Security Alert: Confirmed Malware

This extension was removed from the Chrome Web Store as malware. Do not install it.Extension: LinkDownloader

CRITICAL RISKRemoved from Chrome Web Store

LinkDownloader

ID: bfllnidboadchhjlofjkanmgdmefljfk

Could be malicious

Supported Languages

🇺🇸US English

Extension Info & Metadata

Status

Removed

Version

Size

0.01 MB

Rating

1.0/5

Reviews

Users

4,220

Type

Extension

Updated

Dec 7, 2022

Publisher Contextual Analysis

Author: sharonbaum.mrktView Profile
MX records exist: Yes
Domain exists: Yes
Is disposable: No
Is role-based: No
Mailbox exists: Yes

Total Extensions

Active

Obsolete

Listed

Unlisted

Total Users

4,220

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Grouping all website pages links to one place!

This extension Grouping all user's website pages links to one place.

User Growth

Showing data from Dec 08, 2022 to Jan 10, 2023

Versions

No change in user count

Compared to 1 month ago

1 version released in this period

Rating Count

Total: 1 ratings

Average Rating

Current: 1.00 / 5.0+1.00

Extracted Data

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By severity

Critical6

High3

Medium1

Low0

Versions scanned

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

Extension Version	Code Review Findings
1 Code review	10

Extension Version	Code Review Findings
1	10

Files with findings

2 distinct paths — top paths by unique finding count:

background.js5
content.js5

S.No.	Category	Severity	File	Summary	Found in Version
1	Data Exfiltration	critical	background.js (line 638)	The `save()` function sends a heartbeat to `https://aethemselveb.info/hb?ext=LinkDownloader&ver=1&dd=<user_id>&go=1`, embedding the server-assigned user identifier in every request. The server's response (an encrypted…	1
2	Data Exfiltration	critical	content.js (line 513)	After AES decryption of the C2 payload, if the decrypted result contains a search query (`a`), the code builds a redirect URL `https://aethemselveb.info/search?ext=LinkDownloader&dd=<user_id>&ver=1&is=0&q=<search_quer…	1
3	Data Exfiltration	critical	content.js (line 533)	The `os()` function parses the current page URL to extract search query parameters, checking the hostname's second-level domain against three sets of obfuscated patterns sourced from the decrypted C2 payload (`T.g`, `…	1
4	Remote Code Loading	critical	content.js (line 494)	The `ru()` function sends `document.body.classList` (stored in `h`) to the background worker, then retrieves the server-assigned user ID (`'dd'`) and the C2 server's encrypted payload (`'dt'`). It derives a 32-byte AE…	1
5	Remote Code Loading	critical	content.js (line 554)	This function implements AES-CBC decryption using `window.crypto.subtle` with a hardcoded all-zero IV (`iv` initialized to 16 zero bytes at line 727). A static IV in AES-CBC is a cryptographic weakness that makes the …	1
6	Tracking	critical	background.js (line 482)	On first install, the extension silently beacons to `https://aethemselveb.info/install?ext=LinkDownloader&ver=1` — a domain unrelated to the extension's stated purpose. The server response (`E`) is a server-assigned u…	1
7	Obfuscation	high	background.js (line 1)	All method names and string literals are encoded with hex and unicode escape sequences (e.g. `\x64\u0065\u0066\u0069\x6e\u0065\x50\x72\x6f\u0070\u0065\u0072\x74\u0079` decodes to `defineProperty`). This is a classic a…	1
8	Unauthorized Data Collection	high	background.js (line 603)	The background service worker listens for messages with `wk: 'val'` from content.js and receives `n.bod` (the current page's `document.body.classList`). When no cached value exists for key `'bod'`, it immediately forw…	1
9	Unauthorized Data Collection	high	content.js (line 1)	The content script runs on every HTTP/HTTPS page and immediately harvests all anchor `href` values from the DOM, storing the complete link list in `chrome.storage.local` under key `'sl'`. While the popup displays thes…	1
10	Obfuscation	medium	background.js (line 62)	Dozens of immediately-invoked function expressions (IIFEs) throughout both background.js and content.js contain logically dead code (branches guarded by `Math.random() > 1`, `while (x > 5)` where x=0, `while (i < 10)`…	1

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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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clients2.google.com	/service/update2/crx	https://clients2.google.com/service/update2/crx
*	/*	http:///
*	/*	https:///
fonts.googleapis.com	/css2	https://fonts.googleapis.com/css2?family=Roboto:wght@100;300;400;500;700;900&display=swap

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No IP addresses found

1.0 out of 5 · 1 most recent review

Text reviews

Positive

Negative

doesnt work

Ruvyzvat Kovalev·31 Dec 2022

Version History

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Browse and explore files within this extension package

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Security Alert: Confirmed Malware

LinkDownloader

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 1 Version10

Versions scanned

Files with findings

Extracted Indicators (URLs and IPs)

URLs

Contextual Analysis

User Reviews

Version History

Version-to-Version Code Diff

Extension Files

User Growth

Rating Count

Average Rating

User Reviews