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Backdoor:OSX/Olyx.B

First posted on 22 July 2013.
Source: F-Secure

Aliases :

Backdoor:OSX/Olyx.B is also known as Backdoor:OSX/Olyx.B Mac.OSX.Trojan.Lamadai.A.

Explanation :

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

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

Backdoor:OSX/Olyx.A Backdoor:OSX/Olyx.C

Last update 22 July 2013

 

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