registry / Malware / @hanzofc/baileys / 7.2.1

@hanzofc/baileys@7.2.1

A customized fork of WhiskeySockets/Baileys with additional fixes and modifications for WhatsApp automation.

This package appears in our research on the malicious Baileys forks, with how it works, the full package list and what to do if you installed it.

AI Security Review

scanned 4d ago · by lpm-firewall-ai

Source inspection confirms an automatic, publisher-selected account action on connection open. This is concrete behavior that can alter a consumer’s WhatsApp subscriptions without an explicit request.

Static reason

One or more suspicious 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 creates a socket and its WhatsApp connection opens.

Impact

The connected account is subscribed to a newsletter without an explicit caller request.

Mechanism

A connection event handler calls the newsletter-follow operation with a hard-coded newsletter identifier.

Attack narrative

The package’s main entrypoint exports a socket factory whose connection-open handler follows a hard-coded newsletter. The action runs automatically against the connected account and has no caller-selected target or consent guard.

AI rationale

Evidence

package.jsonlib/index.jslib/Socket/index.jslib/Defaults/index.js

Network endpoints1

wss://web.whatsapp.com/ws/chat

Decision evidence

public snapshot

AI called this Malicious at 94.0% confidence as Malware with low false-positive risk.

Evidence for block

The package entrypoint exports the socket factory that contains the automatic follow callback.
On connection open, the callback follows a fixed newsletter JID without caller-selected input.
The follow uses the connected account and runs once per socket.
The default connection targets WhatsApp’s WebSocket service.

Evidence against

Behavioral surface

Source

ChildProcessCryptoFilesystemNetworkShellWebSocket

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 115 file(s), 1.93 MB of source, external domains: acs.whatsapp.com, call.whatsapp.com, graph.whatsapp.com, picsum.photos, raw.githubusercontent.com, wa.me, web.whatsapp.com, www.whatsapp.com

Oversized source lightweight scan

WAProto/index.js4.24 MB file, sampled 256 KB

No sampled risky behavior triggered.

Source & flagged code

10 flagged

package.jsonView file

Lines 18-58json

18 "types": "lib/index.d.ts",

19 "files": [

20 "lib/**/*",

21 "WAProto/**/*",

22 "engine-requirements.js"

23 ],

24 "scripts": {

25 "build:all": "npm run build && npm run build:docs",

26 "build:docs": "typedoc",

27 "build": "tsc -P tsconfig.build.json && tsc-esm-fix --tsconfig=tsconfig.build.json --ext=.js",

28 "changelog:last": "conventional-changelog -p angular -r 2",

29 "changelog:preview": "conventional-changelog -p angular -u",

30 "changelog:update": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0",

31 "example": "tsx ./Example/example.ts",

32 "gen:protobuf": "sh WAProto/GenerateStatics.sh",

33 "format": "prettier --write \"src/**/*.{ts,js,json,md}\"",

34 "lint": "tsc && eslint src --ext .js,.ts",

35 "lint:fix": "npm run format && npm run lint -- --fix",

36 "prepack": "npm run build",

37 "prepare": "npm run build",

38 "preinstall": "node ./engine-requirements.js",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L38

39 "release": "release-it",

40 "test": "node --experimental-vm-modules ./node_modules/.bin/jest --testMatch '**/*.test.ts'",

41 "test:e2e": "NODE_TLS_REJECT_UNAUTHORIZED=0 node --experimental-vm-modules ./node_modules/.bin/jest --runInBand --forceExit --testMatch '**/*.test-e2e.ts'",

42 "update:version": "tsx ./scripts/update-version.ts"

43 },

44 "dependencies": {

45 "@cacheable/node-cache": "^1.4.0",

46 "@hapi/boom": "^9.1.3",

47 "async-mutex": "^0.5.0",

48 "libsignal": "^6.0.0",

49 "lru-cache": "^11.1.0",

50 "music-metadata": "^11.12.3",

51 "p-queue": "^9.0.0",

52 "pino": "^9.6",

53 "protobufjs": "^7.5.6",

54 "whatsapp-rust-bridge": "0.5.4",

55 "ws": "^8.13.0"

56 },

57 "devDependencies": {

58 "@eslint/eslintrc": "^3.3.1",

lib/WABinary/constants.jsView file

Lines 580-620javascript

580 '044',

581 'mms_cat_v1_forward_hot_override_enabled',

582 'user_notice',

583 'ptt_waveform_send',

584 '047',

585 'Asia/Calcutta',

586

lib/Utils/validate-connection.jsView file

Lines 92-132javascript

92 supportBizHostedMsg: true,

93 supportRecentSyncChunkMessageCountTuning: true,

94 supportHostedGroupMsg: true,

95 supportFbidBotChatHistory: true,

WAProto/GenerateStatics.shView file

•path = WAProto/GenerateStatics.sh kind = build_helper sizeBytes = 302 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

WAProto/GenerateStatics.shView on unpkg

WAProto/index.jsView file

•stage = ast_semantic_analysis; reason = ast_path_work_budget_exceeded; limitedFiles = 4

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

WAProto/index.jsView on unpkg

•path = WAProto/index.js kind = oversized_source_file sizeBytes = 4442300 magicHex = [redacted]

Medium

Oversized Source File

Package contains source files above the normal full-analysis size ceiling.

WAProto/index.jsView on unpkg

lib/Utils/messages-media.jsView file

•matchType = normalized_sha256 matchedPackage = @hanzofc/baileys@7.2.0 matchedPath = lib/Utils/messages-media.js matchedIdentity = npm:QGhhbnpvZmMvYmFpbGV5cw:7.2.0 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.

lib/Utils/messages-media.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 443d2b26dafdb34f signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @hanzofc/baileys@7.2.0 matchedPath = lib/Utils/messages-media.js matchedIdentity = npm:QGhhbnpvZmMvYmFpbGV5cw:7.2.0 similarity = 1.000 shingleOverlap = 20 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.

lib/Utils/messages-media.jsView on unpkg

lib/WABinary/constants.d.tsView file

Lines 1-28typescript

1export declare const TAGS: {

2 LIST_EMPTY: number;

3 DICTIONARY_0: number;

4 DICTIONARY_1:

Source & flagged code

10 flagged · loading source

package.jsonView file

•scripts.preinstall = node ./engine-requirements.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

lib/WABinary/constants.jsView file

600patternName = google_api_key severity = high line = 600

High

High Secret

Package contains a high-severity secret pattern.

lib/WABinary/constants.jsView on unpkg · L600

600patternName = google_api_key severity = high line = 600

High

Secret Pattern

Google API key in lib/WABinary/constants.js

lib/WABinary/constants.jsView on unpkg · L600

Findings

7 High4 Medium6 Low

HighInstall Time Lifecycle Scriptspackage.json

HighHigh Secretlib/WABinary/constants.js

HighSemantic Analysis LimitedWAProto/index.js

HighKnown Malware Source Similaritylib/Utils/messages-media.js

HighKnown Malware Source Fingerprint Signaturelib/Utils/messages-media.js

HighSecret Patternlib/WABinary/constants.js

HighSecret Patternlib/WABinary/constants.d.ts

MediumNetwork

MediumShips Build HelperWAProto/GenerateStatics.sh

MediumOversized Source FileWAProto/index.js

MediumStructural Risk Force Deep Review

LowNon Install Lifecycle Scripts

LowScripts Present

Affected versions and remediation

This report applies to @hanzofc/baileys@7.2.1.

See all versions of @hanzofc/baileys for other recorded verdicts.

Avoid installing @hanzofc/baileys@7.2.1. 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: 2026-10-18 22:19:01.321Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Related packages

Other malware packages

Behavioral surface

Source & flagged code

Related packages

Other malware packages