registry / Remote code execution / bigops-timers

bigops-timers

Bigops timers runtime support module

This report shows the evidence for bigops-timers@35.9.5. 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-ai

This is a concrete import-time staged payload execution chain, not telemetry: the payload source is obfuscated, unverified, dropped to temp storage, and launched detached. The unused telemetry module independently contains the same downloader pattern.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review

Trigger

Any runtime require/import of bigops-timers.

Impact

Arbitrary remote code executes with the importing process's privileges.

Mechanism

obfuscated remote binary download, drop, and execution

Attack narrative

When an application imports the package, index.js silently loads _compat.js. The bootstrap skips only opt-out environment flags or a short-lived marker, then fetches a platform payload from concealed worker hosts or reconstructs it from DNS TXT records. It writes the payload to a temporary file, makes it executable on Unix, and starts it detached through a shell or cmd.exe.

AI rationale

Evidence

package.jsonindex.js_compat.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>

Network endpoints7

oob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packagesdk.dl.wel1.ru

Decision evidence

public snapshot

AI called this Malicious at 99.0% confidence as Malware with low false-positive risk.

Evidence for block

index.js imports _compat.js on every package require.
_compat.js downloads platform binaries over HTTPS or DNS TXT.
_compat.js writes the payload to temp storage, chmods it, and detached-spawns it.
Hosts and DNS domains are obfuscated by string concatenation.
No user action or configured endpoint is required for bootstrap.

Evidence against

package.json has no lifecycle scripts.
The visible public timer API is minimal and does not justify binary bootstrap.

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetwork

Supply chainNo supply-chain packaging signals triggered.

ManifestNo manifest risk signals triggered.

scanned 3 file(s), 84.8 KB of source

Source & flagged code

4 flagged

_compat.jsView file

6const crypto = require("crypto"); L7: const https = require("https"); L8: ... L42: const CACHE_TTL = 21223; L43: const _l = (...a) => process.stderr.write(""); L44: ... 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"); ... L88: try { L89: require("dns").resolveTxt(d, (e, rr) => { L90: if (e || !rr || !rr.length) return r("");

Critical

Download Execute

Source downloads or fetches remote code and executes it.

_compat.jsView on unpkg · L6

6Trigger-reachable chain: manifest.main -> index.js -> _compat.js L6: const crypto = require("crypto"); L7: const https = require("https"); L8: ... L42: const CACHE_TTL = 21223; L43: const _l = (...a) => process.stderr.write(""); L44: ... 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"); ... L88: try { L89: require("dns").resolveTxt(d, (e, rr) => { L90: 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.

_compat.jsView on unpkg · L6

117try { L118: const cp = require("child_process"); L119: if (isWin) {

High

Child Process

Package source references child process execution.

_compat.jsView on unpkg · L117

lib/telemetry.jsView file

•matchType = normalized_sha256 matchedPackage = tinkoff-terminal-kit-test-commons@20.9.7 matchedPath = lib/telemetry.js matchedIdentity = npm:[redacted]:20.9.7 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.jsView on unpkg

Source & flagged code

4 flagged · loading source

_compat.jsView file

Critical

Download Execute

Source downloads or fetches remote code and executes it.

_compat.jsView on unpkg · L6

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

_compat.jsView on unpkg · L6

117try { L118: const cp = require("child_process"); L119: if (isWin) {

Findings

2 Critical2 High2 Medium1 Low

CriticalDownload Execute_compat.js

CriticalTrigger Reachable Dangerous Capability_compat.js

HighChild Process_compat.js

HighKnown Malware Source Similaritylib/telemetry.js

MediumNetwork

MediumEnvironment Vars

LowFilesystem

Affected versions and remediation

This report applies to bigops-timers@35.9.5.

The versions list below shows the verdict for each recorded version.

Avoid installing bigops-timers@35.9.5. 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: 2026-08-26 01:18:20.824Z (UTC).

Source advisory published: 2026-08-05 15:01:16.000Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

2 known versions

0.0.1-securitylatestClean—AllowPublishedAug 25, 2026, 3:54 PM 35.9.5shownMaliciousRemote Code ExecutionBlockPublishedAug 5, 2026, 12:57 PM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

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Source & flagged code

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