Threat Explorer

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OSX.Tored@mm

OSX.Tored@mm

Discovered:
05 May 2009
Updated:
11 May 2009
Also Known As:
OSX_TORED.D [Trend]
Infection Length:
2,236,384 bytes
Systems Affected:
Mac
OSX.Tored@mm is a worm that attempts to spread through network shares and by email. It also opens a back door on the compromised computer.

Antivirus Protection Dates

  • Initial Rapid Release version 05 May 2009 revision 019
  • Latest Rapid Release version 31 May 2016 revision 036
  • Initial Daily Certified version 05 May 2009 revision 022
  • Latest Daily Certified version 01 June 2016 revision 005
  • Initial Weekly Certified release date 06 May 2009
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Once executed, the worm copies itself to a random location as the following file:
[RANDOM FILE NAME]

The worm then copies itself to the following folder so that it runs whenever OS X starts:
/System/Library/StartupItems

The worm opens a back door and listens for the following remote commands:
  • ddos.off
  • ddos.on
  • log.start
  • log.stop
  • navigate
  • spam.off
  • spam.on


Once open, the back door allows a remote attacker to perform the following actions on the compromised computer:
  • Participate in distributed denial of service attacks
  • Log keystrokes


It attempts to email itself to addresses gathered from the address book on the compromised computer. The threat uses one of two formats for the email.

First Format:
From: AppleFu[RANDOM LETTERS]cker@mail.[RANDOM LETTERS]

Subject: For Mac OS X! :(If you are not on Mac please transfer this mail to a Mac and sorry for our fault :)

Message Body:

The body is formed is created by joining one string from each of the following groups:
First group:
  • Hi
  • Hey
  • Hello
  • y0
  • Yo
  • Selem alaykom
  • Friend ! :) ,
Second group:
  • friend
  • dude
  • man
  • you
Third group:
  • fucky :D , just kidding,so
  • wassup ?
  • how it is going
  • I missed you ! ^^
  • what is up there?
  • what is new ?
  • how are you
  • sup?
Fourth group:
  • Traducting and decrypting message .... :
  • Traducting and decrypting message .... :Sir , Your Text !
  • Traducting and decrypting message .... :Error For Sending ,It Is Important to Get Your Data
  • Traducting and decrypting message .... :Chek It
  • Traducting and decrypting message .... :Crypted Message Has Been An Attachement , To Chek Your Message , Chek Your Attchement
  • Traducting and decrypting message .... :Check
  • Traducting and decrypting message .... :Your Identidie Has Been ....Chek Attchement For More Information
  • Traducting and decrypting message .... :You Has Been Comprimased , updating tools are as an attachement !
  • Traducting and decrypting message .... :Credi Money Has Been Sent As A Binary File for thanks for the updating, Chek
  • Traducting and decrypting message .... :New update tools
  • Traducting and decrypting message .... :Chek your update application !
  • Traducting and decrypting message .... :Your information was ...

Second Format:
From:
One of the following:
  • br@fh.tn
  • av@av.tn
  • fucker@fuck.fu
  • ser@jhfd.it
  • Ma@ry.am
  • apple@service.tn
Subject:
One of the following:
  • Hi , Chek
  • Sir , Your Text !
  • Error For Sending ,It Is Important to Get Your Data
  • Crypted Message Has Been An Attachement , To Chek Your Message , Chek Your Attchement
  • Check
  • Your Identidie Has Been ....Chek Attchement For More Information
  • You Has Been Comprimased , Chek !
  • Credi Money Has Been Sent As A Binary File , Chek
  • New porn tools
  • Chek your XXX application !
  • Your information was ...
Message Body:
The email contains a blank message body.

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.
The following instructions pertain to all current and recent Symantec antivirus products for Macintosh.
  1. Update the virus definitions.
  2. Run a full system scan and repair or delete all the files detected.
For specific details on each of these steps, read the following instructions.

1. To update the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the Virus Definitions (LiveUpdate).
  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the Virus Definitions (Intelligent Updater).
The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater " for detailed instructions.

2. To scan for and delete the infected files
a. Start your Norton AntiVirus for Macintosh program and make sure that it is configured to scan all the files.
b. Run a full system scan. For more information on how to do this, read the document, "How to install Norton AntiVirus for Macintosh ."
c. If any files are detected, click Repair (if available) or Delete.
Writeup By: Mario Ballano