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Trojan-Downloader:W32/Agent.IDO

Name : Trojan-Downloader:W32/Agent.IDO
Category:Malware
Type:Trojan-Downloader
Platform:W32

Summary

This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

Additional Details

The trojan-downloader Agent.IDO drops the following files onto the system:

  • %windir%\system32\win.exe
  • %ProgramFiles%\Microsoft Commom\svchost.exe

The svchost.exe file is detected as Trojan-Downloader:W32/Agent.IDP.


Payload

The downloading component of this trojan-downloader is actually another malware, Agent.IDP, which is part of its payload.

Once dropped, Agent.IDP adds the following autorun key to the Windows registry, so that it will run at each subsequent startup:

  • Key: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer
Value: Debugger
Data: %Program Files%\Microsoft Common\svchost.exe

When executed, Agent.IDP attempts to connect to the following websites:

  • http://univnext.cn/ld.php?v=1&rs=[...]=1&uid=1
  •  http://218.93.202.102/ld.php?v=1&rs=[...]=1&uid=1
  •  http://whv67.cn/ld.php?v=1&rs=[...]=1&uid=1

Fortunately, these websites are currently not operational.