HKCert
Security Blog

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

Release Date: 24 / 07 / 2017
Last Update: 24 / 07 / 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 Jul, we have downloaded 196 apps from Play Store, where 5 apps have been identified as high risk. None of them were removed from Play Store (on or before 24-Jul). 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: 196 apps
  • Unable to download via the system: 4 apps
  • Downloaded date: 04-Jul, 2017
  • List of the downloaded apps: "Appendix 1" [download]

 

Analysis Overview

 

In this analysis, 196 apps were scanned for bad behaviors. 5 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) Roll the Ball:滑動拼圖 (ver. 1.7.8)

Category: Top Free Game

Installs: 50,000,000+


 

 

  • obtain device information
  • connect to the Internet
  • obtain network information
  • obtain device information
  • send out phone information

03 / 59 [Link]

Available on play store

2) 茄子快傳--傳輸&分享 (ver. 3.8.18_ww)

Category: Top Free App

Installs: 100,000,000+


 

 

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

02 / 61 [Link]

Available on play store

3) 茄子换机 (ver. 2.0.8_ww)

Category: Top Free App

Installs: 5,000,000+

 

  • obtain SIM operator name
  • obtain SIM status
  • read phone number
  • obtain geo-location information
  • obtain network information
  • obtain device information

03 / 61 [Link]

Available on play store

4) 塊寶石拼圖 (ver. 20)

Category: Top Free Game

Installs: 10,000,000+


 

  • obtain SIM operator name
  • obtain SIM serial number
  • obtain SIM status
  • read phone number
  • obtain geo-location information
  • obtain network information
  • obtain device information

06 / 61 [Link]

Available on play store

5) spinner.io onlinе multiplayer (ver. 1.2.0)

Category: Top Free Game, New Free Game

Installs: 100,000+


 

  • obtain SIM operator name
  • obtain geo-location information
  • obtain network information
  • obtain device information
  • send out phone information

05 / 62 [Link]

Available on play store

 Remark (#): The status was checked on 24-Jul. There is no direct relation between the on-shelf status and this report.

 

2.    High risk app analysis


Please refer to "Appendix 2" [download]