Threat Description



Category: Malware
Platform: W32
Date Discovered: November 06, 2006
Aliases: Agent.BAO


Agent.BAO, a variant of Agent, is a Trojan. Agent.BAO downloads different trojans and backdoors and activate them on an affected system without user's approval.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

Agent.BAO is a trojan downloader. It connects to a specified site on the Internet and gets more malicious download links.

Upon execution, it drops a copy of itself from the following location:

  • %sysdir%\SVCH0ST.exe

It also creates a service with the following service name:

  • 000Kendy Demo Service

It adds the following service registry entry:

  • [HKLM\System\CurrentControlSet\Services\000Kendy Service]ImagePath=%sysdir%\svch0st.exe

It downloads a text file from the following site:


This text file contains download links of other malware.

Below is the list of some of the download sites gathered and the corresponding detection name of the downloaded files:

  •[REMOVED].exe - Packed.Win32.NSAnti.b
  •[REMOVED].exe - Trojan-PSW.Win32.Lmir.bdb
  •[REMOVED].exe - Trojan-Downloader.Win32.Small.bxa
  •[REMOVED].exe -
  •[REMOVED].exe - Trojan-PSW.Win32.Delf.fz
  •[REMOVED].exe - Backdoor.Win32.Agent.aex
  •[REMOVED].exe - Backdoor.Win32.Agent.aex
  •[REMOVED].exe - Trojan-PSW.Win32.WOW.qm
  •[REMOVED].exe -
  •[REMOVED].exe - Trojan-Dropper.Win32.Agent.ayv

Note: The download links may vary depending on the content of the downloaded text file.

Moreover, Agent.BAO also creates a file named autorun.inf in the directory where the copy of the trojan is located. This is used to automatically execute the trojan when the folder is opened.


Detection Type: PC
Database: 2006-11-06_02


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