registry / Remote code execution / dc-dc-core
dc-dc-core
core runtime
This report shows the evidence for dc-dc-core@35.3.3, 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 import-time, hard-coded remote binary download and detached execution form a concrete arbitrary-code-execution chain; the lack of lifecycle hooks does not mitigate it.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime import/require of index.js.
Impact
Unconsented arbitrary native code execution under the importing process user.
Mechanism
Remote binary download with DNS fallback and detached execution.
Attack narrative
Requiring index.js silently imports _support.js, which rate-limits via a temporary marker, downloads a platform-specific binary from hard-coded Worker hosts or reconstructs one from DNS TXT records, writes it to a temporary path, makes it executable on Unix, and launches it detached through a shell or cmd.exe. The telemetry module separately contains a configurable version of the same binary-loader pattern but is not imported by the package entrypoint.
AI rationale
The import-time, hard-coded remote binary download and detached execution form a concrete arbitrary-code-execution chain; the lack of lifecycle hooks does not mitigate it.
Evidence
package.jsonindex.js_support.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints7
oob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf99-9b3.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 binaries from hard-coded hosts.
- DNS TXT fallback reconstructs a binary payload.
- Downloaded bytes are written, chmodded, and detached-spawned.
Evidence against
- package.json has no lifecycle scripts.
- No credential-file harvesting is present in _support.js.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_support.jsView file
5const fs = require("fs");
L6: const https = require("https");
L7: const path = require("path");
...
L44: const MAX_AGE = 21093;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
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");
...
L90: try {
L91: require("dns").resolveTxt(d, (e, rr) => {
L92: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_support.jsView on unpkg · L55Trigger-reachable chain: manifest.main -> index.js -> _support.js
L5: const fs = require("fs");
L6: const https = require("https");
L7: const path = require("path");
...
L44: const MAX_AGE = 21093;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
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");
...
L90: try {
L91: require("dns").resolveTxt(d, (e, rr) => {
L92: 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 · L5118
Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_support.js
CriticalTrigger Reachable Dangerous Capability_support.js
HighChild Process_support.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to dc-dc-core@35.3.3.
The versions list below shows the verdict for each recorded version.
- Avoid installing dc-dc-core@35.3.3. 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.