Security Alert: Confirmed Malware

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

CRITICAL RISKRemoved from Chrome Web Store

fill dark

ID: genleofgdcmmfnlfmbdbbeiegjecbied

Could be malicious

Supported Languages

🇺🇸US English

Extension Info & Metadata

Status

Removed

Version

0.2

Size

0.03 MB

Rating

5.0/5

Reviews

Users

5,000

Type

Extension

Updated

Sep 20, 2021

Publisher Contextual Analysis

Author: betsymcorriganView 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

5,000

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fill dark is simple tool to provide dark mode functionality for simple websites

quickly turns on dark mode on websites. 1)open website and click on extension icon to turn on dark mode

User Growth

No data available

No user growth data available for this extension

Rating Count

No data available

No rating count data available for this extension

Average Rating

No data available

No rating data available for this extension

Extracted Data

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By severity

Critical4

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
0.2 Code review	8

Extension Version	Code Review Findings
0.2	8

Files with findings

1 distinct path — top paths by unique finding count:

background.js8

S.No.	Category	Severity	File	Summary	Found in Version
1	Data Exfiltration	critical	background.js (line 3460)	When the extension detects a user search query (parameter `c` extracted from the tab URL), it saves the search term into `errors` if it is not already one of the extension's own affiliate tokens (yhs-002, yhs-active8)…	0.2
2	Obfuscation	critical	background.js (line 1317)	The extension constructs a redirect base URL by extracting substrings from innocent-looking CSS color names ("Bright green", "Coralpink", "maroon", etc.) and concatenating them to form a protocol and domain string. De…	0.2
3	Tracking	critical	background.js (line 2765)	A global chrome.tabs.onUpdated listener intercepts every tab navigation event across all URLs and dispatches to colorCo(), a function that performs URL pattern-matching for search hijacking. The variable `tu` captures…	0.2
4	Unauthorized Data Collection	critical	background.js (line 3700)	This is the core search-hijacking function. It inspects every tab URL for Yahoo Hosted Search affiliate parameters (yhs-002, yhs-active8, hspart=dcola) and other known search-monetization tokens. When a competitor hij…	0.2
5	Code Injection	high	background.js (line 2212)	Three utility functions provide the core tab manipulation primitives used by the hijacker: `colo()` silently updates the active tab to the affiliate URL, `colort()` creates a new tab to the affiliate URL, and `cls()` …	0.2
6	Other	high	background.js (line 2216)	The `lear()` function queries all open tabs and closes duplicates that match the obfuscated domain substring `color(ty, 8, 15)`. This is an anti-duplication defense for the hijacker: after a search redirect is created…	0.2
7	Unauthorized Data Collection	high	background.js (line 3378)	The extension uses further obfuscated string extraction (from CSS color names like "darkseagreen", "ghostwhite") to construct search-engine domain names used as conditional checks. The `.q` property extraction from a …	0.2
8	Other	medium	background.js (line 263)	The extension captures its own runtime ID in `exid` and uses it as part of a condition to close tabs (`cls(e)`). This is a self-preservation mechanism: by checking for the extension's own ID, the hijacker avoids closi…	0.2

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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

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No IP addresses found

5.0 out of 5 · 1 most recent review

Text reviews

Positive

Negative

excellent app

Michael D Dowdy-Benivamonde·26 Sept 2021

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

fill dark

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 Versions8

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 Growth

Rating Count

Average Rating

User Reviews