Category :


Type :


Aliases :

Backdoor:OSX/Sabpab.A, MAC.OSX.Trojan.Lamadai.B


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


  1. Open Activity Monitor, select, and click Quit Process.
  2. Open Terminal, then execute the following:
    • rm ~/Library/Preferences/
    • rm ~/Library/LaunchAgents/

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:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details


Sabpab.A is dropped into the system by malicious Java applets that exploit the vulnerability identified by CVE-2012-0507, and malicious Word documents that exploit CVE-2009-0563.


The malware drops the following copy of itself:

  • ~/Library/Preferences/

It creates the following launchpoint for the file above:

  • ~/Library/LaunchAgents/


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:

  • rtx556[...][...]
  • 199[...].192.152.100[...]

The backdoor is capable of performing the following actions:

  • Downloading and uploading files
  • Creating new processes
  • Taking screenshots