Threat Description

Agent.BAO

Details

Aliases: Agent.BAO
Category: Malware
Malware-Downloader
Type:
Platform: W32

Summary



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.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



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:

  • http://kkpic.net/ggg/adc/[REMOVED].txt

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:

  • http://222.220.16.185/data6/j[REMOVED].exe - Packed.Win32.NSAnti.b
  • http://222.220.16.185/data6/w[REMOVED].exe - Trojan-PSW.Win32.Lmir.bdb
  • http://222.220.16.185/data6/m[REMOVED].exe - Trojan-Downloader.Win32.Small.bxa
  • http://222.220.16.185/data6/w[REMOVED].exe - Trojan-PSW.Win32.Agent.im
  • http://222.220.16.185/data6/m[REMOVED].exe - Trojan-PSW.Win32.Delf.fz
  • http://222.220.16.185/data6/j[REMOVED].exe - Backdoor.Win32.Agent.aex
  • http://222.220.16.185/data6/w[REMOVED].exe - Backdoor.Win32.Agent.aex
  • http://222.220.16.185/data6/z[REMOVED].exe - Trojan-PSW.Win32.WOW.qm
  • http://222.220.16.185/data6/q[REMOVED].exe - Trojan-PSW.Win32.QQPass.hn
  • http://222.220.16.185/data6/c[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



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




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