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  4. Backdoor:OSX/Olyx.B

Backdoor:OSX/Olyx.B

Detection Names:Backdoor:OSX/Olyx.B
MAC.OSX.Trojan.Lamadai.A
Category:Malware
Type:Backdoor
Platform:OS X

Summary

Backdoor:OSX/Olyx.B connects to a remote server to receive further instructions, without the knowledge or permission from the user.

Disinfection

Manual Removal Instructions

  1. 1. Open Activity Monitor, select AudioServer, and click Quit Process.
  2. 2. Open Terminal, then execute the followings:
    • rm /Library/Audio/Plug-Ins/AudioServer
    • rm ~/Library/LaunchAgents/com.apple.DockActions.plist

Protection

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Additional Details


Arrival

Olyx.B is dropped into the system by malicious Java applets that exploit vulnerabilities identified by CVE-2011-3544 and CVE-2012-0507.



Installation

The malware drops the following copy of itself:

  • /Library/Audio/Plug-Ins/AudioServer

It creates the following launchpoint for the file above:

  • ~/Library/LaunchAgents/com.apple.DockActions.plist


Payload

The malware connects to a remote server to obtain additional commands. The server varies between samples. As of this writing, there are two known servers:

  • dns[...].assyra.com[...]
  • avira[...].suroot.com[...]

The backdoor is capable of performing the following actions:

  • Downloading and uploading files
  • Executing shell commands


Other variants