Flagged in the threat library: WaSteal

Our analysis confirmed the behaviour described in the threat library entry. Do not install it. Read the analysis and indicators →

Also reported by malext.io, reddit.com

Chrome Web Store Verified

KASAPP

by [email protected] · 6 users · 5.0 rating
e4859cd9-a983-5933-906d-c2db53d9114b | v7.4.3.87
65/ 100
MEDIUM risk
No change since v7.4.3.85
Threat verdict
Do not install

Confirmed member of a tracked malicious supply-chain campaign.

Analysis record

Analysed
5 days ago
Version
v7.4.3.87
Artifact
SHA256 838…136
Source
Findings (non-IoC)

Evidence ledger

Ranked by severity · findings with a source location link to the code viewer

25 detail rows

Publisher Evidence

Limited evidence

[email protected]

Publisher identity, store signals, distribution reach, and warning signals used for context. Treat this as supporting evidence, not a clean bill of health.

Chrome does not expose the same publisher verification data as IDE stores, so this score is deliberately conservative.

51
Noisy-finding weight
x1.00
Publisher domain
extensao.store
Observed
Store verification signal
Limited signal
Limited
Extension portfolio
174
Portfolio

11 evidence rows available.

Finding Categories

2
Obfuscation
22
Network

Requested Permissions

5 permissions
tabs
Medium
unlimitedStorage
Low
storage
Low
alarms
Low
https://web.whatsapp.com/*
Low

AI Security Report

AI Security Review

Evidence context: threat category none; evidence quality moderate.

KASAPP describes itself as a CRM that connects to WhatsApp Web through a Chrome extension. The package we scanned holds 25 findings, all medium severity, and none of them are malware signatures, hardcoded indicators of compromise, exposed secrets or flagged dependencies. Two families account for everything: 22 network detections and 2 obfuscation detections.

The network detections are the three transports a chat-sync product needs. NET-SOCKET_IO fires at content/assets/js/v_7_4_3_87_0a650f0a-57a6-4989-860e-3a9d8748d28912.js:15 and three sibling files. NET-FETCH fires across the same content/assets/js directory, including v_7_4_3_87_...261.js:1 and v_7_4_3_87_...262.js:1, and again at background.js:137. NET-JQUERY_AJAX fires at v_7_4_3_87_...923.js:1 and :13. Socket.IO, fetch and jQuery AJAX are the plumbing for a sidebar that stays in step with a server. The filenames themselves, with a version prefix and a long hex hash, come out of a build pipeline, so repeated detections of the same three patterns across 15 generated files are expected.

The two obfuscation detections are weaker still. OBFUSCATION-LARGE_BASE64 sits in funnil/assets/js/9cf42769-2ad5-4714-8614-9a2b4c455349.CgnacD38.js:1, a hashed chunk inside a funnel folder. Large base64 blocks in bundled assets are inlined images, fonts and sprites. OBFUSCATION-FUNCTION_INDIRECT at content/assets/js/v_7_4_3_87_...260.js:1 is the indirect-call shape minifiers emit to save bytes. A build chunk is not obfuscation, and neither file carries a co-located malware signature.

One manifest-level finding appears in the scan summary, but its detail was not included in this data, so I cannot say what it flagged. That is the one gap in the evidence.

The strongest counterargument: a WhatsApp CRM is a high-privilege product. Its content script shares a page with a logged-in WhatsApp Web session, so it can read conversations, and the publisher is an email address at extensao.store attached to an extension with six users. That combination deserves scrutiny from anyone sending customer messages through it. What the code shows is a client talking to a back end with no unknown host recorded anywhere: zero IoC entries, zero malware matches, no credential-targeting logic, no cookie or token extraction, and no hardcoded suspicious domain. The risk sits with who receives the data. That is a question about the company; these files contain no hidden behavior.

If this extension were exfiltrating messages, the scan would show a hardcoded endpoint or an IoC entry pointing at a non-standard host. Neither exists here. What remains is the shape of a normal web app stored in a content/assets/js bundle. The endpoints background.js:137 calls, and runtime capture of the Socket.IO handshake, would settle where chat data goes.

Key Reasons

  • No malware signatures, IoCs, secrets or suspicious domains anywhere in the scan; all 25 findings are medium-severity network and obfuscation detections.
  • Network findings are Socket.IO, fetch and jQuery AJAX transports in content/assets/js build files and background.js:137, which is what a WhatsApp Web CRM requires.
  • OBFUSCATION-LARGE_BASE64 in funnil/assets/js/9cf42769-2ad5-4714-8614-9a2b4c455349.CgnacD38.js:1 is inlined asset data inside a hashed build chunk.
  • OBFUSCATION-FUNCTION_INDIRECT in content/assets/js/v_7_4_3_87_...260.js:1 matches standard minifier output.
  • One manifest-level finding is recorded but undetailed, and publisher identity ([email protected], 6 users) gives limited assurance.

False Positive Considerations

  • Version-stamped and hashed build files under content/assets/js trigger generic network rules repeatedly
  • Base64-inlined assets in the funnil/assets/js chunk read as obfuscation
  • Minifier indirect-call pattern classified as obfuscation
  • Socket.IO, fetch and AJAX calls are the extension's own sync mechanism, not exfiltration

Reviewed 2026-10-14; recommended action: monitor; model confidence 73%.

Chrome version history

Risk trend by version

21 analyzed versions. Each point is the latest successful scan for that version; failed zero-score scans are hidden. Dates are based on first seen by risky plugins.

Selected
65
Change since first
+7
Change from previous
No change
Versions:
First analyzed version
7.4.3.7
Feb 8, 2026
Risk range
53 to 73
Across analyzed versions
Latest analyzed version
7.4.3.87
Oct 11, 2026
Selected version
medium
Version
v7.4.3.87
5 days ago
Risk score
65
Findings
25
Change vs previous
No change

Pick any point on the chart to explore that version's code below.

About This Extension

Características do KASAPP: ✔ Envio em massa para contatos ou importados via CSV – Envie mensagens para múltiplos contatos de maneira rápida e prática, sem complicação. ✔ Criação de Abas Personalizadas – Organize seus contatos de forma eficiente e encontre facilmente os mais importantes. ✔ Visão Kanban dos Contatos – Tenha uma visão clara e organizada dos seus contatos com a opção de arrastar e soltar. ✔ Envio de Mensagens para Números Não Salvos – Envie mensagens para qualquer número, mesmo que não esteja na sua agenda, sem precisar adicionar à lista de contatos. ✔ Criação de Notas Personalizadas – Anote informações importantes para cada contato diretamente no perfil deles. ✔ Lembretes para Contatos – Nunca se esqueça de retornar uma ligação ou seguir com um compromisso. Crie lembretes específicos para cada contato. ✔ Agendamento de Reuniões no Google Agenda – Agende compromissos diretamente no seu Google Agenda com facilidade, sem precisar sair da plataforma. ✔ Lembretes Simples e Notificações – Crie lembretes rápidos e receba notificações diretamente no seu dispositivo. ✔ Banco de Respostas Rápidas – Tenha respostas pré-configuradas e envie com um clique para otimizar seu tempo. ✔ Exportação de Contatos do Wpp – Exporte seus contatos diretamente do Wpp ou de grupos de Wpp para facilitar a organização. ✔ Suporte Multilíngue – Use a plataforma em seu idioma nativo: português, espanhol ou inglês, garantindo facilidade de uso. ✔ Assistente AI — Sua inteligência artificial pronta para ajudar! Otimize seu tempo com um assistente inteligente, rápido e sempre disponível. Responda dúvidas, automatize tarefas, gere textos, traduções e muito mais com o poder da IA. Ideal para profissionais, equipes e quem busca praticidade no dia a dia. KASAPP é uma ferramenta independente, sem qualquer vínculo com o WhatsApp ou a empresa responsável. Funciona exclusivamente através da Chrome Web Store e opera de maneira autônoma. Não somos uma ferramenta oficial do WhatsApp, mas oferecemos funcionalidades inovadoras para quem precisa de mais praticidade na gestão de contatos e mensagens.

Frequently Asked Questions