Home > Threat descriptions >



Category: Malware

Type: Trojan

Platform: Android

Aliases: Gidix, KRSMS-A, MisoSMS-B


Trojan:Android/Gidix.A appears to be a system settings manager application; while active however the app uploads sensitive data from the device to a remote server. It also silently sends SMS messages and monitors incoming calls and SMS messages.


Automatic action

Once the scan is complete, the F-Secure security product will prompt you to assess the file and choose to Uninstall, Quarantine or keep it installed on your device.

Knowledge Base

Find the latest advice in our Community Knowledge Base.

About the product

See the manual for your F-Secure product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

Trojan:Android/Gidix.A is distributed in the guise of a system settings manager app named adv Services. As part of the installation process, the app requests for device administrator access that can allow it to forcefully lock the device:

Trojan:Android/Gidix.A requesting device administrator access

Once installed, the app silently sends SMS messages. To disguise this activity, it also listens to incoming SMS messages and phones calls and checks their origin for the prefix +82 or 010 (possibly indicating this app was targeted to South Korean users); the app clears the call log of any matching messages or numbers.

In addition, the app silently sends the following information from the device to a remote server:

  • Recorded phone calls
  • SMS messages
  • Phone number
  • Network names

To protect itself, the app uses APKProtection obfuscation; it also contains code related to encryption and communication in a native library.