registry / Remote code execution / boxy-micro-story
boxy-micro-story
Boxy micro story runtime support module
This report shows the evidence for boxy-micro-story@35.4.9, 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 concrete import-time remote payload execution, not package-aligned telemetry. The absence of a lifecycle hook does not mitigate the automatic require-time execution.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
require('boxy-micro-story') / loading index.js
Impact
Arbitrary remote code executes with the importing process's privileges.
Mechanism
remote binary retrieval, temporary drop, and detached shell execution
Attack narrative
index.js suppresses errors while importing _platform.js. On import, it records a temporary marker, retrieves a platform-specific binary from obfuscated HTTPS mirrors or DNS TXT records, writes it under a temporary cache-like name, makes it executable on Unix, and launches it detached through a shell or cmd.exe.
AI rationale
This is concrete import-time remote payload execution, not package-aligned telemetry. The absence of a lifecycle hook does not mitigate the automatic require-time execution.
Evidence
index.js_platform.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints7
oob-worker.cf99-9b3.workers.devoob-worker.cf102-baf.workers.devoob-worker.cf101-adf.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 _platform.js at module load.
- _platform.js downloads platform binaries over HTTPS.
- _platform.js falls back to DNS TXT payload retrieval.
- Downloaded bytes are written, chmodded, then spawned detached.
- Payload sources are obfuscated across Workers and .ru hosts.
Evidence against
- package.json has no lifecycle scripts.
- Exported BoxyMicroStory API is otherwise minimal.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
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");
...
L117: const _logger = new Logger(
L118: process.env.ANALYTICS_DEBUG ? LogLevel.DEBUG : LogLevel.NONE
L119: );
...
L225: "BUILD_NUMBER",
L226: "GITHUB_ACTIONS",
L227: "GITLAB_CI",
...
L276: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L277: 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 = tramvai-module-feature-toggle@20.5.3
matchedPath = lib/telemetry.js
matchedIdentity = npm:[redacted]:20.5.3
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 unpkgFindings
2 Critical2 High2 Medium2 Low
CriticalDownload Executelib/telemetry.js
CriticalTrigger Reachable Dangerous Capability_platform.js
HighChild Processlib/telemetry.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowWeak Cryptolib/telemetry.js
LowFilesystem
Affected versions and remediation
This report applies to boxy-micro-story@35.4.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing boxy-micro-story@35.4.9. 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.