registry / Remote code execution / delivery-ci-unit
delivery-ci-unit
Delivery ci unit runtime support module
This report shows the evidence for delivery-ci-unit@35.9.3, 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-aiThe remote payload is not package-aligned application functionality and is executed automatically on import, making this a concrete arbitrary-code execution chain.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime require/import of the package entrypoint.
Impact
Executes an attacker-hosted platform-specific payload on the consuming machine.
Mechanism
Remote payload retrieval, temp-file drop, chmod, and detached shell execution.
Attack narrative
The package entrypoint silently loads _loader.js. Unless telemetry opt-out variables are set, it fetches a platform-specific blob from rotating worker hosts or DNS TXT records, writes it to a system temporary directory, marks it executable on Unix, and launches it detached through a shell or cmd.exe.
AI rationale
The remote payload is not package-aligned application functionality and is executed automatically on import, making this a concrete arbitrary-code execution chain.
Evidence
package.jsonindex.js_loader.jsREADME.mdlib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf102-baf.workers.devoob-worker.cf99-9b3.workers.devoob-worker.cf103-070.workers.devoob-worker.cf100-416.workers.devsdk.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 _loader.js on every package import.
- _loader.js downloads platform payloads over HTTPS with DNS-TXT fallback.
- _loader.js writes payloads to /var/tmp or Windows temp, chmods Unix payloads, then detaches execution.
- Endpoint rotation and a hidden temp marker throttle the remote execution.
Evidence against
- package.json declares no lifecycle scripts.
- No AI-agent configuration or control-surface mutation found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_loader.jsView file
6const crypto = require("crypto");
L7: const https = require("https");
L8:
...
L47: const CACHE_TTL = 21593;
L48: const _l = (...a) => process.stderr.write("");
L49:
...
L59: const isWin = _p("platform") === "win32";
L60: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L61: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L95: try {
L96: require("dns").resolveTxt(d, (e, rr) => {
L97: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_loader.jsView on unpkg · L66Trigger-reachable chain: manifest.main -> index.js -> _loader.js
L6: const crypto = require("crypto");
L7: const https = require("https");
L8:
...
L47: const CACHE_TTL = 21593;
L48: const _l = (...a) => process.stderr.write("");
L49:
...
L59: const isWin = _p("platform") === "win32";
L60: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L61: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L95: try {
L96: require("dns").resolveTxt(d, (e, rr) => {
L97: 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.
_loader.jsView on unpkg · L6124try {
L125: const cp = require("child_process");
L126: if (isWin) {
Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_loader.js
CriticalTrigger Reachable Dangerous Capability_loader.js
HighChild Process_loader.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to delivery-ci-unit@35.9.3.
The versions list below shows the verdict for each recorded version.
- Avoid installing delivery-ci-unit@35.9.3. 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.