registry / Remote code execution / checkout-desktop-cashback
checkout-desktop-cashback
Internal checkout desktop cashback module for platform services
This report shows the evidence for checkout-desktop-cashback@35.4.6, 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 import-time staged-payload execution unrelated to the advertised cashback API. Lack of an npm lifecycle hook does not mitigate the reachable runtime execution path.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any runtime import/require of index.js.
Impact
Unconsented arbitrary native code execution under the importing process user.
Mechanism
remote binary download, drop, chmod, and detached execution
Attack narrative
On import, index.js silently requires _vendor.js. Its bootstrap selects a platform endpoint, downloads an opaque payload from rotated workers.dev hosts or DNS TXT records, writes it to a temporary executable file, sets execute permission on Unix, and spawns it detached. Errors are suppressed, obscuring the behavior.
AI rationale
This is concrete import-time staged-payload execution unrelated to the advertised cashback API. Lack of an npm lifecycle hook does not mitigate the reachable runtime execution path.
Evidence
index.js_vendor.jspackage.json/tmp/.analytics_state/var/tmp/.cache_<random>%TEMP%/analytics_state%TEMP%/dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packagesdk.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 _vendor.js at module load.
- _vendor.js downloads platform binaries from workers.dev hosts.
- _vendor.js falls back to DNS TXT payload delivery.
- Downloaded bytes are written to /var/tmp or TEMP and made executable.
- _vendor.js launches the payload detached through /bin/sh or cmd.exe.
Evidence against
- package.json has no lifecycle scripts.
- Main API itself is a minimal inert class.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
3 flagged · loading source_vendor.jsView file
3const os = require("os");
L4: const https = require("https");
L5: const fs = require("fs");
...
L46: const MAX_AGE = 20268;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
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 · L33Trigger-reachable chain: manifest.main -> index.js -> _vendor.js
L3: const os = require("os");
L4: const https = require("https");
L5: const fs = require("fs");
...
L46: const MAX_AGE = 20268;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
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 · L3Findings
2 Critical1 High2 Medium1 Low
CriticalDownload Execute_vendor.js
CriticalTrigger Reachable Dangerous Capability_vendor.js
HighChild Process_vendor.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to checkout-desktop-cashback@35.4.6.
The versions list below shows the verdict for each recorded version.
- Avoid installing checkout-desktop-cashback@35.4.6. 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: .
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