1. Symantec/
  2. Security Response/
  3. Android.Roidsec


Risk Level 1: Very Low

May 19, 2013
May 20, 2013 10:39:05 PM
Infection Length:
Systems Affected:
Android package file
The Trojan may arrive as a package with the following characteristics:

Package name: cn.phoneSync
Version: 1.0.7
Name: wifi signal Fix

When the Trojan is being installed, it requests permissions to perform the following actions:
  • Use the device's mic to record audio.
  • Open network connections.
  • Check the phone's current state.
  • Start once the device has finished booting.
  • Read user's contacts data.
  • Read SMS messages on the device.
  • Send SMS messages.
  • Initiate a phone call without using the Phone UI or requiring confirmation from the user.
  • Access location information, such as Cell-ID or WiFi.
  • Access location information, such as GPS information.
  • Write to external storage devices.
  • Access information about the WiFi state.
  • Change WiFi connectivity state.
  • Prevent processor from sleeping or screen from dimming.
  • Read or write to the system settings.
  • Read or write the secure system settings.
  • Mount and unmount file systems for removable storage.
  • Access information about currently or recently run tasks.

Once installed, the application will have no launcher.

The Trojan collects the following information from the compromised computer:
  • Sends SMS messages
  • Forces the phone to stay on
  • Collect call log
  • Collect contacts
  • Collect installed apps
  • Collect GPS location
  • Collect memory size available on phone memory
  • Collect SD memory size available
  • List all files on SD with timestamps
  • Collect incoming SMS messages
  • Collect outgoing SMS messages
  • List of apps currently running
  • Collect total amount of RAM
  • Status of WiFi being on or off
  • List all files on phone memory with timestamps
  • Deletes files on SD card

The Trojan then sends the collected information to the following remote location:


Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.
Writeup By: Tommy Dong
Summary| Technical Details| Removal

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