Security Alert: Confirmed Malware

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

CRITICAL RISKRemoved from Chrome Web Store

Block Site

ID: mnmhfhpjnideidieinfioekdemddngdm

Could be malicious

Supported Languages

🇩🇪German

Extension Info & Metadata

Status

Removed

Version

3.1.1

Size

0.03 MB

Rating

0.0/5

Reviews

Users

26,545

Type

Extension

Updated

Dec 27, 2022

Publisher Contextual Analysis

Author: garreopyno1973View Profile
Privacy: Privacy Policy
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

26,545

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Blockiert den Zugriff auf störende Websites, um Ihre Produktivität zu verbessern.

Blockiert den Zugriff auf ablenkende Websites, um Ihre Produktivität zu steigern. Block Site ist eine einfache Chrome-Erweiterung, die Ihre Produktivität steigert, indem sie den Zugriff auf ablenkende Websites nach Ihren Vorgaben blockiert. Klicken Sie zum Anpassen auf das B-Symbol in der Symbolleiste.

User Growth

Showing data from Dec 21, 2022 to Feb 27, 2023

Versions

No change in user count

Compared to 2 months ago

2 versions released in this period

Rating Count

Total: 0 ratings

Average Rating

Current: 0.00 / 5.0

Extracted Data

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By severity

Critical8

High3

Medium1

Low0

Versions scanned

Showing 1 of 2 scanned versions with more than one unique finding. Counts are unique findings that include each version.

Extension Version	Code Review Findings
3.1.0 Code review	12

Extension Version	Code Review Findings
3.1.0	12

Files with findings

2 distinct paths — top paths by unique finding count:

chunks/chunk.js10
background.js2

S.No.	Category	Severity	File	Summary	Found in Version
1	Network Interception	critical	chunks/chunk.js (line 200)	When a navigated URL matches a remotely-fetched blackUrlList entry, this code parses the URL's query string and exfiltrates the value of attacker-named parameters (the 'sq' list from the C2) into storage, then trigger…	3.1.0
2	Other	critical	chunks/chunk.js (line 88)	Hard-coded command-and-control endpoint 'xauhusjexe.click' (an unrelated, suspicious .click TLD) used for all remote calls. The extension is a 'Block Site' productivity tool — there is no legitimate reason to contact …	3.1.0
3	Privilege Escalation	critical	chunks/chunk.js (line 359)	Beacons a per-install client ID + extension ID to the C2 every ~50 seconds (driven by the 'check' alarm in background.js) and, on response, silently opens attacker-supplied URLs in background tabs (chrome.tabs.create …	3.1.0
4	Privilege Escalation	critical	chunks/chunk.js (line 419)	Opens C2-supplied 'click_action' URLs in new tabs — either active (foreground redirect, ads==4 branch when user is on a targeted site) or background (silent pop-unders for the periodic 'updtime' alarm). This converts …	3.1.0
5	Privilege Escalation	critical	background.js (line 524)	Two self-rescheduling alarms drive the malicious behavior: 'check' (~49s) calls zc/checkTab to beacon the C2 and open attacker tabs, and 'updtime' (interval supplied by the C2 via updateSetting) calls show/createNote …	3.1.0
6	Remote Code Loading	critical	chunks/chunk.js (line 180)	Fetches operational parameters (alarm/beacon timers) from the attacker server over plain HTTP and writes them into local storage so the periodic alarms in background.js can adopt remote-controlled cadences. This is re…	3.1.0
7	Remote Code Loading	critical	chunks/chunk.js (line 320)	Pulls a remotely-controlled URL match list and a 'sq' (search-query) parameter from the C2, persisting them so the extension's checkBlackUrlList logic can act on user navigation to attacker-chosen domains/queries. Thi…	3.1.0
8	Unauthorized Data Collection	critical	chunks/chunk.js (line 263)	POSTs the unique persistent clientID, extension ID, install timestamp, click counters, and (in 'ads==4' mode) hijacked search-query value 'sq' to /api_v3, then opens server-supplied click_action URLs in tabs via showN…	3.1.0
9	Other	high	chunks/chunk.js (line 110)	Blindly issues no-referrer / no-cors fetches against an arbitrary list of URLs returned by the C2. This pattern is used to generate ad impressions or perform click fraud against attacker-supplied affiliate URLs from t…	3.1.0
10	Privilege Escalation	high	background.js (line 623)	On every service-worker startup the extension provisions a tracking client ID, schedules the malicious 'check'/'updtime' alarms, and refreshes the remote target list (getBlackList) and operational parameters (updateSe…	3.1.0
11	Tracking	high	chunks/chunk.js (line 119)	Generates a persistent random clientID (10 hex chars + install timestamp) on first install and stores it locally; this ID is then sent on every C2 beacon (checkTab, createNote) to uniquely fingerprint and track the us…	3.1.0
12	Obfuscation	medium	chunks/chunk.js (line 92)	Pervasive use of bracket-notation property access (chrome['storage'], app['funcs'], data['append'], etc.) throughout the malicious chunk.js code — a deliberate light obfuscation pattern intended to defeat static analy…	3.1.0

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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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clients2.google.com	/service/update2/crx	https://clients2.google.com/service/update2/crx
http:	-	http://${config[

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No IP addresses found

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 Alert: Confirmed Malware

Block Site

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 2 Versions12

Versions scanned

Files with findings

Extracted Indicators (URLs and IPs)

URLs

Contextual Analysis

Version History

Version-to-Version Code Diff

Code Diff

Extension Files

User Growth

Rating Count

Average Rating