Worm:OSX/Inqtana.B

Summary

OSX/Inqtana.B is a modified version of OSX/Inqtana.A that has modified startup routine so that it affects both OSX 10.4 and 10.3 that have not been patched against vulnerability CAN-2005-1333.

Inqtana.B has not been met in the wild and has internal counter that prevents it's operation after 24. February 2006. So it is unlikely that this variant would be a threat to Mac Users.

Disinfection & Removal

Patch your system by getting updates from Apple.

Delete following files

• /Users/w0rms.love.apples.tgz
• /Users/InqTest.class
• /Users/InqTest.java
• /Users/libavetanaBT.jnilib
• /Users/javax
• /Users/de
• /Users/InqTanaHandler
• /Users/InqTanaHandler.bundle
• /Users/[user name]/Library/InputManagers/aa
• /Users/[user name]/Library/InputManagers/InqTanaHandler/Info
• /Users/[user name]/Library/InputManagers/InqTanaHandler/InqTanaHandler.bundle/aa
• /Users/[user name]/Library/InputManagers/InqTanaHandler/InqTanaHandler.bundle/Contents/Info.plist
• /Users/[user name]/Library/InputManagers/InqTanaHandler/InqTanaHandler.bundle/Contents/MacOS/InqTanaHandler

Technical Details

Inqtana.B arrives to victim system as OBEX Push request, requiring user to accept the data transfer. When the transfer is done Inqtana.B uses directory traversal exploit to copy it's files so that it starts when any application is started.

Detection

Inqtana.B is detected with the following F-Secure Anti-Virus updates:

Detection Type: PC
Database: 2006-02-21_01

Description Created: Jarno Niemela, February 22, 2006
Technical Details: Gergely Erdelyi, February 22, 2006
Description Last Modified: Jarno Niemela, February 22, 2006