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https://www.malwarebytes.com/blog/news/2025/09/disrupted-phishing-service-was-after-microsoft-365-credentials

Microsoft and Cloudflare have disrupted a Phishing-as-a-Service operation, known as RaccoonO365.

The primary goal of RaccoonO365 (or Storm-2246 as Microsoft calls it) was to rent out a phishing toolkit that specialized in stealing Microsoft 365 credentials. They were successful in at least 5,000 cases, spanning 94 countries since July 2024.

The operation provided the cybercriminals’ customers with stolen credentials, cookies, and data which they in turn could use to plunder OneDrive, SharePoint, and Outlook accounts for information to use in financial fraud, extortion, or to serve as initial access for larger attacks.

Roughly an attack would look like this:

• Emails were sent to victims with an attachment containing a link or QR code.
• The malicious link led to a page with a simple CAPTCHA. This and other anti-bot techniques were implemented to evade analysis without raising suspicion from the victim.
• After solving the CAPTCHA, the victim was redirected to a fake Microsoft O365 login page designed to harvest the entered credentials.

RaccoonO365 built its operation on top of legitimate infrastructure in an attempt to avoid detection. Leveraging free accounts, they strategically deployed Cloudflare workers to act as an intermediary layer, shielding their backend phishing servers from direct public exposure.

Reacting to this abuse of its services, Cloudflare teamed up with Microsoft’s Digital Crimes Unit (DCU). Using a court order granted by the Southern District of New York, the DCU seized 338 websites associated with RaccoonO365.

The danger of phishing kits like these is clear. Even non-technical criminals can lease a 30-day plan for $355 (to be paid in cryptocurrency) and get their hands on valid Microsoft O365 credentials. With the latest new feature of the phishing kit, users of the kit can even receive codes for certain multi-factor authentication (MFA) methods.

From there they can move forward to data theft, financial fraud, or even use the credentials to infiltrate an organization to deploy ransomware. And to give you an idea, RaccoonO365 customers were able to send emails to 9,000 targets per day. The suspected leaders of the operation had over 850 members on Telegram and have received at least US$100,000 in cryptocurrency payments.

The takedown of the websites and the attribution to a Nigerian suspect cut off the cybercriminals’ revenue streams, and significantly increased RaccoonO365’s operational costs. Besides that, the main suspect is believed to be the main coder behind the project and his apprehension by international law enforcement is likely to be a major blow to the operation.

Now, RaccoonO365 phishing kit customers can start worrying about how much of their information could be revealed in the aftermath of this disruption.

We’ll keep you posted.

Don’t fall for phishing attempts

In the operations run by RaccoonO365 two simple rules could have saved you from lots of trouble.

• Don’t click on links in unsolicited attachments
• Check if the website address in the browser matches the domain you expect to be on (eg. Microsoft.com).

Other important tips to stay safe from phishing in general:

• Verify the sender: Always check if the sender’s email address matches what you would expect it to be. It’s not always conclusive but it can help you spot some attempts.
• Check through an independent channel if the sender actually sent you an attachment or a link.
• Use up-to-date security software, preferably with a web protection component.
• Keep your device and all its software updated.
• Use multi-factor authentication for every account you can.
• Use a password manager. Password managers will not auto-fill a password to a fake site, even if it looks like the real deal to you.

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https://www.malwarebytes.com/blog/news/2025/09/disrupted-phishing-service-was-after-microsoft-365-credentials

https://www.malwarebytes.com/blog/news/2025/09/update-your-chrome-today-google-patches-4-vulnerabilities-including-one-zero-day

Google has released an update for its Chrome browser to patch four security vulnerabilities, including one zero-day. A zero-day vulnerability refers to a bug that has been found and exploited by cybercriminals before the vendor even knew about it (they have “zero days” to fix it).

This update is crucial since it addresses one vulnerability which is already being actively exploited and, reportedly, can be abused when the user visits a malicious website. It probably doesn’t require any further user interaction, which means the user doesn’t need to click on anything in order for their system to be compromised.

The Chrome update brings the version number to 140.0.7339.185/.186 for Windows, Mac and 140.0.7339.185 for Linux.

The easiest way to update Chrome is to allow it to update automatically, but you can end up lagging behind if you never close your browser or if something goes wrong—such as an extension stopping you from updating the browser.

To manually get the update, click the more menu (three stacked dots), then choose Settings > About Chrome. If there is an update available, Chrome will notify you and start downloading it. Then all you have to do is reload Chrome in order for the update to complete, and for you to be safe from the vulnerabilities.

You can find more elaborate update instructions and how to read the version number in our article on how to update Chrome on every operating system.

Technical details on the zero-day vulnerability

Google describes the zero-day vulnerability tracked as CVE-2025-10585 as a type confusion in V8. Reported by Google Threat Analysis Group on 2025-09-16.

Despite the short statement—Google never reveals a lot of details until everyone has had a chance to update—there are a few conclusions we can draw.

It helps to know that V8 is Google’s open-source Javascript engine.

A “type confusion” vulnerability happens when code doesn’t verify the object type passed to it and then uses the object without type-checking. So, a program mistakenly treats one type of data as if it were another, like confusing a list for a single value or interpreting a number as text. This mix-up can cause the software to behave unpredictably, creating opportunities for attackers to break in, steal data, crash programs, or even run malicious code.

Google’s Threat Analysis Group (TAG) focuses on spyware and nation-state attackers who abuse zero days for espionage purposes.

So, it stands to reason that an attacker used Javascript to create a malicious site that exploited this vulnerability and lured targeted victims to that website.

TAG reported the bug on September 16, and Google issued the patch one day later. That implies that the bug was urgent, or very easy to fix, and probably that both of those statements are true to some extent.

Usually, as more details become known or a patch gets reverse engineered, cybercriminals will start using the vulnerability in less targeted attacks.

Users of other Chromium-based browsers, such as Microsoft Edge, Brave, Opera, and Vivaldi, are also advised to keep an eye out for updates and install them when they become available.

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https://www.malwarebytes.com/blog/news/2025/09/update-your-chrome-today-google-patches-4-vulnerabilities-including-one-zero-day

https://www.malwarebytes.com/blog/news/2025/09/223-malicious-apps-removed-from-the-google-play-store-after-ad-fraud-campaign-discovered

Researchers have discovered a large ad fraud campaign on Google Play Store.

The Satori Threat Intelligence and Research team found 224 malicious apps which were downloaded over 38 million times and generated up to 2.3 billion ad requests per day. They named the campaign “SlopAds.”

Ad fraud is a type of fraud that lets advertisers pay for ads even though the number of impressions (the times that the ad has been seen) is enormously exaggerated.

While the main victims of ad fraud are the advertisers, there are consequences for the users that had these apps installed as well, such as slowed-down devices and connections due to the apps executing their malicious activity in the background without the user even being aware.

At first, to stay under the radar of Google’s app review process and security software, the downloaded app will behave as advertised, if a user has installed it directly from the Play Store.

But if the installation has been initiated by one of the campaign’s ads, the user will receive some extra files in the form of a steganographically encrypted payload.

If the app passes the first check it will receive four .png images that, when decrypted and reassembled, are actually an .apk file. The malicious file uses WebView (essentially a very basic browser) to send collected device and browser information to a Control & Command (C2) server which determines, based on that information, what domains to visit in further hidden WebViews.

The researchers found evidence of an AI (Artificial Intelligence) tool training on the same domain as the C2 server (ad2[.]cc). It is unclear whether this tool actively managed the ad fraud campaign.

Based on similarities in the C2 domain, the researchers found over 300 related domains promoting SlopAds-associated apps, suggesting that the collection of 224 SlopAds-associated apps was only the beginning.

Google removed all of the identified apps listed in this report from Google Play. Users are automatically protected by Google Play Protect, which warns users and blocks apps known to exhibit SlopAds associated behavior at install time on certified Android devices, even when apps come from sources outside of the Play Store.

You can find a complete list of the removed apps here: SlopAds app list

How to avoid installing malicious apps

While the official Google Play Store is the safest place to get your apps from, there is no guarantee that it will remain a non-malicious app just because it is in the Google Play Store. So here are a few extra measures you can take:

• Always check what permissions an app is requesting, and don’t just trust an app because it’s in the official Play Store. Ask questions such as: Do the permissions make sense for what the app is supposed to do? Why did necessary permissions change after an update? Do these changes make sense?
• Occasionally go over your installed apps and remove any you no longer need.
• Make sure you have the latest available updates for your device, and all your important apps (banking, security, etc.)
• Protect your Android with security software. Your phone needs it just as much as your computer.

Another precaution you can take if you’re looking for an app, do your research about the app before you go to the app store. As you can see from the screenshot above, many of the apps are made to look exactly the same as very popular legitimate ones (e.g. ChatGPT).

So, it’s important to know in advance who the official developer is of the app you want and if it’s even available from the app store.

As researcher Jim Nielsen demonstrated for the Mac App Store, there are a lot of apps trying to look like ChatGPT, but they are not the real thing. ChatGPT is not even in the Mac App Store, it is available in the Google Play Store for Android, but make sure to check that OpenAI is listed as the developer.

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https://www.malwarebytes.com/blog/news/2025/09/223-malicious-apps-removed-from-the-google-play-store-after-ad-fraud-campaign-discovered

https://www.malwarebytes.com/blog/news/2025/09/airline-data-broker-selling-5-billion-passenger-records-to-us-government

We already knew that the US airline industry gave the government access to passenger records. However, this week it emerged that at least five billion passenger records are being sold to government agencies via a searchable database—far more than was initially believed.

A few weeks ago, investigative research team 404 Media reported on a secretive relationship between many US airlines and the US government. That story showed that the airlines had sold US agencies access to around a billion records.

Now, researchers have found the data broker that collects flight data from the airline industry has made at least five billion records available to federal agencies.

The organization selling the data is the Airlines Reporting Corporation (ARC), which is owned and operated by at least eight US airlines. It sells the government this data under the Travel Intelligence Program (TIP), which was started after the 2001 attack on the World Trade Center.

ARC provides access to a searchable database of at least five billion records, updated daily with new ticketing information. At least one agency, the US Secret Service, has a contract to access this data, paying $885,000 for data through 2028, according to documents obtained by 404 Media.

Known clients

In June, 404 Media found that ARC had been making names, flight itineraries, and financial details available to US agencies, which were forbidden from revealing it as the source, under contract. The data included flights booked via 12,800 travel agencies, which submit ticket sales from over 270 carriers globally to ARC.

Originally developed as a financial clearing house, ARC provides payment settlement services for federal agencies and airlines. Known clients include Customs and Border Protection, and Immigration and Customs Enforcement. Travel dates and credit card numbers are available to federal customers, which also include the Securities and Exchange Commission, the Drug Enforcement Administration, and the US Marshals Service.

A long history of sharing data

The US airline industry has a long history of interacting with the US government. In 1996, Al Gore’s White House Commission on Aviation Safety and Security recommended automated screening for better flight security. A year later, most North American airlines voluntarily implemented what became known as the Computer Assisted Passenger Prescreening System (CAPPS). After the Transportation Security Administration (TSA) took over CAPPS, it built a system called CAPPS II, which used security color-coding for flight passengers. That system ran into trouble after several airlines admitted to giving the US government access to passenger data.

American Airlines reportedly confessed to making passengers’ records available in the early 2000s, as did United, while Northwest also gave NASA access to millions of passenger records. These relationships enabled data mining work at government agencies involving passenger records. A US General Accounting Office (GAO) report in 2004 found that CAPPS II was behind schedule, in part because it had failed to address privacy concerns.

“One air carrier initially agreed to provide passenger data for testing purposes, but adverse publicity resulted in its withdrawal from participation. Similar situations occurred for the other two potential data providers,” the report said. “TSA’s attempts to obtain test data are still ongoing, and privacy issues remain a stumbling block.”

The TSA canned CAPPS II that year, switching instead to a system called Secure Flight. This also implemented a color-coded security system for passengers and uses the US government’s No-Fly list.

The information that ARC funnels to the US government reportedly comes only from travel agencies, meaning that direct bookings with airlines hopefully won’t be logged in this way. Passengers might want to consider that when making travel plans.

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https://www.malwarebytes.com/blog/news/2025/09/airline-data-broker-selling-5-billion-passenger-records-to-us-government