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Trojan:Android/HippoSms

Classification

Category:

Malware

Platform:

Android

Type:

Trojan

Aliases:

  • Trojan:Android/HippoSms
  • Trojan:Android/HippoSms.A

Summary

Trojan:Android/HippoSms silently sends SMS messages and deletes messages from specific, service operator-related numbers.

Removal

Technical Details

Trojan:Android/HippoSms was found being distributed in an unofficial, Chinese third party Android app market in late July, 2011.

On execution, the app sends SMS messages containing the text '=8' to numbers beginning with '10', and deletes incoming messages from numbers starting with '10' and/or '13'; both these numbers are related to mainland China-based service operators.

Services and receivers related to the trojan's activities are as follow:

  • .sms.BootReceiver
  • .sms.MessageService
  • SplashActivity
  • MessageService

HippoSms.A also writes code using ContentObserver to monitor changes in the SMS message contents and to trigger its SMS message deletion routine.

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