Tuesday, July 23, 2024

Beware!! BrazKing Android Malware Upgraded & Attack Banks

The BrazKing Android Banking trojan has resurfaced in the form of a phishing app to gain access to financial data. 

The app has been updated with new dynamic overlays to create the illusion that the banking data is being accessed. This technique will also work without requesting risky permissions, which can raise red flags for security apps.

Banking Trojans are generally designed to steal banking credentials that are transmitted through the Android device. The only purpose is to steal money from the victim’s account.

A local threat group operates BrazKing, and it mainly targets Brazillian users. While it’s being tracked during the examination of IBM Trusteer researchers and MalwareHunterTeam, BrazKing belongs to the RAT category, and it’s an Android banking Trojan.

Stealthier Version of BrazKing

The BrazKing developers now use its core overlay mechanism to pull fake overlay screens from the C2 server in real-time. In short, BrazKing is more agile than before, with this move to a new overlay technique.

To detect which app the user opened, the BrazKing abused the Android’s accessibility service in its previous version which is known as “PixStealer.” Here, from a hardcoded URL, the BrazKing pulls an overlay screen to present it on top of the targeted banking app when it detects the launch of that targeted banking app.

According to the Security Intelligence report, In the same manner, the desktop banking Trojans also deliver their malicious configurations and web injections. Not only that even, BrazKing also has the ability to steal two-factor authentication (2FA) codes to carry out financial fraud attacks.


Here we have mentioned all the abilities that BrazKing king can perform:-

  • Rather than taking screenshots in picture format, BrazKing operates the screen programmatically.
  • Keylogger capabilities 
  • RAT capabilities
  • Read SMS without the ‘android.permission.READ_SMS’ permission
  • Read contact lists without ‘android.permission.READ_CONTACTS’ permission
  • Input injection
  • Fake overlay screens
  • Stealing 2FA Codes

Data collected

Here we have mentioned all the data collected by the BrazKing from the compromised Android devices:-

  • BUILD version
  • Device name
  • OS version
  • Device manufacturer
  • Android ID
  • List of installed apps
  • Display properties

Infection Cycle of BrazKing

With a social engineering message, the infection cycle of BrazKing starts with a link to an HTTPS website. Here, in this stage, it warns the target user about the security threats in their devices.

But, here at this point, updating the operating system to the latest version prompts a fake overlay and tricks the user into enabling the “install apps from unknown sources” option from settings.

Here we have mentioned the infection cycle of BrazKing below:-

  • Initial Download
  • Request access to the “Accessibility Service”
  • First Run – New Bot Registration
  • Remove-Me-Not

So, the experts have strongly recommended users to stay alert and cautious with APK downloads outside the Google Play Store.

But, apart from this, they have also asserted that this BrazKing Android banking trojan operated by the local threat groups in Brazil, and that’s on Portuguese-speaking websites they are being circulated.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity updates.


Latest articles

Beware Of Dating Apps Exposing Your Personal And Location Details To Cyber Criminals

Threat actors often attack dating apps to steal personal data, including sensitive data and...

Hackers Abusing Google Cloud For Phishing

Threat actors often attack cloud services for several illicit purposes. Google Cloud is targeted...

Two Russian Nationals Charged for Cyber Attacks against U.S. Critical Infrastructure

The United States has designated Yuliya Vladimirovna Pankratova and Denis Olegovich Degtyarenko, two members...

Threat Actors Taking Advantage of CrowdStrike BSOD Bug to Deliver Malware

Threat actors have been found exploiting a recently discovered bug in CrowdStrike's software that...

NCA Shut’s Down the Most Popular “digitalstress” DDoS-for-hire Service

The National Crime Agency (NCA) has successfully infiltrated and dismantled one of the most...

Play Ransomware’s Linux Variant Attacking VMware ESXi Servers

A new Linux variant of Play ransomware targets VMware ESXi environments, which encrypts virtual...

SonicOS IPSec VPN Vulnerability Let Attackers Cause Dos Condition

SonicWall has disclosed a critical heap-based buffer overflow vulnerability in its SonicOS IPSec VPN....
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

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