Menu

  • Alerts
  • Incidents
  • News
  • APTs
  • Cyber Decoded
  • Cyber Hygiene
  • Cyber Review
  • Cyber Tips
  • Definitions
  • Malware
  • Threat Actors
  • Tutorials

Useful Tools

  • Password generator
  • Report an incident
  • Report to authorities
No Result
View All Result
CTF Hack Havoc
CyberMaterial
  • Education
    • Cyber Decoded
    • Definitions
  • Information
    • Alerts
    • Incidents
    • News
  • Insights
    • Cyber Hygiene
    • Cyber Review
    • Tips
    • Tutorials
  • Support
    • Contact Us
    • Report an incident
  • About
    • About Us
    • Advertise with us
Get Help
Hall of Hacks
  • Education
    • Cyber Decoded
    • Definitions
  • Information
    • Alerts
    • Incidents
    • News
  • Insights
    • Cyber Hygiene
    • Cyber Review
    • Tips
    • Tutorials
  • Support
    • Contact Us
    • Report an incident
  • About
    • About Us
    • Advertise with us
Get Help
No Result
View All Result
Hall of Hacks
CyberMaterial
No Result
View All Result
Home Alerts

ZeroFont Email Trick Deceives Outlook

September 27, 2023
Reading Time: 2 mins read
in Alerts

Hackers are employing a deceptive technique known as “ZeroFont” in emails to trick security tools in Microsoft Outlook, making malicious emails appear as if they have been safely scanned. This phishing technique takes advantage of flaws in how AI and natural language processing systems in email security platforms analyze text.

It involves inserting hidden words or characters with a font size set to zero, making the text invisible to human recipients but still readable by NLP algorithms. By doing so, the attackers aim to evade security filters by mixing benign terms with suspicious content, confusing AI interpretation and security checks.

The use of ZeroFont in this manner was recently documented by ISC Sans analyst Jan Kopriva, highlighting its potential to significantly enhance the effectiveness of phishing attacks. The attackers manipulate message previews on widely-used email clients, like Microsoft Outlook, to make emails appear more legitimate and secure.

For instance, a phishing email might display a message in the email list pane that suggests it has been scanned and secured by a reputable security tool, while the actual content in the preview pane is unrelated, such as a job offer. This discrepancy aims to create a false sense of security in the recipient, increasing the likelihood of them opening and engaging with the malicious email.

While the use of ZeroFont has been previously documented, this new approach underscores its ongoing relevance and the need for user awareness. It can potentially circumvent email security measures and deceive individuals into interacting with phishing emails. The report warns that other email clients may also be vulnerable to this technique, emphasizing the importance of vigilance among email users to avoid falling victim to such deceptive tactics.

Reference:
  • A new spin on the ZeroFont phishing technique
Tags: AICyber AlertCyber Alerts 2023CybersecurityEmailsHackersMicrosoft OutlookOutlookPhishingSeptember 2023VulnerabilitiesZeroFont
ADVERTISEMENT

Related Posts

COLDRIVER Hackers Target Sensitive Data

COLDRIVER Hackers Target Sensitive Data

May 8, 2025
COLDRIVER Hackers Target Sensitive Data

Cisco Fixes Flaw in IOS Wireless Controller

May 8, 2025
COLDRIVER Hackers Target Sensitive Data

CoGUI Targets Consumer and Finance Brands

May 8, 2025
Critical Kibana Flaws Allows Code Execution

Mirai Botnet Exploits Vulnerabilities in IoT

May 7, 2025
Critical Kibana Flaws Allows Code Execution

Critical Kibana Flaws Allows Code Execution

May 7, 2025
Critical Kibana Flaws Allows Code Execution

New OttoKit Flaw Targets WordPress Sites

May 7, 2025

Latest Alerts

CoGUI Targets Consumer and Finance Brands

COLDRIVER Hackers Target Sensitive Data

Cisco Fixes Flaw in IOS Wireless Controller

New OttoKit Flaw Targets WordPress Sites

Mirai Botnet Exploits Vulnerabilities in IoT

Critical Kibana Flaws Allows Code Execution

Subscribe to our newsletter

    Latest Incidents

    Masimo Cyberattack Disrupts Manufacturing

    Cyberattack Targets Tepotzotlán Facebook

    West Lothian Schools Hit by Ransomware

    UK Legal Aid Agency Faces Cyber Incident

    South African Airways Hit by Cyberattack

    Coweta County School System Cyberattack

    CyberMaterial Logo
    • About Us
    • Contact Us
    • Jobs
    • Legal and Privacy Policy
    • Site Map

    © 2025 | CyberMaterial | All rights reserved

    Welcome Back!

    Login to your account below

    Forgotten Password?

    Retrieve your password

    Please enter your username or email address to reset your password.

    Log In

    Add New Playlist

    No Result
    View All Result
    • Alerts
    • Incidents
    • News
    • Cyber Decoded
    • Cyber Hygiene
    • Cyber Review
    • Definitions
    • Malware
    • Cyber Tips
    • Tutorials
    • Advanced Persistent Threats
    • Threat Actors
    • Report an incident
    • Password Generator
    • About Us
    • Contact Us
    • Advertise with us

    Copyright © 2025 CyberMaterial