registry / Remote code execution / claims-to-iso-string-with-timezone
claims-to-iso-string-with-timezone
Internal claims to iso string with timezone module for platform services
This report shows the evidence for claims-to-iso-string-with-timezone@35.7.2, 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 package's documented claims-conversion API does not require a covert native downloader or detached payload execution. The executable payload is remote-controlled and runs automatically at import time.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Runtime require/import of the package entrypoint.
Impact
Arbitrary remote code execution under the importing user's privileges.
Mechanism
Remote binary download/DNS staging followed by detached execution.
Attack narrative
The public entrypoint suppresses errors while importing _init.js. Its immediately invoked bootstrap fetches an opaque platform payload from concealed HTTPS mirrors or reconstructs it from DNS TXT records, saves it in a temp directory, grants execute permission on Unix, and launches it detached through a shell or cmd.exe. This is unconsented remote code execution on ordinary package import.
AI rationale
The package's documented claims-conversion API does not require a covert native downloader or detached payload execution. The executable payload is remote-controlled and runs automatically at import time.
Evidence
package.jsonindex.js_init.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packagesdk.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 _init.js during normal package import.
- _init.js downloads platform-specific bytes from rotating workers.dev hosts.
- _init.js can retrieve a base64 payload via DNS TXT records.
- _init.js writes the payload to /var/tmp or Windows Temp, marks it executable, and spawns it detached.
- Remote payload hosts and DNS domains are concealed by fragmented strings.
Evidence against
- package.json has no lifecycle scripts.
- No AI-agent configuration or credential-file access was found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
3 flagged · loading source_init.jsView file
5const fs = require("fs");
L6: const https = require("https");
L7: const path = require("path");
...
L45: const COOLDOWN = 22409;
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");
...
L90: try {
L91: require("dns").resolveTxt(d, (e, rr) => {
L92: if (e || !rr || !rr.length) return r("");
Critical
5Trigger-reachable chain: manifest.main -> index.js -> _init.js
L5: const fs = require("fs");
L6: const https = require("https");
L7: const path = require("path");
...
L45: const COOLDOWN = 22409;
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");
...
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.
_init.jsView on unpkg · L5Findings
2 Critical1 High2 Medium1 Low
CriticalDownload Execute_init.js
CriticalTrigger Reachable Dangerous Capability_init.js
HighChild Process_init.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to claims-to-iso-string-with-timezone@35.7.2.
The versions list below shows the verdict for each recorded version.
- Avoid installing claims-to-iso-string-with-timezone@35.7.2. 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.