Win32/Kivars [Threat Name] go to Threat

Win32/Kivars.A [Threat Variant Name]

Category trojan
Size 19968 B
Detection created Jul 08, 2014
Detection database version 10065
Aliases Trojan:Win32/Malagent!gmb (Microsoft)
  Trojan.Gen (Symantec)
  Trojan.Dropper.SCK (BitDefender)
Short description

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


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

  • %commonappdata%\­Kavirs.exe

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

  • [HKEY_LOCAL_MACHINE\­SOFTWARE\­Microsoft\­CurrentVersion\­Run]
    • "Kavirs" = "%commonappdata%\­Kavirs.exe"

The trojan executes the following files:

  • C:\­Program Files\­Internet Explorer\­iexplore.exe
  • %programfiles%\­Internet Explorer\­iexplore.exe

The trojan creates and runs a new thread with its own code within these running processes.

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

Information stealing

The trojan collects the following information:

  • computer name
  • user name
  • MAC address

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

Other information

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

The trojan contains a list of (2) URLs. The HTTP protocol is used.

It can execute the following operations:

  • download files from a remote computer and/or the Internet
  • run executable files
  • update itself to a newer version
  • uninstall itself
  • the path to specific folders
  • send the list of disk devices and their type to a remote computer
  • send the list of files on a specific drive to a remote computer
  • send requested files

The trojan keeps various information in the following Registry key:

  • [HKEY_CURRENT_USER\­Console\­InstallModule]

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