Backdoor:OSX/Olyx.B

Classification

Category :

Malware

Type :

Backdoor

Aliases :

Backdoor:OSX/Olyx.B, Mac.OSX.Trojan.Lamadai.A

Summary

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

Removal

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

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

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Technical 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

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