Android.Dogowar

Discovered:

August 15, 2011

Updated:

August 15, 2011 10:48:39 AM

Also Known As:

ANDROIDOS_DOOGRAW.A [Trend]

Type:

Trojan

Systems Affected:

Android

Android.Dogowar is a Trojan horse on the Android platform that send SMS texts to all contacts on the device. It is a repackaged version of a game application called Dog Wars, which can be downloaded from a third party market and must be manually installed.


Android Package Files
The Trojan generally arrives within a repackaged .apk file from a legitimate application with the following characteristics:

APK: DogWars.apk
Service Name: com.dogbite.Rabies


Permissions
When installing the Trojan, it will ask for one or more of the following permissions:

• Open network sockets
• Make the phone vibrate
  
• Read only access to phone state
• Read the user's contacts data
• Receive the broadcast message that is sent after the system finishes booting
• Send SMS messages
• Write SMS messages

Installation
When the Trojan is installed, it creates an icon with the following title:
Dog Wars - Beta

The icon has a picture of a dog and the word PETA.



Note: The icon for the legitimate application has the word BETA.

Next, the Trojan creates a service with the following name so that executes every time the device restarts:
com.dogbite.Rabies


Functionality
The Trojan sends the following message to all contacts on the device:
I take pleasure in hurting small animals, just thought you should know that

It also sends the following message to 73822:
text

Recommendations

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.