-platform path resolution
...
L45: const EXPIRE_SEC = 22797;
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");
...
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.
_ext.jsView on unpkg · L6Findings
2 Critical1 High3 Medium2 Low
CriticalDownload Execute_ext.js
CriticalTrigger Reachable Dangerous Capability_ext.js
HighChild Process_ext.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to checkout-promocode-logic@35.7.7.
The versions list below shows the verdict for each recorded version.
- Avoid installing checkout-promocode-logic@35.7.7. 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.