Security Warning: Historically Flagged as Malware

This extension is historically labeled as malware, but the current version analysis does not yet confirm severe malicious findings.Extension: DoppelBrain

HIGH RISKStill available - needs review

DoppelBrain

ID: ckojmgofilpgbmjjhkpedmdfoihlfgfn

Supported Languages

🇺🇸English

Extension Info & Metadata

Status

Active

Version

1.2.0

Size

0.38 MB

Rating

5.0/5

Reviews

Users

Type

Extension

Updated

Jul 28, 2026

Publisher Contextual Analysis

Author: https://doppelbrain.aiView Profile
Privacy: Privacy Policy
MX records exist: Yes
Domain exists: Yes
Is disposable: No
Is role-based: No
Mailbox exists: Yes
Website: Visit

Total Extensions

Active

Obsolete

Listed

Unlisted

Total Users

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DoppelBrain remembers what you read and turns it into a personal memory you can search and chat with.

Your AI assistant that has all the context. Know where you have been and where you will want to go.

User Growth

Showing data from May 06, 2025 to Aug 02, 2026

Versions

+3166.67%(+95 users)

Compared to 3 months ago

9 versions released in this period

Rating Count

Total: 2 ratings

Average Rating

Current: 5.00 / 5.0+5.00

Extracted Data

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By severity

Critical1

High3

Medium1

Low1

Versions scanned

Showing 1 of 9 scanned versions with more than one unique finding. Counts are unique findings that include each version.

Extension Version	Code Review Findings
0.8.0 Code review	6

Extension Version	Code Review Findings
0.8.0	6

Files with findings

3 distinct paths — top paths by unique finding count:

content.js3
background.js2
assets/apiClient-Bm5iLClD.js1

S.No.	Category	Severity	File	Summary	Found in Version
1	Data Exfiltration	critical	background.js (line 192)	Whenever any tab loads a URL ending in .pdf, the background fetches the PDF content (including private/intranet PDFs reachable via the user's browser context via <all_urls>), uploads it to the extension operator's bac…	0.8.0
2	Data Exfiltration	high	content.js (line 642)	Every 2 minutes the content script posts the accumulated page-content/URL buffer to the background service worker, which forwards it to https://clew-hqi3.onrender.com. Continuous periodic exfiltration of browsing cont…	0.8.0
3	Obfuscation	high	assets/apiClient-Bm5iLClD.js (line 41)	The exfiltration payload (collected browsing content) is AES-256-GCM encrypted using a hardcoded 32-byte key embedded in the extension ('27a4c3a71927cdad9a8773b625b9adfe95104a53d39f3e12741b4cd8ba64df45') before being …	0.8.0
4	Unauthorized Data Collection	high	content.js (line 536)	Content script runs on <all_urls> and periodically (every 2s) extracts visible text content (up to 100k chars) plus H1 headings, URL, and title from every page the user visits, buffers them into 'pageActivities' stora…	0.8.0
5	Tracking	medium	background.js (line 256)	Every hostname the user navigates to is sent (as a path-segment, unencrypted) to https://blacklist-generator.onrender.com/check/<hostname>. This is effectively a browsing-history side-channel: the operator (or any net…	0.8.0
6	Tracking	low	content.js (line 718)	The content script broadcasts a 'DOPPELBRAIN_INSTALLED' postMessage with the extension version to every page (target '*') on every site. This allows arbitrary web pages to fingerprint that the extension is installed a…	0.8.0

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URLs

IPv4

IPv6

URLs

View the external URLs this extension communicates with to understand its network activity and data interactions.

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www.w3.org	/2000/svg	http://www.w3.org/2000/svg
www.doppelbrain.ai	-	https://www.doppelbrain.ai/
github.com	/syntax-tree/hast-util-to-jsx-runtime	https://github.com/syntax-tree/hast-util-to-jsx-runtime
github.com	/remarkjs/react-markdown/blob/main/changelog.md	https://github.com/remarkjs/react-markdown/blob/main/changelog.md
github.com	/highlightjs/highlight.js/issues/2277%60	https://github.com/highlightjs/highlight.js/issues/2277`
github.com	/highlightjs/highlight.js/wiki/security	https://github.com/highlightjs/highlight.js/wiki/security
clew-pdf-viewer.vercel.app	/web/viewer.html	https://clew-pdf-viewer.vercel.app/web/viewer.html
www.doppelbrain.ai	-	https://www.doppelbrain.ai
doppelbrain.ai	-	https://doppelbrain.ai
www.doppelbrain.ai	/api/blocklist/check	https://www.doppelbrain.ai/api/blocklist/check

Showing 1 to 10 of 20 rows

Rows per page:

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0.0.0.0	IPv4	-
127.0.0.1	IPv4	-

5.0 out of 5 · 2 most recent reviews

Text reviews

Positive

Negative

Idea quite neat! I always wonder what would it look like to connect my data sources to the models and have control over what I share. Instead of relying on their knowledge about me.

Vitalii Ratushnyi·21 Mar 2026

This wonderful extension helps me find all my information in my history, making it easier to search (no need to dig through my browser history and search manually). Suggestions suggest next steps, which is very useful and convenient – I can explore each topic in depth and without much effort, because all available options are shown on the page in separate cards, each topic comes with an addition and suggestion. Analysis of my actions is also available – the app itself can advise how to improve my work and make my daily life more comfortable, without wasting time searching for information. Absolutely love this extension! It’s fast, efficient, and incredibly helpful. I noticed an improvement in my productivity right away. Huge thanks to the developers for such a great tool!

Tetiana Kosenko·18 Mar 2026

Version History

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Code Diff

Compare extension code between any two versions.

0 changed files detected

No comparable text files found between these versions.

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Browse and explore files within this extension package

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Security Warning: Historically Flagged as Malware

DoppelBrain

Supported Languages

Extension Info & Metadata

Publisher Contextual Analysis

Chrome Web Store Metadata

About this extension

Analytics & Metrics

User Growth

Rating Count

Average Rating

Static Code Security Analysis

Extracted Data

Code Review Findings Summary Across 9 Versions6

Versions scanned

Files with findings

Extracted Indicators (URLs and IPs)

URLs

Contextual Analysis

User Reviews

Version History

Version-to-Version Code Diff

Code Diff

Extension Files

User Reviews

User Growth

Rating Count

Average Rating