JS/Twettir

This page shows details and results of our analysis on the malware JS/Twettir

Download Current DAT: 6609

Threat Detail

Malware Type: Internet Worm

Malware Sub-type: JavaScript

Discovery Date: 2009-04-12

Next Steps:

Overview
Characteristics
Symptoms
Method of Infection
Removal

Overview

-- Update April 13, 2009 --
The risk assessment of this threat has been updated to Low-Profiled due to media attention at:
http://news.cnet.com/8301-1009_3-10217684-83.html

JS/Twettir is the detection for a JavaScript that exploits a cross site scripting vulnerability in Twitter to infect other user profiles.

Minimum DAT

5583 (2009-04-13)

Updated DAT

5891 (2010-02-13)

Minimum Engine

5.2.00

File Length

Varies

Description Added

2009-04-12

Description Modified

2009-04-13

Malware Proliferation

Characteristics

JS/Twettir is the detection for a JavaScript that exploits a cross site scripting vulnerability in Twitter to infect other user profiles.

Once an infected profile is viewed, it executes and injects a JavaScript code in the viewers profile causing them to be infected as well.

This worm sends messages to all contacts containing any of the following strings:

Dude, www.StalkDaily.com is awesome. What's the fuss?
Join www.StalkDaily.com everyone!
Woooo, www.StalkDaily.com :)
Virus!? What? www.StalkDaily.com is legit!
Wow...www.StalkDaily.com
@twitter www.StalkDaily.com
Twitter has been hacked !!!
Twitter worm, read here
StalkDaily worm on Twitter, more info
HOWTO: Remove StalkDaily.com Auto-Tweets From Your Infected Twitter Profile | Twittercism
#Stalkdaily virus runs riots on twitter. Learn how to remove it

Symptoms

Messages are sent containing the strings mentioned.

Method of Infection

Twitter profile are infected through cross site scripting when an infected profile is viewed.

Removal

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.

On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.