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Threat Encyclopedia

OSX_OLYX.EVL

ANALYSIS BY

Roland Marco Dela Paz


ALIASES:

Backdoor:MacOS_X/Olyx.B (Microsoft)

PLATFORM:

Mac OS X

OVERALL RISK RATING:
DAMAGE POTENTIAL:
DISTRIBUTION POTENTIAL:
REPORTED INFECTION:

  • Threat Type:Backdoor

  • Destructiveness:No

  • Encrypted: No

  • In the wild: Yes

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.900.02

FIRST VSAPI PATTERN DATE:

10 Apr 2012

VSAPI OPR PATTERN File:

8.901.00

VSAPI OPR PATTERN Date:

11 Apr 2012

Step 1

Remove the malware/grayware file that dropped/downloaded OSX_OLYX.EVL

NOTES:

Step 2

Terminate the malware process. To terminate the malware process, open a Terminal window and perform the following:

  1. Enter the following command:

    ps -A

  2. In the Terminal window, search for a line similar to the following:

    {number} ?? Ss {time}
    /Library/Audio/Plug-Ins/AudioServer

    Take note of the number. This number is the malware process ID (PID)
  3. Enter the following command:

    kill {malware PID}

Step 3

Delete files dropped by this malware. To delete the autostart file, open a Terminal window and type the following command:

rm "/Library/LaunchAgents/com.apple.DockActions.plist"

rm "/Library/Audio/Plug-Ins/AudioServer"

Step 4

Scan your computer with your Trend Micro product to delete files detected as OSX_OLYX.EVL If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

To open a Terminal window, double-click Applications > Utilities > Terminal in Finder.

To close the Terminal application, press ⌘ (Command) + Q.


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