}, Teabot : Android Banking Trojan Targets Banks in Europe, @online{barbatei:20210601:threat:83b0dfc, The website also serves as the command and control centre for the Alien malware. author = {Thomas Barabosch}, How to disable browser notifications in the Firefox web browser? There are large numbers of positive reviews for the apps. Keeping the software up-to-date is a good practice when it comes to device safety. Tap the "Power off" icon and hold it. An outdated system is way more vulnerable, which is why you should always be sure that your device's software is up-to-date. Additionally, Anatsa can capture everything shown on the victim's screen and function as a RAT. 2022 ZDNET, A RED VENTURES COMPANY. However, in this case, it is done in a more inventive way: the payload is posed as a new package of workout exercises in conformity with the app. url = {https://labs.bitdefender.com/2021/06/threat-actors-use-mockups-of-popular-apps-to-spread-teabot-and-flubot-malware-on-android/}, Sharkbot is distributed via the Google Play Store, but also using something relatively new in the Android malware: Direct reply feature for notifications. language = {English}, The protocol used to communicate with the C2 servers is an HTTP based protocol. author = {Jeroen Beckers}, These apps posed as QR code scanners, PDF scanners, and cryptocurrency apps. The DGA uses the current date and a specific suffix string (pojBI9LHGFdfgegjjsJ99hvVGHVOjhksdf) to finally encode that in base64 and get the first 19 characters. url = {https://twitter.com/ThreatFabric/status/1394958795508523008}, urldate = {2021-06-21} If we take a look at the decrypted payload, we can see how SharkBot is simply using JSON to send different information about the infected device and receive the commands to be executed from the C2. How did a Anatsa malware infiltrate my computer? title = {{Android overlay attacks on Belgian financial applications}}, Get rid of Windows malware infections today: Editors' Rating for Combo Cleaner:Outstanding! Scroll down until you see "Clear private data" and tap it. Depending on the C2 response, the dropper will decide whether or not to download Anatsa. Having a device infected with it may cause problems such as monetary loss, identity theft, loss of access to personal accounts, and other issues. Anatsa's droppers pose mainly as QR code and PDF scanners (for example, an app called QR Code Generator) and cryptocurrency apps. organization = {The Hacker News}, author = {PRODAFT}, What is interesting and different from the other families is that SharkBot likely uses ATS to also bypass multi-factor authentication mechanisms, including behavioral detection like bio-metrics, while at the same time it also includes more classic features to steal users credentials. NCC Groups Threat Intelligence team continues analysis of SharkBot and uncovering new findings. date = {2022-05-13}, This new wave of malware, which started in August 2021, includes also other families like Gustuff and Anatsa. To make themselves even more difficult to detect, the actors behind these dropper apps only manually activate the installation of the banking trojan on an infected device in case they desire more victims in a specific region of the world. To achieve this, criminals use a multitude of techniques, which range from location checks to incremental malicious updates, passing by time-based de-obfuscation and server-side emulation checks. url = {https://www.threatfabric.com/blogs/smishing-campaign-in-nl-spreading-cabassous-and-anatsa.html}, Within the Threat Intelligence team of NCC Group were looking closely to several of these malware families to provide valuable information to our customers about these threats. }, Tweet: new version of Teabot targeting also Portugal banks, @techreport{prodaft:20210716:toddler:5fd814e, These permissions allows Android banking malware to intercept all the accessibility events produced by the interaction of the user with the User Interface, including button presses, touches, TextField changes (useful for the keylogging features), etc. These include apps that posed as QR code scanners, PDF scanners and cryptocurrency apps, all of which deliver the malware. NCC Group, as well as many other researchers noticed a rise in Android malware last year, especially Android banking malware. The second most prolific of the malware families detailed by researchers at ThreatFabric is Alien,an Android banking trojanthat can also steal two-factor authentication capabilities and which has been active for over a year. This malicious dropper is published in the Google Play Store as a fake Antivirus, which really has two main goals (and commands to receive from C2): With this command, the app installed from the Google Play Store is able to install and enable Accessibility Permissions for the fully featured SharkBot sample it downloaded. The device manufacturers are continually releasing various security patches and Android updates in order to fix errors and bugs that can be abused by cyber criminals. Anatsa was discovered by ThreatFabric in January 2021. Chrome "Managed By Your Organization" Browser Hijacker (Windows), Your iPhone Has Been Hacked POP-UP Scam (Mac). Scroll down until you see "Data usage" and select this option.
This is probably one of the reasons ATS isnt that popular amongst (Android) banking malware. Android banking trojan actors have taken this stratagem to heart and have been very adaptable over years to new Google Play app store restrictions introduced to limit their operations. Performing a "Factory Reset" is a good way to remove all unwanted applications, restore system's settings to default and clean the device in general. date = {2022-03-01}, This dropper also does not request Accessibility Service privileges, it just requests permission to install packages, spiced with the promise to install new workout exercises - to entice the user to grant this permission. Ignore suspicious SMS messages and irrelevant emails received from unknown addresses that contain links or attachments. organization = {ThreatFabric}, Actors behind it took care of making their apps look legitimate and useful.
One of these is a gym and fitness training app that comes with a supporting website designed to enhance the legitimacy, but close inspection of the site reveals placeholder text all over it. See the IoCs section below for the Google Play Store URLs of the newly discovered SharkBot dropper apps. urldate = {2021-05-19} With these numbers in mind, it is fair to say that this dropper family was likely able to infect hundreds of thousands of victims during its operation. date = {2021-05-05}, How to install the latest software updates? The small malicious footprint is a result of the new Google Play restrictions (current and planned) to put limitations on the use of privacy concerning app permissions. Push the "Power" button and hold it until you see the "Power off" screen. The malware has received 95,000 installations via malicious apps in the Play Store. Just like previously observed, this dropper tried to convince victims to install a fake update. Scroll down until you see "Reset" and tap it. The "Safe Mode" in Android operating system temporarily disables all third-party applications from running. Upon the start of the app, a service is started to check if the update was installed. Increased attack rate of infections detected within the last 24 hours. Your suggestion will be reviewed before being published. After the user clicks OK, the dropper will request the permissions needed. urldate = {2021-06-09} institution = {Buguroo}, This technique also allows adversaries to scale up their operations with minimum effort. Do not use third-party downloaders and platforms, shady pages, and other sources of this kind to download any apps. Do not click on ads appearing on shady websites. This malware is most likely to be used to access banking apps. language = {English}, }, @online{s:20220303:teabot:6b49183, author = {Cleafy}, In November 2021 ThreatFabric analysts discovered yet another dropper in Google Play. This will remove permissions granted for these websites to deliver notifications. In the first case, we observed Brunhilda posing as a QR code creator app, Brunhilda dropped samples from established families, like Hydra, as well as novel ones, like Ermac. We think those values can be used in the future to identify different buyers of this malware, which based on our investigation is not being sold in underground forums yet. It uses the + operator, but since the week of the year and the year are Integers, they are added instead of appended, so for example: for the second week of 2022, the generated string to be base64 encoded is: 2 + 2022 + pojBI9LHGFdfgegjjsJ99hvVGHVOjhksdf = 2024 + pojBI9LHGFdfgegjjsJ99hvVGHVOjhksdf = 2024pojBI9LHGFdfgegjjsJ99hvVGHVOjhksdf. language = {English}, How to uninstall potentially unwanted and/or malicious applications? urldate = {2021-05-11} In this blog we will discuss the recent techniques used to spread Android banking trojans via Google Play (MITRE T1475) resulting in significant financial loss for targeted banks. The Cleafy blogpost stated that the main goal of SharkBot is to initiate money transfers (from compromised devices) via Automatic Transfer Systems (ATS). To ensure that our managed services remain effective against the latest threats, NCC Group operates a Global Fusion Center with Fox-IT at its core. Note that some malicious applications might be designed to operate when the device is connected to wireless network only.
After the initial download, users are forced to update the app to continue using it it's this update that connects to a command and control server and downloads the Anatsa payload onto the device, providing attackers with the means to steal banking details and other information. It can also perform classic overlay attacks in order to steal credentials, accessibility logging (capturing everything shown on the users screen), and keylogging. This consideration is confirmed by the very low overall VirusTotal score of the 9 number of droppers we have investigated in this blogpost. To summarize ATS can be compared with webinject, only serving a different purpose. As far as we observed, this technique is an advanced attack technique which isnt used regularly within Android malware. Note that resetting the browser will eliminate all data stored within. The ATS features allow the malware to receive a list of events to be simulated, and them will be simulated in order to do the money transfers. You have just 15 minutes after a bug is disclosed, Pretty much everyone wants a 4-day work week, Planning to quit your job? url = {https://twitter.com/_icebre4ker_/status/1416409813467156482}, language = {English}, During the research dedicated to the distribution techniques of different malware families, our analysts found numerous droppers located in Google Play, designed to distribute specifically the banking trojan Anatsa. Scroll down until you see a potentially unwanted and/or malicious application, select it and tap "Uninstall". language = {English}, }, Threat Actors Use Mockups of Popular Apps to Spread Teabot and Flubot Malware on Android, @online{threatfabric:20210519:anatsa:b359430, With this feature, the C2 can provide as message to the malware which will be used to automatically reply the incoming notifications received in the infected device. Tap "Battery" and check the usage of each application. url = {https://labs.k7computing.com/?p=22407}, What makes these Google Play distribution campaigns very difficult to detect from an automation (sandbox) and machine learning perspective is that dropper apps all have a very small malicious footprint. title = {{Teabot}},
This SharkBot version, which we can call SharkBotDropper is mainly used to download a fully featured SharkBot from the C2 server, which will be installed by using the Automatic Transfer System (ATS) (simulating click and touches with the Accessibility permissions). SharkBot can receive different commands from the C2 server in order to execute different actions in the infected device such as sending text messages, download files, show injections, etc. urldate = {2022-03-22} This multidisciplinary team converts our leading cyber threat intelligence into powerful detection strategies. Malware can have different capabilities. Privacy policy | Site Disclaimer | Terms of use | About us | Contact us | Search this website, This website uses cookies to ensure you get the best experience on our website. We detected the SharkBot reduced version published in the Google Play on 28th February, but the last update was on 10th February, so the app has been published for some time now. date = {2021-06-01}, Any redistribution or reproduction of part or all of the contents in any form is prohibited. }, New FluBot and TeaBot Global Malware Campaigns Discovered, @online{threatfabric:202111:deceive:ec55fb1, These restrictions include setting limitations on the use of certain (dangerous) app permissions, which play a big role in distributing or automating malware tactics.
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