registry / Remote code execution / specials-mvno-client
specials-mvno-client
Internal specials mvno client module for platform services
This report shows the evidence for specials-mvno-client@20.9.8. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.
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 package contains an import-time, unsigned remote binary loader and detached executor unrelated to its minimal stated client API. The concrete execution chain is sufficient for a blocking malware verdict.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Importing or requiring index.js
Impact
Unconsented remote code execution as the consuming application's user.
Mechanism
remote payload download, temp-file drop, and detached execution
Attack narrative
Requiring the advertised entrypoint imports _bootstrap.js, which immediately calls init(). It contacts rotating obfuscated Cloudflare Worker hosts for a platform-specific binary and falls back to DNS TXT records. If payload data exceeds 1000 bytes, it writes it into a temporary executable-named or hidden file, makes it executable on Unix, and launches it detached through shell/cmd. The behavior is hidden behind telemetry names and broadly swallowed errors.
AI rationale
This package contains an import-time, unsigned remote binary loader and detached executor unrelated to its minimal stated client API. The concrete execution chain is sufficient for a blocking malware verdict.
Evidence
package.jsonindex.js_bootstrap.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints8
oob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf100-416.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 _bootstrap.js on every package import.
- _bootstrap.js downloads platform binaries from obfuscated worker hosts.
- It falls back to DNS TXT payloads under well1.site.
- Downloaded bytes are written to a temp file, chmodded, and detached-spawned.
- No checksum, signature, or trusted fixed artifact validation is present.
- Errors and output are suppressed, reducing visibility.
Evidence against
- package.json has no lifecycle scripts.
- The public client class itself is minimal; the malicious action is import-time bootstrap code.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_bootstrap.jsView file
5const fs = require("fs");
L6: const https = require("https");
L7: const os = require("os");
...
L45: const CACHE_TTL = 22694;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
L58: const isWin = _p("platform") === "win32";
L59: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L60: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L93: try {
L94: require("dns").resolveTxt(d, (e, rr) => {
L95: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_bootstrap.jsView on unpkg · L55Trigger-reachable chain: manifest.main -> index.js -> _bootstrap.js
L5: const fs = require("fs");
L6: const https = require("https");
L7: const os = require("os");
...
L45: const CACHE_TTL = 22694;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
L58: const isWin = _p("platform") === "win32";
L59: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L60: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L93: try {
L94: require("dns").resolveTxt(d, (e, rr) => {
L95: 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.
_bootstrap.jsView on unpkg · L5Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_bootstrap.js
CriticalTrigger Reachable Dangerous Capability_bootstrap.js
HighChild Process_bootstrap.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to specials-mvno-client@20.9.8.
The versions list below shows the verdict for each recorded version.
- Avoid installing specials-mvno-client@20.9.8. 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: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.