Analysis by: Sabrina Lei Sioting
 THREAT SUBTYPE:

Rooting Tool, Hacking/Cracking Tool

 PLATFORM:

Android OS

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: Varies
File Type: APK
Memory Resident: Yes
Initial Samples Received Date: 04 Aug 2011

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

NOTES:
This malware checks if the following files exist:

  • gingerbreak.png
  • su.png
  • superuser.png
  • install.png
If the files above exist, this malware will update the following files:
  • /data/data/eu.chainfire.gingerbreak/files/gingerbreak
  • /data/data/eu.chainfire.gingerbreak/files/su
  • data/data/eu.chainfire.gingerbreak/files/superuser.apk
  • /data/data/eu.chainfire.gingerbreak/files/install.sh
The permissions of these files are changed to executable using the command "chmod 0755" then they are exucuted. As a result, malicious routines of these files are exhibited on the system.

It steals the following information:

  • UserID

  SOLUTION

Minimum Scan Engine: 8.900
TMMS Pattern File: 1.123.00
TMMS Pattern Date: 07 Aug 2011

NOTES:

Trend Micro Mobile Security Solution

Trend Micro Mobile Security Personal Edition protects Android smartphones and tablets from malicious and Trojanized applications. The App Scanner is free and detects malicious and Trojanized apps as they are downloaded, while SmartSurfing blocks malicious websites using your device's Android browser.

Download and install the Trend Micro Mobile Security App via the Android Market.

Remove unwanted apps on your Android mobile device

To remove unwanted apps on your mobile device:

  1. Go to Settings > Applications > Manage Applications.
  2. Locate the app to be removed.
  3. Scroll and highlight the app to be removed, then choose Uninstall.


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