Friday, July 19, 2024
EHA

New Google Cookies Exploit Allows Access After Password Reset

A Critical Google Cookies exploit involves manipulating or stealing user cookies, which store authentication information, to gain unauthorized access to accounts. 

Hackers exploit this illicit mechanism to:-

  • Impersonate users
  • Hijack sessions
  • Gain control over sensitive information
  • Gain unauthorized access to websites 
  • Gain unauthorized access to applications

A developer, PRISMA, discovered a major Google cookie exploit in Oct 2023 that allows persistent access post-password reset. A threat actor later integrated it into Lumma Infostealer, causing a ripple effect across malware groups.

Cybersecurity researchers at Cloudsek recently identified a new critical Google Cookies exploit that enables threat actors to persistently gain Google access after a password reset.

While researchers discovered this critical flaw by using “HUMINT,” and the root of the exploit has been discovered at “MultiLogin,” it’s an undocumented Google OAuth endpoint.

Google Cookies Exploit

On Oct 20, 2023, CloudSEK’s XVigil found ‘PRISMA’ unveiling a potent 0-day solution for Google accounts on Telegram:

  • Session Persistence: Stays valid after a password change, bypassing security.
  • Cookie Generation: Creates valid cookies for uninterrupted access.

Malware reverses to target Chrome’s WebData token_service table that helps in extracting:-

  • Tokens
  • Account IDs
Structure of the token_service table
Structure of the token_service table (Source – Cloudsek)

Besides this, the table holds crucial columns like:-

  • GAIA ID (service)
  • Encrypted_token

Decryption uses Chrome’s Local State encryption key that is stored in the “UserData directory,” which mirrors the password encryption.

Chromium’s source code unveils the MultiLogin endpoint, an internal sync mechanism for Google accounts. 

Google’s chromium source code reveals parameter format, Data Format, and purpose
Google’s chromium source code reveals parameter format, Data Format, and purpose (Source – Cloudsek)

It aligns browser account states with Google’s authentication cookies for a consistent user experience. Besides this, several attempts were made to locate it using Google Dork, but all of them were unsuccessful.

The MultiLogin endpoint manages simultaneous sessions by accepting account IDs and auth-login tokens.

This undocumented MultiLogin endpoint, a crucial part of Google’s OAuth system, allows for the regeneration of cookies. 

Lumma’s sophisticated approach involves encrypting the token: GAIA ID pair, blackboxing the exploit and adding secrecy to its core mechanics.

Black boxing serves two purposes, and here we have mentioned them:-

  • Protection of the Exploit Technique
  • Evasion of Detection

Lumma’s sophisticated exploit manipulates the token: GAIA ID pair, enabling continuous cookie regeneration for Google services. Alarming is its persistence post-password reset, which allows:-

  • Prolonged account exploitation
  • Unnoticed account exploitation

Encrypting the key component signals a shift towards advanced, stealth-focused cyber threats, highlighting the stealth and protection of exploit methodologies in malware development.

Website

Latest articles

Hackers Claiming Dettol Data Breach: 453,646 users Impacted

A significant data breach has been reported by a threat actor known as 'Hana,'...

CrowdStrike Update Triggers Widespread Windows BSOD Crashes

A recent update from cybersecurity firm CrowdStrike has caused significant disruptions for Windows users,...

Operation Spincaster Disrupts Approval Phishing Technique that Drains Victim’s Wallets

Chainalysis has launched Operation Spincaster, an initiative to disrupt approval phishing scams that have...

Octo Tempest Know for Attacking VMWare ESXi Servers Added RansomHub & Qilin to Its Arsenal

Threat actors often attack VMware ESXi servers since they accommodate many virtual machines, which...

TAG-100 Actors Using Open-Source Tools To Attack Gov & Private Orgs

Hackers exploit open-source tools to execute attacks because they are readily available, well-documented, and...

macOS Users Beware Of Weaponized Meeting App From North Korean Hackers

Meeting apps are often targeted and turned into weapons by hackers as they are...

Hackers Exploiting Legitimate RMM Tools With BugSleep Malware

Since October 2023, MuddyWater, which is an Iranian threat group linked to MOIS, has...
Tushar Subhra Dutta
Tushar Subhra Dutta
Tushar is a Cyber security content editor with a passion for creating captivating and informative content. With years of experience under his belt in Cyber Security, he is covering Cyber Security News, technology and other news.

Free Webinar

Low Rate DDoS Attack

9 of 10 sites on the AppTrana network have faced a DDoS attack in the last 30 days.
Some DDoS attacks could readily be blocked by rate-limiting, IP reputation checks and other basic mitigation methods.
More than 50% of the DDoS attacks are employing botnets to send slow DDoS attacks where millions of IPs are being employed to send one or two requests per minute..
Key takeaways include:

  • The mechanics of a low-DDoS attack
  • Fundamentals of behavioural AI and rate-limiting
  • Surgical mitigation actions to minimize false positives
  • Role of managed services in DDoS monitoring

Related Articles