HKCert
Security Blog

Hong Kong Google Play Store's Apps Security Risk Report (July 2016)

Release Date: 29 / 07 / 2016
Last Update: 29 / 07 / 2016

 

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 July, we have downloaded 136 apps from Play Store, where 4 apps have been identified as high risk. None of them were removed from Play Store (on or before 27-July). 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: 136 apps
  • Unable to download via the system: 64 apps
  • Downloaded date: 7-July 2016
  • List of the downloaded apps: "Appendix 1" [download]

 

Analysis Overview

 

In this analysis, 136 apps were scanned for bad behaviors. 4 apps were identified as security 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) ► MultiCraft ― Free Miner!    (v1.1.3.1)


Category:  Top Free Game
Installs: 10,000,000+

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

8/53 [Link]

Available on play store

2) Ice Cream & Smoothies    (v8.8.7.20)

Category: New Free App, Top Free Game
Installs: 100,000+

  • obtain SIM operator name
  • obtain SIM serial number
  • obtain SIM status
  • obtain geo-location information
  • obtain WiFi configuration
  • obtain device information
  • obtain installed software information.

3 / 52 [Link]

Available on play store

3)死神:斬之靈(官方正版授權手遊)    (v1.1.8)

Category: New Free App,Top Free Game, New Free Game
Installs: 100,000+
 

  • obtain SIM operator name
  • obtain geo-location information
  • obtain WiFi configuration
  • obtain device information
  • obtain installed software information.

7 / 54 [Link]

Available on play store

4) 魔王與公主    (v1.0.6)

Category: Top Free App,Top Free Game
Installs: 50,000+

  • obtain SIM operator name
  • obtain geo-location information
  • obtain WiFi configuration
  • obtain device information
  • read phone number
  • obtain installed software information

4 / 54 [Link]

Available on play store

 Remark (#): The status was checked on 27-July. There is no direct relation between the on-shelf status and this report.

 

2.    High risk app analysis


Please refer to "Appendix 2" [download]