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Android.Arspam

Risk Level 1: Very Low

Discovered:
December 19, 2011
Updated:
December 19, 2011 3:32:51 PM
Type:
Trojan
Systems Affected:
Android
Installation
The Trojan arrives as a package with the following name:
com.sileria.alsalah

The Trojan will have the following name:
AlSalah






Permissions
When the Trojan is being installed, it requests permissions to perform the following actions:

  • Access location information, such as Cell-ID or WiFi.
  • Access location information, such as GPS information.
  • Access information about networks.
  • Access information about the WiFi state.
  • Collect battery statistics
  • Discover and pair with Bluetooth devices.
  • Disable the device.
  • Broadcast that a package has been removed.
  • Broadcast an SMS receipt notification.
  • Initiate a phone call without using the Phone UI or requiring confirmation from the user.
  • Call any number, without going through the Dialer UI.
  • Access the camera.
  • Change network connectivity state.
  • Change the WiFi state
  • Clear the cache of all installed applications.
  • Clear user data.
  • Enable or disable location updates from the radio.
  • Delete packages.
  • Allow access to low-level power management.
  • Access diagnostic resources.
  • Allows applications to disable the keyguard.
  • Expand and collapse the status bar
  • Run as the root user.
  • Access the flashlight
  • Access hardware peripherals.
  • Inject user events (such as key presses) into a series of events.
  • Install packages.
  • Open network connections.
  • Modify global audio settings.
  • Change the phone state, such as powering it on and off.
  • Mount, unmount, and format removable file systems on removable storage.
  • Make activities persistent
  • Monitor, modify, or end outgoing calls.
  • Read the calendar.
  • Read contact data.
  • Take screenshots
  • Allow access to low-level system logs.
  • Check the phone's current state.
  • Read SMS messages on the device.
  • Reboot the device.
  • Start once the device has finished booting.
  • Monitor incoming MMS messages.
  • Monitor incoming SMS messages.
  • Monitor incoming WAP push notifications.
  • Use the device's mic to record audio.
  • Send SMS messages.
  • Control how activities are started globally on the system.
  • Configure for debugging.
  • Set the rotation of the screen.
  • Set the time zone.
  • Change the background wallpaper and wallpaper hints.
  • Open, close, and disable the status bar.
  • Display system windows.
  • Make the phone vibrate.
  • Prevent processor from sleeping or screen from dimming.
  • Allows applications to write the apn settings.
  • Write to the calendar.
  • Create new contact data.
  • Write to external storage devices.
  • Read or write to the system settings.
  • Create new SMS messages.


Functionality
The Trojan will gather the contacts on the compromised device and send each one one of the following URLs:

  • [http://]www.dhofaralaezz.com/vb/showthr[REMOVED]
  • [http://]www.i7sastok.com/vb/showthr[REMOVED]
  • [http://]www.dmahgareb.com/vb/showthr[REMOVED]
  • [http://]mafia.clubme.net/t2139[REMOVED]
  • [http://]www.4pal.net/vb/showthr[REMOVED]
  • [http://]www.howwari.com/vb/showthr[REMOVED]
  • [http://]forum.te3p.com/46461[REMOVED]
  • [http://]www.htoof.com/vb/t18739[REMOVED]
  • [http://]vb.roooo3.com/showthr[REMOVED]
  • [http://]www.alsa7ab.com/vb/showthr[REMOVED]
  • [http://]www.riyadhmoon.com/vb/showthr[REMOVED]
  • [http://]forum.althuibi.com/showthr[REMOVED]
  • [http://]www.2wx2.com/vb/showthr[REMOVED]
  • [http://]www.mdmak.com/vb/showpo[REMOVED]
  • [http://]www.too-8.com/vb/showthr[REMOVED]
  • [http://]www.3z1z.com/vb/showthr[REMOVED]
  • [http://]www.w32w.com/vb/showpo[REMOVED]
  • [http://]forum.65man.com/65man33[REMOVED]

If the device's SIM card is from Bahrain, it will download the following file:
[http://]www.alwasatnews.com/data/2011/3382/BICIrepo[REMOVED]

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: Beannie Cai
Summary| Technical Details| Removal

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