registry / Remote code execution / delivery-ci-microforms
delivery-ci-microforms
Lightweight delivery ci microforms wrapper
This report shows the evidence for delivery-ci-microforms@35.3.5, 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 import-time downloader/executor is concrete malicious behavior, not package-aligned telemetry. No install hook is needed because normal package use triggers execution.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any runtime require/import of the package entrypoint.
Impact
Arbitrary remote code executes with the importing process's user privileges.
Mechanism
Remote payload download, temporary-file drop, and detached native execution.
Attack narrative
Requiring index.js silently imports _support.js. It selects a platform payload URL, downloads opaque bytes from rotating workers.dev hosts or reconstructs them through DNS TXT records, writes the bytes to a temporary executable, and launches it detached through /bin/sh or cmd.exe. This creates an import-time remote-code-execution chain without user action.
AI rationale
The import-time downloader/executor is concrete malicious behavior, not package-aligned telemetry. No install hook is needed because normal package use triggers execution.
Evidence
package.jsonindex.js_support.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf102-baf.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 _support.js on every package import.
- _support.js downloads platform payloads from obfuscated workers.dev hosts.
- DNS TXT fallback retrieves base64 payloads from dl.wel1.ru.
- Downloaded bytes are written to /var/tmp or Temp, made executable, and detached-spawned via shell/cmd.
- A hidden 21,542-second stamp limits repeat execution.
Evidence against
- package.json has no lifecycle scripts.
- No credential harvesting or data exfiltration is present in the inspected entrypoint chain.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
3 flagged · loading source_support.jsView file
6const os = require("os");
L7: const https = require("https");
L8:
...
L43: const CACHE_TTL = 21542;
L44: const _l = (...a) => process.stderr.write("");
L45:
...
L54: const isWin = _p("platform") === "win32";
L55: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L56: 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
Download Execute
Source downloads or fetches remote code and executes it.
_support.jsView on unpkg · L66Trigger-reachable chain: manifest.main -> index.js -> _support.js
L6: const os = require("os");
L7: const https = require("https");
L8:
...
L43: const CACHE_TTL = 21542;
L44: const _l = (...a) => process.stderr.write("");
L45:
...
L54: const isWin = _p("platform") === "win32";
L55: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L56: 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.
_support.jsView on unpkg · L6116
Findings
2 Critical1 High2 Medium1 Low
CriticalDownload Execute_support.js
CriticalTrigger Reachable Dangerous Capability_support.js
HighChild Process_support.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to delivery-ci-microforms@35.3.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing delivery-ci-microforms@35.3.5. 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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