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Android.Smspacem

Risk Level 1: Very Low

Discovered:
May 22, 2011
Updated:
May 23, 2011 10:13:22 AM
Type:
Trojan
Infection Length:
1,855,053 bytes
Systems Affected:
Android
When the Trojan executes, it checks the current date on the device. Depending on the date, the Trojan may modify the wallpaper to different images.

If the date is May 21st, 2011, the Trojan may then send one of following SMS messages to all contacts in the address book:
  • Cannot talk right now, the world is about to end
  • Es el fin del mundo
  • Its the Raptures,praise Jebus
  • Jebus is way over due for a come back
  • Just saw the four horsemen of the apocalypse and man did they have the worst case of road rage
  • Prepare to meet thy maker,make sure to hedge your bet just in case the Muslims\u2019 were right


If the date is May 22nd, 2011, it sends the following SMS message to all contacts in the address book:
Looks like Jebus is a no show, maybe Judaism was on to something

If the date is neither May 21st or 22nd, the Trojan contacts the following location using SOAP:
[http://]biofaction.no-ip.biz/talkto[REMOVED]

The Trojan may then receive commands to perform further operations on the device.

It may send the following SMS message to all contacts in the address book:
You have to download this and thank me later
[URL]

Where [URL] is one of following locations:
  • [http://]turbobit.net/3qijra41[REMOVED]
  • [http://]turbobit.net/9c19sk0t[REMOVED]
  • [http://]turbobit.net/9fzlltk2[REMOVED]


If the compromised device receives the following SMS message, it deletes all SMS messages in the phone from that sender:
health

The Trojan may also send the following SMS messages from the device:
  • Cannot talk right now, the world is about to end
  • Es el fin del mundo
  • I am infected and alive ver 1.00
  • Its the Raptures,praise Jebus
  • Jebus is way over due for a come back
  • Just saw the four horsemen of the apocalypse and man did they have the worst case of road rage
  • Prepare to meet thy maker, make sure to hedge your bet just in case the Muslims were right

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: Kaoru Hayashi
Summary| Technical Details| Removal

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