1. /
  2. Security Response/
  3. Android.Usbcleaver

Android.Usbcleaver

Risk Level 1: Very Low

Discovered:
June 20, 2013
Updated:
November 4, 2013 5:22:22 PM
Type:
Trojan
Systems Affected:
Android
Android package file
The Trojan may arrive as a package with the following characteristics:

Package name: com.novaspirit.usbcleaver


Permissions
When the Trojan is being installed, it requests permissions to perform the following actions:
  • Access information about networks
  • Open network sockets
  • Write to external storage devices


Installation
Once installed, the application will display an icon with an image of a USB logo merged with a cleaver.




Downloading
When the Trojan is executed, it downloads a .zip file from the following remote location:
[http://]www.novaspirit.com/Downloads/usbclea[REMOVED]

It then extracts the contents of the .zip file to the following location on the device:
/sdcard/usbcleaver/system

The Trojan also creates the following files:
  • /sdcard/autorun.inf
  • /sdcard/go.bat


Functionality
When the device is connected to a Windows computer that does not have autorun disabled, the Trojan then gathers information from the computer, including:
  • Default gateway
  • DNS
  • Google Chrome password
  • Host name
  • IP address
  • Microsoft Internet Explorer password
  • Mozilla Firefox password
  • Physical address
  • Subnet mask
  • WiFi password

It then stores the above information in the following location, which a remote attacker can retrieve at a later stage:
/sdcard/usbcleaver/logs/

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.
Writeup By: Zhicheng Zeng
Summary| Technical Details| Removal

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
Internet Security Threat Report, Volume 17
Symantec DeepSight Screensaver