Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Biz Sale Chat & CRM [data-theft] + malext.io malicious_extension_sentry (+2.5, capped).
• WhatsApp impersonation: brand_mention confirms is_impersonation=true; dev is gmail user with no verified identity.
• Free-webmail developer (pietrogabrielg20@gmail.com) with generic dev name 'ext.user003'; no business website.
• Content script on whatsapp.com can read/modify private messages; installs onInstalled redirect to web.whatsapp.com.
• No CSP (MV3 default strict but csp_present=false declared) with innerHTML DOM-XSS sink in vendor bundle.

Evidence

• brand_impersonation store brand_mention: WhatsApp mentioned, confirmed_owner=false, is_impersonation=true; developer is gmail user.
• free_webmail_developer store Developer email pietrogabrielg20@gmail.com; developer_name 'ext.user003'; no verified business.
• install_url_hijack manifest install_url_hijack=true; onInstalled opens https://web.whatsapp.com (first-party but still hijack pattern).
• content_script_sensitive_site manifest Content script injected into https://web.whatsapp.com/* — can access chat content and contacts.
• dom_xss_sink crx innerHTML assignment from variable in vendor.BaH-a-x7.js; no CSP to mitigate DOM-XSS.
• privacy_policy_third_party api Policy at opt-api.com: scope_extension=true, data_collection=true, third_party_sharing=true, retention=true.
• js_external_hosts crx 5 external JS hosts: hc-stt.hiperchat.com.br, locize.com, reactjs.org, web.whatsapp.com, www.i18next.com.
• low_install_count store Only 9 installs; ultra-low reach but unverified identity increases per-user risk.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Biz Sale Chat & CRM [data-theft] + malext.io malicious_extension_sentry; score 3.18 -> 5.68 (+2.5 cap 2.5).

Permissions Breakdown

• unlimitedStorage low Allows large local data storage; no direct user-data exfil risk alone.
• storage low Standard local key-value storage; low risk.
• tabs medium Can read tab URLs and titles; moderate privacy surface.
• alarms low Schedules background tasks; low risk.
• content_scripts: https://web.whatsapp.com/* medium Injects JS into WhatsApp Web; can read/modify messages and contacts.

Pillar Scores

Bookkeeping