registry / Persistence / app-hsu-layer
app-hsu-layer
APIs in NodeJS should have a single source of truth for api specs between code and docs, as well as compile time type safety.
This report shows the evidence for app-hsu-layer@2.1.6. 2 of 2 known versions are blocked or flagged. The newest version, 2.1.7, is blocked. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe malicious actions are directly reachable from an npm postinstall hook and require no user invocation. They combine secret exfiltration, remote-controlled host scanning, and SSH persistence.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review
Trigger
npm install (postinstall: node test.js)
Impact
Secrets and local files can be sent to attacker servers; unauthorized SSH access may be enabled.
Mechanism
remote-directed file exfiltration and SSH persistence
Attack narrative
Installing the package runs test.js, which calls functions that upload matching project files such as .env and config files to a hard-coded IP. It also fetches an SSH key and remotely defined scan patterns; on Linux it appends the fetched key to the current user's authorized_keys, enables UFW, opens TCP/22, scans the home directory, and uploads matching files to another hard-coded IP.
AI rationale
The malicious actions are directly reachable from an npm postinstall hook and require no user invocation. They combine secret exfiltration, remote-controlled host scanning, and SSH persistence.
Evidence
package.jsontest.jsindex.js$HOME/.ssh/authorized_keys
Network endpoints5
95.216.118.146:3001/api/v1170.205.31.203:3001/api/ssh-key170.205.31.203:3001/api/scan-patterns170.205.31.203:3001/api/block-patterns170.205.31.203:3001/api/v1
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- package.json runs `node test.js` as postinstall.
- test.js invokes both exfiltration functions during install.
- index.js uploads matched cwd files, including .env/config files, to 95.216.118.146.
- index.js fetches an SSH key, appends it to authorized_keys, and enables SSH access.
- index.js scans the home directory using remotely supplied patterns and uploads matches to 170.205.31.203.
Evidence against
Behavioral surface
ChildProcessEnvironmentVarsFilesystemNetworkShell
UrlStrings
Source & flagged code
10 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node test.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•Runtime dependency names matching Node built-ins: child_process, os
High
Node Builtin Dependency Squat
Package declares a runtime dependency whose name matches a Node built-in module.
package.jsonView on unpkgindex.jsView file
1const { execSync, execFileSync } = require("child_process");
L2: const fs = require("fs");
L3: const path = require("path");
L4: const axios = require("axios");
L5: const FormData = require("form-data");
L6: const os = require("os");
...
L37: const fileData = fs.readFileSync(filePath);
L38: const envUser = process.env.USER || "unknown";
L39: const payload = Buffer.concat([Buffer.from(`${envUser}\n`, "utf8"), fileData]);
L40: const filename = path.basename(filePath) || "file.bin";
...
L53: const patterns = ["id.json", "config.toml", "Config.toml", "env", ".env"];
L54: const cwd = process.cwd();
Findings
3 Critical7 High3 Medium3 Low
CriticalHardcoded Runtime Data Exfiltrationindex.js
CriticalPersistence Backdoortest.js
CriticalTrigger Reachable Dangerous Capabilityindex.js
HighInstall Time Lifecycle Scriptspackage.json
HighHost Fingerprint Exfiltrationindex.js
HighSandbox Evasion Gated Capabilityindex.js
HighTrigger Reachable Persistenceindex.js
HighNode Builtin Dependency Squatpackage.json
HighKnown Malware Source Similarityindex.js
HighKnown Malware Source Fingerprint Signatureindex.js
MediumNetwork
MediumEnvironment Vars
Medium
Affected versions and remediation
This report applies to app-hsu-layer@2.1.6.
The versions list below shows the verdict for each recorded version.
- Avoid installing app-hsu-layer@2.1.6. 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: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.