HKCert
Security Blog

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

Release Date: 24 / 06 / 2016
Last Update: 27 / 06 / 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 June, we have downloaded 146 apps from Play Store, where 4 apps have been identified as high risk. None of them were removed from Play Store (on or before 22-June). 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: 146 apps
  • Unable to download via the system: 54 apps
  • Downloaded date: 12-June 2016
  • List of the downloaded apps: "Appendix 1" [download]

 

Analysis Overview


1.    Scanning Result
 

List of security high risk apps

 

 

 

Application

High risk behavior description

Malware detection ratio by VirusTotal

Status #

1) 總裁鬥地主-驚喜好禮免費拿不停 (v6.3.4)


Category: New Free Game
Installs: 1,000+

obtain SIM operator name

obtain SIM serial number

obtain SIM status

obtain geo-location information

obtain device information

read phone number

obtain installed software information.

7 / 55 [Link]

Available on play store

2) Boyaa Fight Landlord    (v6.4.0)

Category: Top Free Game
Installs: 1,000,000+

obtain SIM status

obtain geo-location information

obtain WiFi configuration

obtain device information

read phone number

obtain installed software information

5 / 55 [Link]

Available on play store

3)Bubble Shooter    (v7)

Category: Top Free App, 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 device information

read voice mail number

read phone number

6 / 55 [Link]

Available on play store

4) MultiCraft ― Free Miner!    (v1.1.3.1)
Category: Top Free Game
Installs: 5,000,000+

obtain SIM operator name

obtain SIM status

obtain geo-location information

obtain WiFi configuration

obtain device information

read phone number

8 / 55 [Link]

Available on play store

 

3.    High risk app analysis


Please refer to "Appendix 2" [download]