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

Release Date: 31 / 03 / 2016
Last Update: 31 / 03 / 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 February, we have downloaded 178 apps from Play Store, where 5 apps have been identified as high risk. None of them were removed from Play Store (on or before 30-Mar). 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: 178 apps
  • Unable to download via the system: 22 apps
  • Downloaded date: 5-March 2016
  • List of the downloaded apps: "Appendix 1" [download]

 

Analysis Overview

 

In this analysis, 178 apps were scanned for bad behaviors. 5 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) 呂布全壘打 逗趣武將   (v1.4.9)

Category: New Free App, New Free Game

Installs: 0+
  • obtain SIM operator name
  • obtain SIM status
  • obtain device information
  • obtain geo-location information
  • connect to the Internet
  • send out phone information

5 / 56 [Link]

Available on play store

2) 夢之國度-樂曈甜美代言   (v1.0.0)

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

  • obtain SIM operator name
  • obtain SIM serial number
  • obtain SIM status
  • obtain geo-location information
  • obtain installed software information
  • connect to the Internet

2 / 56 [Link]

Available on play store

3) 591房屋交易(香港),麥玲玲助陣,租屋、買樓、放盤就係快!   (v1.10.1)

Category: Top Free App
Installs: 10,000+

  • obtain geo-location information
  • connect to the Internet
  • obtain SIM serial number
  • obtain device information
  • send out phone information
  • obtain SIM operator name

7 / 56 [Link]

Available on play store

4) 斬魄之靈-斬魄刀!卍解!   (v1.0.2)

Category: New Free App, New Free Game
Installs: 5+

  • obtain WiFi configuration
  • read phone number
  • obtain geo-location information
  • connect to the Internet
  • obtain device information

12 / 56 [Link]

Available on play store

5) 热血街霸 - 新马版   (v1.10.0)

Category: New Free App, New Free Game
Installs: 1,000+

  • obtain SIM operator name
  • obtain SIM serial number
  • obtain SIM status
  • read phone number
  • obtain geo-location information
  • connect to the Internet

12 / 56 [Link]

Available on play store

Remark (#): The status was checked on 30-Mar. There is no direct relation between the on-shelf status and this report.

 

2. High risk app analysis

 

Please refer to "Appendix 2" [download]