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AitM Phishing Attacks Bypass MFA and EDR
Attackers are increasingly using new phishing toolkits (open-source, commercial, and criminal) to execute adversary-in-the-middle (AitM) attacks. AitM enables attackers to not just harvest credentials but steal live sessions, allowing them to bypass traditional phishing prevention controls such as MFA, EDR, and email content filtering. In this article, we're going to look at what AitM phishing is, how it works, and what organizations need to be able to detect and block these attacks effectively.
AitM phishing:-
AitM phishing is a technique that uses dedicated tooling to act as a proxy between the target and a legitimate login portal for an application. As it's a proxy to the real application, the page will appear exactly as the user expects, because they are logging into the legitimate site – just taking a detour via the attacker's device. For example, if accessing their webmail, the user will see all their real emails; if accessing their cloud file store then all their real files will be present, etc.
This gives AitM an increased sense of authenticity and makes the compromise less obvious to the user. However, because the attacker is sitting in the middle of this connection, they are able to observe all interactions and also take control of the authenticated session to gain control of the user account.
While this access is technically temporary (since the attacker is unable to reauthenticate if prompted) in practice authenticated sessions can often last as long as 30 days or more if kept active. Additionally, there are a wide range of persistence techniques that allow an attacker to maintain some level of access to the user account and/or targeted application indefinitely.
Refer to the links for further information:-
AiTM/ MFA phishing attacks in combination with "new" Microsoft protections (2024 edition) (jeffreyappel.nl)
https://thehackernews.com/2024/08/how-to-stop-aitm-phishing-attack.html
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