Trojan:Android/SMSFoncy variants send SMS messages to specific numbers.
Trojan:Android/SMSFoncy.A sends out SMS messages to selected phone numbers, which is determined by first obtaining the user's country code, then using that detail to send an SMS message to specific phone numbers. The SMS message sent will contain specified content.
On receiving an SMS reply to the sent SNS, the malware then sends another SMS (containing the text of the SMS reply) to another phone number.
The B variant of this malware family includes similar behavior, and also hides SMS messages received from specific numbers.
Both variants will display a fake error message while the application is running.
This malware is discussed in further detail in: Q1 2012 Mobile Threat Report (PDF).
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