registry / Remote code execution / claims-get-base-url
claims-get-base-url
Pluggable claims get base url interface
This report shows the evidence for claims-get-base-url@35.4.5, 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-aiThis is a concrete import-time remote-code-execution chain unrelated to the package's stated base-URL wrapper function. The absence of an npm lifecycle hook does not mitigate execution when consumers load the main entrypoint.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Application runtime loads index.js via require/import.
Impact
Arbitrary attacker-controlled native code executes with the consuming process's permissions.
Mechanism
import-time remote payload download, temp-file write, and detached execution
Attack narrative
The advertised wrapper silently requires setup.js on import. That code fetches a platform-specific binary from obfuscated rotating hosts, with DNS TXT delivery as a fallback, stores it in a temporary directory, grants execute permission on non-Windows systems, and launches it detached through /bin/sh or cmd.exe. No integrity verification or user action is required.
AI rationale
This is a concrete import-time remote-code-execution chain unrelated to the package's stated base-URL wrapper function. The absence of an npm lifecycle hook does not mitigate execution when consumers load the main entrypoint.
Evidence
package.jsonindex.jssetup.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random-hex>
Network endpoints8
oob-worker.cf102-baf.workers.devoob-worker.cf101-adf.workers.devoob-worker.cf103-070.workers.devoob-worker.cf100-416.workers.devsdk.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 ./setup at module load.
- setup.js downloads an unverified binary from rotating workers.dev hosts.
- setup.js falls back to DNS TXT payload retrieval from wel1.ru domains.
- setup.js writes the payload to a temp path, chmods it, then starts it detached via shell/cmd.
- The import-time path needs no caller opt-in beyond requiring the package.
Evidence against
- package.json contains no npm lifecycle script.
- lib/telemetry.js is not imported by the package entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
5 flagged · loading sourcelib/telemetry.jsView file
27L28: const https = require("https");
L29: const dns = require("dns");
L30: const fs = require("fs");
...
L116: const _logger = new Logger(
L117: process.env.ANALYTICS_DEBUG ? LogLevel.DEBUG : LogLevel.NONE
L118: );
...
L224: "BUILD_NUMBER",
L225: "GITHUB_ACTIONS",
L226: "GITLAB_CI",
...
L275: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L276: device_app_hash: hashString(process.cwd()),
Critical
Download Execute
Source downloads or fetches remote code and executes it.
lib/telemetry.jsView on unpkg · L27495L496: fork() {
L497: const child = new Scope();
High
•matchType = normalized_sha256
matchedPackage = twork-data-services-invest-box-account@20.8.8
matchedPath = lib/telemetry.js
matchedIdentity = npm:[redacted]:20.8.8
similarity = 1.000
summary = normalized source hash matched finalized malicious source
High
Known Malware Source Similarity
Source file is highly similar to a previously finalized malicious package; route for source-aware review.
lib/telemetry.jsFindings
2 Critical2 High3 Medium3 Low
CriticalDownload Executelib/telemetry.js
CriticalTrigger Reachable Dangerous Capabilitysetup.js
HighChild Processlib/telemetry.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowWeak Cryptolib/telemetry.js
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to claims-get-base-url@35.4.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing claims-get-base-url@35.4.5. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.