Win32/Poxters [Threat Name] go to Threat

Win32/Poxters.H [Threat Variant Name]

Category trojan
Size 57344 B
Aliases TR/Hijacker.Gen (Avira)
Short description

The trojan serves as a backdoor. It can be controlled remotely.


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

  • %appdata%\­%variable%\­%variable%.exe

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

  • [HKEY_LOCAL_MACHINE\­Software\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "%uuid%" = "%appdata%\­%variable%\­%variable%.exe"
  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "%uuid%" = "%appdata%\­%variable%\­%variable%.exe"
  • [HKEY_USERS\­.DEFAULT\­SOFTWARE\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "%uuid%" = "%appdata%\­%variable%\­%variable%.exe"

The following Registry entries are set:

  • [HKEY_CURRENT_USER\­Software\­Volatile Software Ltd.]
    • "Volatile" = "%uuid%"
  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows\­CurrentVersion\­Policies\­Associations]
    • "LowRiskFileTypes" = ".exe; .bat; .reg; .vbs;"
  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows\­CurrentVersion\­Internet Settings\­Zones\­0]
    • "1806" = 0
  • [HKEY_LOCAL_MACHINE\­Software\­Microsoft\­Windows\­CurrentVersion\­Internet Settings\­Zones\­0]
    • "1806" = 0

A string with variable content is used instead of %uuid%, %variable% .

Information stealing

The trojan collects the following information:

  • user name
  • computer name
  • operating system version
  • list of running processes

The trojan attempts to send gathered information to a remote machine.

Other information

The trojan creates and runs a new thread with its own program code within the following processes:

  • %programfiles%\­Internet Explorer\­iexplore.exe

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

The trojan contains a URL address. The HTTP protocol is used.

It may perform the following actions:

  • download files from a remote computer and/or the Internet
  • run executable files
  • update itself to a newer version
  • uninstall itself
  • upload files to a remote computer
  • log keystrokes

The following files may be dropped:

  • %malwarefolder%\­m.txt
  • %malwarefolder%\­m%variable1%.txt

The trojan may attempt to download files from the Internet.

The files are stored in the following locations:

  • %internetcache%\­%variable2%\­%variable2%.exe
  • %appdata%\­%variable3%\­%variable3%.exe

The file is then executed.

A string with variable content is used instead of %variable1-3% .

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