HKCert
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Hong Kong Google Play Store's Apps Security Risk Report (February 2017)

Release Date: 21 / 02 / 2017
Last Update: 21 / 02 / 2017

 

Hong Kong Computer Emergency Response Team (HKCERT) Coordination Centre cooperates with the National Computer Network Emergency Response Technical Team of China (CNCERT) for detecting malicious and suspicious behaviors of Apps from the Google Play Store, in order to study the security risk of apps in the Google Play Store in Hong Kong area. CNCERT provides us analyzed result, and we collate the detection result and publish security alerts to the public.

In the report of February, we have downloaded 139 apps from Play Store, where 4 apps have been identified as high risk. 1 of them were removed from Play Store (on or before 21-February). The detail of report is shown as follow.

Target scope

  • Top 50 Free Applications in Hong Kong area
  • Top 50 New Free Applications in Hong Kong area
  • Top 50 Free Games in Hong Kong area
  • Top 50 New Free Games in Hong Kong area


Scanned Apps

  • Successful downloaded and scanned: 139 apps
  • Unable to download via the system: 61 apps
  • Downloaded date: 05-February 2017
  • List of the downloaded apps: "Appendix 1" [download]

 

Analysis Overview

 

In this analysis, 139 apps were scanned for bad behaviors. 4 apps were identified as high risk. Based on the level of security threat, the following apps listed below are defined as high risk apps, which refers to apps having behavior, which could cause direct harm to systems and users' interests.


1.    Scanning Result
 

List of security high risk apps

 

Application

High risk behavior description

Malware detection ratio by VirusTotal

Status #

1) Hidden my game by mom (v1.0.1)

Category: Top Free Game

Installs: 1,000,000+


 

 

  • obtain device information
  • obtain geo-location information
  • send out phone information
  • obtain network information

2 / 56 [Link]

Available on play store

2) Mp3 Music Download (v3)

Category: New Free Game

Installs: 10,000+


 

 

  • obtain device information (IMEI)
  • obtain geo-location information
  • obtain SIM operator name
  • obtain SIM status
  • obtain network information

6 / 57 [Link]

Not available on play store#

3) 陰陽師Onmyoji - 和風幻想RPG (v1.0.13)

Category: Top Free App, Top Free Game

Installs: 500,000+

 

  • obtain device information (IMEI)
  • obtain geo-location information
  • obtain SIM serial number
  • obtain SIM status
  • obtain network information

10 / 58 [Link]

Available on play store

4) Stickman escape lift (v1.0.1)

Category: New Free Game

Installs: 100,000+


 

  • obtain geo-location information
  • obtain SIM operator name
  • obtain SIM status
  • obtain network information

10 / 58 [Link]

Available on play store

 Remark (#): The status was checked on 21-February. There is no direct relation between the on-shelf status and this report.

 

2.    High risk app analysis


Please refer to "Appendix 2" [download]