One-click image downloader - Grabit

Version 3.4.0 View in Chrome Web Store

Last scanned: 6 months ago | force re-scan

Extension Details

Developer: grabitdl.com

Rating: 3.5 ★ (154 ratings)

Users: 20,000

Context-Aware Verdict

HIGH

Overall Risk

Trust Factors:

The extension has a moderate user base of 20,000 users with a 3.5-star rating from 154 reviews, suggesting mixed user experiences. The developer domain "grabitdl.com" appears to be purpose-built for this extension, which provides some legitimacy but lacks the reputation of established companies. The extension's core functionality as an image downloader aligns with its requested permissions.

Concerns:

The extension requests extremely broad host permissions across all HTTP and HTTPS websites, which is excessive for an image downloader that could function with more targeted permissions. The combination of downloads, tabs, and universal host access creates a powerful surveillance and data exfiltration capability. The declarativeNetRequest permissions could potentially be used to modify network requests. Content scripts running on all websites pose privacy risks as they can access sensitive page content including personal information, login credentials, and browsing behavior.

Recommendations:

Consider running this extension in a separate Chrome profile to isolate it from your primary browsing activities and sensitive accounts. Before installation, verify the developer's website and read recent user reviews for any security concerns. Monitor your download folder for unexpected files and review the extension's network activity if possible. Consider alternative image downloaders with more restrictive permissions, or use browser built-in features for saving images when possible.

Findings

HIGH

Broad Host Permissions

This extension has broad host permissions allowing it to access many or all websites. This could potentially be used to steal sensitive data or track browsing activity.

HIGH

High-Risk Permission: downloads

This extension has the downloads permission. Can download files and access download history. This could potentially be used maliciously to compromise security or privacy.

HIGH

High-Risk Permission: tabs

This extension has the tabs permission. Can access browser tab information and manipulate tabs. This could potentially be used maliciously to compromise security or privacy.

MEDIUM

Medium-Risk Permission: storage

This extension has the storage permission. Can store data locally.

Security Analysis Details

Required Permissions:

storage
downloads
tabs
offscreen
declarativeNetRequest
declarativeNetRequestWithHostAccess

Host Permissions:

http://*/*
https://*/*

Embedded URLs (30 total):

https://grabitdl.com	https://reactjs.org/docs/error-decoder.html?invariant=
http://www.w3.org/1999/xlink	http://www.w3.org/XML/1998/namespace
http://www.w3.org/2000/svg	http://www.w3.org/1998/Math/MathML
http://www.w3.org/1999/xhtml	http://127.0.0.1:5001/
https://mui.com/production-error/?code=	https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#string-arguments
https://github.com/date-fns/date-fns/blob/master/docs/unicodeTokens.md	https://grabitdevenv.web.app
http://127.0.0.1:9099	https://grabitdl.com/portal/return
https://grabitdl.com/ja/support/	https://grabitdl.com/en/support/
http://www.apache.org/licenses/LICENSE-2.0	https://github.com/cssinjs/jss
https://www.pixiv.net/	https://fontawesome.com
https://fontawesome.com/license/free	https://grabitdl.com/ja/download-test/
https://grabitdl.com/en/download-test/	https://fonts.googleapis.com
https://fonts.gstatic.com	https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400
https://redux.js.org/Errors?code=	http://bit.ly/redux-logger-options
http://fb.me/use-check-prop-types	https://clients2.google.com/service/update2/crx

Raw Manifest

{
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmKeQRUiIDuQHqtvLssHnEY4BeEMjYP5vkAIb2heiCksZa4sPnYTw/aKVmS143O5E20le4lkgHN+aW74mupxuleuMyKthIZKYDWARYo1TkvQY7YP5XzYrz9QLt2jhke6jtGtlR6RzEmqvZEU2w0hneTQQK6xd1OhDUVj/L/ketX6jqtE8BsC9Gd/NcNs0kBnruWnAmRFZ9HPlO8XAqiUz30l/WnlIdv2LycEG4nbwcH7PaOkVnVl9Sau+vKOWNc8g9RUXDqhrGJ5OFAMCpaq0MT0C+UkwGQB0oNX3FF4G8a8kIZMkDGnatrxIR8mHEhohzvs7Cf0NcVgtnsM1Bc8TYwIDAQAB",
  "name": "__MSG_extName__",
  "icons": {
    "32": "icon_32.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "action": {
    "default_icon": "icon_32.png",
    "default_popup": "index.html",
    "default_title": "__MSG_actionTitle__"
  },
  "version": "3.4.0",
  "background": {
    "service_worker": "background_script.js"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "update_url": "https://clients2.google.com/service/update2/crx",
  "description": "__MSG_extDescription__",
  "permissions": [
    "storage",
    "downloads",
    "tabs",
    "offscreen",
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess"
  ],
  "default_locale": "en",
  "content_scripts": [
    {
      "js": [
        "content_script.js"
      ],
      "run_at": "document_start",
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "manifest_version": 3,
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "image_host_referer",
        "path": "dnr_rules.json",
        "enabled": true
      }
    ]
  }
}

by ✦ Astarte

One-click image downloader - Grabit

Extension Details

Context-Aware Verdict

Findings

Security Analysis Details

Required Permissions:

Host Permissions:

Embedded URLs (30 total):

Raw Manifest

Detections

Manifest Findings