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This Android malware abuses premium services specially targeting China Mobile subscribers. Specifically, it includes SMS receiver that monitors SMS messsages and automatically subscribes users to premium services.
To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.
It also monitors messages that contain certain keywords that come from numbers that starts with 10658 or 10086.
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
This malware monitors the keywords 回复任意内容 and 超市 and if these are present in the body of received SMS mesages. If the said condition is met, it sends a reply containing Y as the message. This reply automatically subscribe users to premium services, without their consent.
It also monitors messages that contain any of the following keywords that come from numbers that starts with 10658 or 10086:
It then deletes the received mesage automatically once the above conditions are met.
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