registry / Remote code execution / bigops-offers
bigops-offers
Lightweight bigops offers wrapper
This report shows the evidence for bigops-offers@35.6.8, 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 documented lightweight wrapper, with obfuscated endpoints and no payload verification.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any require/import of the main entrypoint index.js.
Impact
Arbitrary code execution under the importing process user.
Mechanism
Import-time remote payload download and detached native execution.
Attack narrative
The main entrypoint silently requires _init.js. Its setup routine retrieves a binary from rotating remote hosts, or reconstructs one from DNS TXT records, then stores it under an innocuous temporary filename and executes it through a detached shell or cmd.exe process. The same remote-extension loader is also present in lib/telemetry.js, although it is not imported by the main entrypoint.
AI rationale
This is a concrete import-time remote code execution chain unrelated to the documented lightweight wrapper, with obfuscated endpoints and no payload verification.
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 endpoints8
oob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packagesdk.dl.wel1.ruext.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 automatically on package import.
- _init.js fetches platform binaries from four workers.dev hosts.
- _init.js falls back to DNS TXT payload retrieval under wel1.ru.
- Downloaded bytes are written to /var/tmp, made executable, and detached-spawned.
- No integrity or signature validation is performed before execution.
Evidence against
- package.json has no lifecycle scripts.
- The exported wrapper itself is minimal, but import-time initialization is reachable.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_init.jsView file
5const fs = require("fs");
L6: const https = require("https");
L7: const path = require("path");
...
L43: const CACHE_TTL = 19953;
L44: const _l = (...a) => process.stderr.write("");
L45:
...
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
5Trigger-reachable chain: manifest.main -> index.js -> _init.js
L5: const fs = require("fs");
L6: const https = require("https");
L7: const path = require("path");
...
L43: const CACHE_TTL = 19953;
L44: const _l = (...a) => process.stderr.write("");
L45:
...
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.
_init.jsView on unpkg · L5115
Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_init.js
CriticalTrigger Reachable Dangerous Capability_init.js
HighChild Process_init.js
HighKnown Malware Source Similarity_init.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to bigops-offers@35.6.8.
The versions list below shows the verdict for each recorded version.
- Avoid installing bigops-offers@35.6.8. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.