Rotexy Android Trojan Is a Hybrid Malware — Remove Active Infections
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Rotexy Android Trojan Is a Hybrid Malware — Remove Active Infections

A recent security notice reveals that a dangerous new malware has hit mobile devices — the Rotexy Android Trojan. The reason why it is deemed a critical threat is that it leads to several different types of abusive actions and is thus classified as a hybrid threat.




Rotexy Android Trojan Classified as a Hybrid and Very Dangerous Mobile Malware

The Rotexy Android Trojan has been found to spread mainly by an organized

smishing landing pages scam. This is a popular hacker tactic that relies on impersonating well-known companies or services and sends fake notifications via SMS messages. The targets will be coerced into opening up links or downloading certain applications from a repository using different typical scenarios. Popular examples are software update notifications or feature additions to the devices.

Once the Trojan code is deployed it will start the infection engine which runs these two processes:

  • Security Bypass — It will scan for any anti-virus or virtual machine hosts and disable their real-time engines. This is done in order to avoid detection.
  • Persistent Installation — The Trojan will install itself in a way which makes it very difficult to remove using manual methods. This is done by modifying system components, configuration files and boot options.

Following the successful initialization it will initiate a connection to a hacker-controlled server which will allow the criminal operators to spy on the users in real-time. The analysis shows that all correspondences and phone contacts are forwarded to the hackers in real-time.

The Rotexy Android Trojan exhibits an interesting scam tactic of enticing the victims into thinking that they have received a money transfer. They are requested to “validate” their credit card information by presenting a field. To make it look like a legitimate service it includes a credit card validation check which makes sure that the entered details are correct. As soon as they are entered correctly the details will be sent to the criminal operators.

Some configurations and samples of the Trojan have been found to also institute a lockscreen which displays a phishing page and extorts the victims to pay a “fine for viewing prohibited videos”. This is a typical scareware tactic that is often used by ransomware infections.

How To Remove Rotexy Android Infections

The security reports indicate that it is possible to remove active infections of the current configuration associated with the Rotexy Android Trojan. This means that any updates or future releases will probably use a different mechanism and will require specialist help. However taking advantage of the fact that the infected devices are controlled via SMS messages the analysts have developed a way to remove active infections.

Follow these instructions to attempt removal:

  • Send a SMS to the phone number associated with the infection with the following contents: “393838”. This will change the command and control server to an empty one and thus disconnect the connection used by the hackers.
  • Following this action send the following “3458” — this will remove the administrative privileges that are instituted on the target devices.
  • To stop the lockscreen instance send a SMS containing the “stop_blocker” string.
  • To remove the dormant Trojan restart the device in safe mode, navigate to the Applications menu page and delete it from there.

For more information, read the full analysis.

Since manually removing malicious content may erase your data, we have suggested several methods to do it effectively and safely in case you have an Android device in the step-by-step instructions below. If you want to skip these steps and remove the objects automatically, we suggest that you download an advanced privacy invasive app solution which will protect your device against any future intrusions.

Download Mobile

Mobile Detection Tool

1. Back up the data on your device

Back up the data on your phone

CAUTION! Before attempting any removals and drive formatting on your device, you should know that it is essential to save all your important contacts and files from your phone. There are several methods to backup your files:

Method I: Using online backup software or a memory card if the device supports it.

Method II: Connecting to another device and copying the data directly.

This is a bit risky option since the device may have malware on it. This is why, first you need to enter the device’s Safe Mode:

For RAZR Droid Devices:

1.Switch off the smartphone and remove the battery for a few seconds then plug it back in.

2.Switch the phone on.

3.You should see a Motorola Dual Core screen appearing. You should press and hold the Volume up, and Volume Down keys on the side of the smartphone. Hold them until the lock screen shows up with ‘Safe Mode’ written in the lower corner.

For HTC Devices:

1.Switch off the smartphone and remove the battery for a few seconds then plug it back in.

2.Turn on your phone while simultaneously holding down the Menu Button. When it starts, keep pressing the Menu Button until you see ‘Safe Mode’ menu appearing in the lower corner.

For Nexus devices:

1.Switch off the smartphone and remove the battery for a few seconds then plug it back in.
2.Turn on the phone.
3.When the welcome Logo Screen shows up, hold the trackball while pressing it until a lock screen shows up, or you see ‘Safe Mode’ written in the bottom corner.

For Other Motorola Devices:

1.Switch off the smartphone and remove the battery for a few seconds then plug it back in.
2.Hold down the Menu Button after you press it while turning on the phone. When it boots, hold the button down upon seeing the lock screen or feeling the phone vibrate.

For Moto G Devices:
1.Press the Power Button and hold it on until the list with options pop-up.
2.Hold the Power off button and wait for a ‘Reboot to Safe Mode’ option to appear.
3.Tap it and let the phone reset.

For Samsung Galaxy Devices:

1.While the device is on, hold down the Power Button and wait for the Options List.
2.Wait for a ‘Restart to Safe Mode’ option to appear.
3.Choose this setting. The device will restart.

For Apple Devices:

1. While your device is locked, hold down the Power Button and the Home Button until you see a white Apple logo.
2. Once you see the logo, let go from those buttons and start holding the Volume Up button. (Give it a little time to boot up)
3. Now the phone should boot in Safe Mode without any third-parties running.

And now it is time to proceed by doing the actual backup:

Android

1. Connect your device via USB to a computer and select Use as a Media Device. You may also see use as file transfer option.
2. Go to your phone from My Computer and copy all the files you need.
3. If the phone has an option to install its drivers onto your computer, select it and install them since this will simplify the process of copying your contact list on your computer.

2. Hard-reset your device and remove Rotexy Android Trojan

Hard-Reset Your Smartphone

For Android Devices:

After you have backed up your files, you should perform a clean wipe-out of your phone. This can happen either via one of the options in Safe Mode or by entering your device’s Recovery Mode. Several methods exist in order to enter Recovery Mode of your device:

reboot-system

For Nexus Devices: – Hold the Volume Down + Volume Up + Power button until a Recovery menu appears. After that, you should select the Wipe Data/Factory reset option. Nexus 4 may work with Volume Up + Power + Volume Down.

For Samsung Devices: – Hold the Volume Up + Power Button + Home Button until a Recovery menu appears. After that, you should select the Wipe Data/Factory reset option.

For Motorola Droid X Devices: Hold the Home Button + Power Button until a Recovery menu appears. After that, you should select the Wipe Data/Factory reset setting.

For other devices with camera buttons on them: Hold the Volume Up + Camera Button until a Recovery Menu appears. After this, you should choose the Wipe Data/Factory reset option.

Also in case you have backed up your device in a Google Account, you will be able to restore your data after a complete wipe-out by just logging into your Google Account with you email and password.

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Martin Beltov

Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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