Trojan:Android/FakeRegSMS
Summary
Trojan:Android/FakeRegSMS appears to be an installer; on execution however it silently signs up the user for a SMS-subscription based service.
Removal
Once the scan is complete, the F-Secure security product will ask if you want to uninstall the file, move it to the quarantine or keep it installed on your device.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
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Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
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Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
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Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
The variants in the FakeRegSMS malware family appear to be installers; on execution however, no application are installed and the user is instead silently signed up for a SMS-subscription based service.
During installation, the Trojans request for permissions that will allow the following actions:
- Modifying SD card contents
- Sending out SMS messages
- Reading the device.s information
The FakeRegSMS.B variants utilizes a pseudo-cryptic technique to conceal information in a PNG image file. The same image is used as the icon, and it becomes visible during and after the installation.
Variants
- Trojan:Android/FakeRegSMS.A
- Trojan:Android/FakeRegSMS.B
More
This malware is discussed in further detail in: Q1 2012 Mobile Threat Report (PDF).
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