Win32/TrojanProxy.Agent.NFT [Threat Name] go to Threat

Win32/TrojanProxy.Agent.NFT [Threat Variant Name]

Category trojan
Size 17920 B
Detection created Oct 12, 2009
Detection database version 4499
Aliases Trojan.Win32.Agent2.kjo (Kaspersky)
  Spammer:Win32/Tedroo.I (Microsoft)
  Win32:Tedroo-B (Avast)
Short description

The trojan serves as a proxy server.


When executed, the trojan copies itself into the following location:

  • %windir%\­winlogon.exe

The file is then executed.

In order to be executed on every system start, the trojan sets the following Registry entry:

  • [HKEY_LOCAL_MACHINE\­Software\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "runwinlogon" = "%windir%\­winlogon.exe"

The following Registry entries are set:

  • [HKEY_LOCAL_MACHINE\­Software\­Microsoft\­Windows\­CurrentVersion\­Winlogon]
    • "Die" = "false"
    • "DieExceptPid" = "%malwarepid%"
  • [HKEY_LOCAL_MACHINE\­SYSTEM\­CurrentControlSet\­Services\­SharedAccess]
    • "Start" = 4
  • [HKEY_LOCAL_MACHINE\­SYSTEM\­CurrentControlSet\­Services\­wscsvc]
    • "Start" = 4
  • [HKEY_LOCAL_MACHINE\­Software\­Microsoft\­Security Center]
    • "FirewallDisableNotify" = 1
    • "FirewallOverride" = 1
  • [HKEY_LOCAL_MACHINE\­Software\­Policies\­Microsoft\­WindowsFirewall\­DomainProfile]
    • "EnableFirewall" = 0
  • [HKEY_LOCAL_MACHINE\­Software\­Policies\­Microsoft\­WindowsFirewall\­StandardProfile]
    • "EnableFirewall" = 0
  • [HKEY_LOCAL_MACHINE\­Software\­Microsoft\­Windows\­CurrentVersion\­winlogon]
    • "del" = "%originalmalwarefilepath%"

The following services are disabled:

  • Windows Firewall
  • Windows Security Center

The trojan executes the following commands:

  • netsh firewall add allowedprogram %windir%\­winlogon.exe ENABLE

The performed command creates an exception in the Windows Firewall.

After the installation is complete, the trojan deletes the original executable file.

Other information

The trojan serves as a proxy server. A HTTP, DNS, TCP proxy is listening there.

It can execute the following operations:

  • redirect network traffic
  • block access to specific websites

The trojan acquires data and commands from a remote computer or the Internet.

The trojan contains a list of URLs. The HTTP protocol is used.

It can execute the following operations:

  • remove itself from the infected computer
  • download files from a remote computer and/or the Internet
  • run executable files
  • set up a proxy server

The trojan opens a random TCP port.

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