Security Alert: Confirmed Malware

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

CRITICAL RISKRemoved from Chrome Web Store

Extension Excel Spreadsheets for Chrome

ID: eefampjmgmpmglccekaanhopjfhmafld

Could be malicious

Extension Info & Metadata

Status

Removed

Version

1.2

Size

0.01 MB

Rating

0.0/5

Reviews

Users

512

Type

Extension

Updated

Feb 28, 2026

Publisher Contextual Analysis

Trusted

Author: CAView 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

15,355

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Extension Excel Spreadsheets.

Extension Excel Spreadsheets for Chrome. Excel Spreadsheets for Chrome This Chrome extension allows users to adjust the brightness and background color of the Microsoft Cloud page. With a simple slider and color picker, users can customize their viewing experience to reduce eye strain and enhance readability. Ideal for anyone working on cloud-based spreadsheets or data management tasks.

User Growth

Showing data from Oct 29, 2024 to Oct 28, 2025

Versions

+38.75%(+143 users)

Compared to 3 months ago

1 version released in this period

Rating Count

Total: 0 ratings

Average Rating

Current: 0.00 / 5.0

Extracted Data

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By severity

Critical1

High1

Medium2

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
1.1 Code review	4

Extension Version	Code Review Findings
1.1	4

Files with findings

3 distinct paths — top paths by unique finding count:

exc-extension.html2
background.js1
popup.js1

S.No.	Category	Severity	File	Summary	Found in Version
1	Phishing	critical	exc-extension.html (line 1)	On installation, `background.js` opens this page which embeds a full-viewport iframe pointing to `https://t.ly/exce-extension` — a URL shortener whose true destination is completely opaque. Loading arbitrary external …	1.1
2	Remote Code Loading	high	background.js (line 1)	Immediately on installation the extension silently opens a new tab to `exc-extension.html`, which in turn renders the full-screen external iframe. This is the trigger for the phishing/redirect delivery mechanism; legi…	1.1
3	Code Injection	medium	popup.js (line 1)	The popup uses `chrome.scripting.executeScript` to inject JavaScript into any active tab in any window. While the current payload only sets CSS properties, the `scripting` permission combined with `activeTab` means th…	1.1
4	Obfuscation	medium	exc-extension.html (line 1)	Both HTML files (`popup.html` and `exc-extension.html`) use a deliberately fragmented tag syntax — every `<` is placed alone on a line with a space, splitting normal HTML tags across multiple lines (e.g., `< !DOCTYPE …	1.1

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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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exc-extension353.vercel.app	/mcfstat.json	https://exc-extension353.vercel.app/mcfstat.json

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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

Extension Excel Spreadsheets for Chrome

Extension Info & Metadata

Publisher Contextual Analysis

Chrome Web Store Metadata

Screenshots & Videos

About this extension

Analytics & Metrics

User Growth

Rating Count

Average Rating

Static Code Security Analysis

Extracted Data

Code Review Findings Summary Across 2 Versions4

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