HKCert
Security Blog

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

Release Date: 19 / 05 / 2016
Last Update: 20 / 05 / 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 November, we have downloaded 171 apps from Play Store, where 4 apps have been identified as high risk. None of them were removed from Play Store (on or before 18-May). 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: 171 apps
  • Unable to download via the system: 29 apps
  • Downloaded date: 13-May 2015
  • List of the downloaded apps: "Appendix 1" [download]

 

Analysis Overview


1.    Scanning Result
 

List of security high risk apps

 

Remark (#): The status was checked on 18-May. There is no direct relation between the on-shelf status and this report.

 

 

Application

High risk behavior description

Malware detection ratio by VirusTotal

Status #

1) Block Puzzle Jewel (v8)


Category: Top 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

9 / 56 [Link]

Available on play store

2) 全民女友 (v1.00.003)

Category: New Free App,New Free Game
Installs: 10,000+

obtain SIM operator name
obtain SIM serial number
obtain device ID
obtain geo-location information
obtain device information
read phone number.

1 / 56 [Link]

Available on play store

3)聖騎士之歌-首部曲騎士崛起 (v1.0.5)

Category: New Free App,New Free Game
Installs: 10,000+

obtain SIM operator name
obtain SIM serial number
obtain SIM status
obtain geo-location information
obtain WiFi configuration
connect to the Internet.

4 / 56 [Link]

Not Available on play store

4) 豬來了 (v2.2.3)
Category: New Free App,New Free Game

 

Installs: 1,000+

obtain SIM operator name
obtain SIM status
obtain WiFi configuration
obtain device information
connect to the Internet

1 / 56 [Link]

Available on play store

 

 

3.    High risk app analysis


Please refer to "Appendix 2" [download]