Is "Proton ICS Auto-Importer" on Firefox Add-ons Safe to Install?
When clicking a link that would normally download a .ics file, the extension instead opens the a page for Proton Calendar in a new tab, and adds the file to be imported. You should be logged in to proton calendar for this extension to work.
Risk Assessment
Analyzed30 security findings detected across all analyzers
Firefox extension requesting 5 permissions
Severity Breakdown
Finding Categories
YARA Rules Matched
5 rules(10 hits)Requested Permissions
5 permissionsAccess and modify data on every website you visit
About This Extension
Detailed Findings
13 totalYARA Rule Matches
5 rulesIndicators of Compromise
Network indicators, suspicious strings, and potential IoCs extracted during analysis
All Indicators · 17
detected Domain: signingca1.addons.mozilla.org XIOC detected Domain: signingca1.addons.mozilla.org
extracted_from_files
detected URL: https://account.proton.me/u/1/calendar/import-export?ics_id=* XIOC detected URL: https://account.proton.me/u/1/calendar/import-export?ics_id=*
extracted_from_files
detected MD5 Hash: ac88a85cf6f4173553d2e18484f2dc1e XIOC detected MD5 Hash: ac88a85cf6f4173553d2e18484f2dc1e
extracted_from_files
detected Domain: location.search XIOC detected Domain: location.search
extracted_from_files
detected Domain: importbtn.click XIOC detected Domain: importbtn.click
extracted_from_files
detected Domain: resp.meta.name XIOC detected Domain: resp.meta.name
extracted_from_files
detected Domain: submitbtn.click XIOC detected Domain: submitbtn.click
extracted_from_files
detected URL: http://addons.mozilla.org/ca/crl.pem0N XIOC detected URL: http://addons.mozilla.org/ca/crl.pem0N
extracted_from_files
detected URL: https://account.proton.me/u/1/calendar/import-export?ics_id= XIOC detected URL: https://account.proton.me/u/1/calendar/import-export?ics_id=
extracted_from_files
detected URL: https://account.proton.me/ XIOC detected URL: https://account.proton.me/
extracted_from_files
detected Domain: mozilla.com XIOC detected Domain: mozilla.com
extracted_from_files
detected Domain: addons.mozilla.org XIOC detected Domain: addons.mozilla.org
extracted_from_files
detected Domain: content-signature.mozilla.org XIOC detected Domain: content-signature.mozilla.org
extracted_from_files
detected Domain: tbb6d87a3a61422258ebec547752ec264.ac88a85cf6f4173553d2e18484f2dc1e.addons.mozilla.org XIOC detected Domain: tbb6d87a3a61422258ebec547752ec264.ac88a85cf6f4173553d2e18484f2dc1e.addons.mozilla.org
extracted_from_files
detected Domain: account.proton.me XIOC detected Domain: account.proton.me
extracted_from_files
detected Domain: date.now XIOC detected Domain: date.now
extracted_from_files
detected Domain: message.id XIOC detected Domain: message.id
extracted_from_files
Security Analysis Summary
Security Analysis Overview
Proton ICS Auto-Importer is a Firefox Add-ons extension published by Timon. Version 1.0 has been analyzed by the Risky Plugins security platform, receiving a risk score of 84.93/100 (HIGH risk) based on 30 security findings.
Risk Assessment
This extension presents critical security risk. Severe issues were detected, potentially including malware indicators, exposed secrets, or dangerous behaviors. Installation is strongly discouraged until these issues are addressed.
Findings Breakdown
- High: 10 finding(s)
- Medium: 20 finding(s)
What Was Analyzed
The security assessment covers multiple analysis categories:
- Malware Detection: YARA rule matching against 2,400+ malware signatures
- Secret Detection: Scanning for exposed API keys, tokens, and credentials
- Static Analysis: Code-level security analysis for common vulnerability patterns
- Network Analysis: Detection of suspicious network communications and endpoints
- Obfuscation Detection: Identification of code obfuscation techniques
Developer Information
Proton ICS Auto-Importer is published by Timon on the Firefox Add-ons marketplace. The extension has approximately 3 users.
Recommendation
This extension is not recommended for installation without thorough manual review. Consider alternatives with lower risk scores, or contact the developer to address the identified security concerns.
Source Code Not Available
Source code is not available for this version of the extension.
Frequently Asked Questions
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