Monday, April 15, 2024

Hackers Hiding Malware behind Captcha to Bypass Secure Email Gateways

Hackers using Captcha to hide the presence of malware and to evade email security gateways. By using this technique attackers show that email is sent human and evades detection.

Attackers use various social engineering methods to trick the users to believe the emails is from a legitimate source, here the email’s are from a compromised account at @avis.ne.jp.

Hidden Malicious Page Behind Captcha

Cofense identified a new email campaign that alerts recipients that they received a new voicemail message. The voice was with a preview that tempts users to listen to the full message.

Email Body credits: Cofense

The email contains a play button which has an embedded hyperlink pointing to the page that contains captcha, this step is to bypass the automated analysis tools and to bypass secure email gateways.

Once the user click’s on the link they get directed to the captcha page, once the captcha check completed users taken to the main phishing page that hosted on MSFT infrastructure.

The phishing page asks the user to select a Microsoft account to log in when the victim login all their credentials are captured.

Phishing page Image credits: Cofense

“Both pages are legitimate Microsoft top-level domains, so when checking these against domain reputation databases we receive a false negative and the pages come back as safe,” reads Cofense report.

The attack method is nothing new, the important part is the Captcha page which makes the attack more successful by evading the security controls placed.

Email Header Analysis always helps you in preventing such malicious threat, emails are the critical business asset and they need to be secured.

Before clicking on a link, investigate that the website is safe, there are various methods to the check is this website safe or not.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity and hacking news updates.

Website

Latest articles

Hacker Customize LockBit 3.0 Ransomware to Attack Orgs Worldwide

Cybersecurity researchers at Kaspersky have uncovered evidence that cybercriminal groups are customizing the virulent...

Microsoft .NET, .NET Framework, & Visual Studio Vulnerable To RCE Attacks

A new remote code execution vulnerability has been identified to be affecting multiple Microsoft...

LightSpy Hackers Indian Apple Device Users to Steal Sensitive Data

The revival of the LightSpy malware campaign has been observed, focusing on Indian Apple...

LightSpy Malware Attacking Android and iOS Users

A new malware known as LightSpy has been targeting Android and iOS users.This sophisticated...

This Startup Aims To Simplify End-to-End Cybersecurity, So Anyone Can Do It

The Web3 movement is going from strength to strength with every day that passes....

Alert! Palo Alto RCE Zero-day Vulnerability Actively Exploited in the Wild

In a recent security bulletin, Palo Alto Networks disclosed a critical vulnerability in its...

6-year-old Lighttpd Flaw Impacts Intel And Lenovo Servers

The software supply chain is filled with various challenges, such as untracked security vulnerabilities...
Guru baran
Guru baranhttps://gbhackers.com
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Top 3 SME Attack Vectors

Securing the Top 3 SME Attack Vectors

Cybercriminals are laying siege to small-to-medium enterprises (SMEs) across sectors. 73% of SMEs know they were breached in 2023. The real rate could be closer to 100%.

  • Stolen credentials
  • Phishing
  • Exploitation of vulnerabilities

Related Articles