Win32/Robobot [Threat Name]

Detection created2005-01-17
World activity peak 2008-03-25 (0.01 %)
Short description

The trojan serves as a backdoor. It can be controlled remotely. The trojan can be used for sending spam.


When executed, the trojan copies itself in some of the the following locations:

  • %homepath%\­Application Data\­Microsoft\­Internet Explorer\­mssecure.exe
  • %windir%\­System\­mssecure.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]
    • ".mssecure" = "%windir%\­System\­mssecure.exe"
    • ".mssecure" = "%homepath%\­Application Data\­Microsoft\­Internet Explorer\­mssecure.exe"
  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows\­CurrentVersion\­Run]
    • ".mssecure" = "%windir%\­System\­mssecure.exe"
    • ".mssecure" = "%homepath%\­Application Data\­Microsoft\­Internet Explorer\­mssecure.exe"

The following Registry entries are set:

  • [HKEY_LOCAL_MACHINE\­SYSTEM\­CurrentControlSet\­Services\­SharedAccess\­Parameters\­FirewallPolicy\­StandardProfile\­AuthorizedApplications\­List]
    • "%windir%\­System\­mssecure.exe" = "%windir%\­System\­mssecure.exe:*:Enabled:Microsoft Update"
    • "%homepath%\­Application Data\­Microsoft\­Internet Explorer\­mssecure.exe" = "%homepath%\­Application Data\­Microsoft\­Internet Explorer\­mssecure.exe:*:Enabled:Microsoft Update"

The performed data entry creates an exception in the Windows Firewall program.

Other information

The trojan interferes with the operation of some security applications to avoid detection.

The following services are disabled:

  • wscsvc
  • SharedAccess
  • kavsvc
  • SAVScan
  • Symantec Core LC
  • navapsvc
  • wuauserv

The following Registry entry is deleted:

  • [HKEY_LOCAL_MACHINE\­Software\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "KAVPersonal50"

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

The trojan connects to the following addresses:


The IRC protocol is used.

The trojan can download and execute a file from the Internet.

The file is stored in the following location:

  • %system%\­application\­%variable%

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

The trojan can be used for sending spam.

Threat Variants with Description

Threat Variant Name Date Added Threat Type
Win32/Robobot 2005-03-23 trojan

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