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Cybercriminals are increasingly leveraging adversary-in-the-middle (AiTM) attacks with reverse proxies to bypass multi-factor authentication (MFA), a security measure widely adopted to protect against unauthorized access. This sophisticated technique allows attackers to intercept user credentials and authentication cookies, effectively neutralizing the added security that MFA is designed to provide. Instead of relying on simple, fake landing pages, attackers position reverse proxies between the victim and legitimate web services, creating an authentic-looking login experience. This method has proven highly effective in capturing sensitive information, as the only telltale sign might be a subtle discrepancy in the browser's address bar.

The proliferation of Phishing-as-a-Service (PhaaS) toolkits has significantly lowered the barrier to entry for executing these complex attacks. Platforms like Tycoon 2FA and Evilproxy offer ready-made templates for targeting popular services and include features like IP filtering and JavaScript injection to evade detection. Open-source tools such as Evilginx, originally intended for penetration testing, have also been repurposed by malicious actors, further exacerbating the problem. These tools provide customizable reverse proxy capabilities that enable even novice cybercriminals to launch sophisticated MFA bypass campaigns.

To combat these evolving threats, security experts recommend that organizations reassess their current MFA strategies and consider adopting more robust authentication methods. WebAuthn, a passwordless authentication standard utilizing public key cryptography, offers a potential solution by eliminating password transmission and rendering server-side authentication databases useless to attackers. Additionally, organizations should implement measures to detect unusual session behavior, monitor for newly registered domains, and analyze TLS fingerprints to identify potential AiTM activity. By staying vigilant and adapting their security strategies, organizations can better defend against these advanced phishing techniques and protect their valuable assets.

ImgSrc: blogger.googleu

References :

• gbhackers.com: Threat Actors Use AiTM Attacks with Reverse Proxies to Bypass MFA
• malware.news: Threat Actors Use AiTM Attacks with Reverse Proxies to Bypass MFA
• securityonline.info: AiTM Attacks Bypass MFA Despite Widespread Adoption
• cyberpress.org: CyberPress reports on AiTM attacks with reverse proxies enable threat actors to bypass MFA.
• Cyber Security News: Cybersercurity news reports new MintsLoader drops GhostWeaver.
• gbhackers.com: Threat Actors Use AiTM Attacks with Reverse Proxies to Bypass MFA
• Daily CyberSecurity: AiTM Attacks Bypass MFA Despite Widespread Adoption

Classification:

• HashTags: #MFA #phishing #AiTM
• Company: Multiple
• Target: Enterprises
• Feature: MFA Bypass
• Type: Hack
• Severity: HighRisk