Threat Explorer

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Hacktool.SkSocket

Hacktool.SkSocket

Updated:
13 February 2007
Version:
v1.09
Publisher:
GNU China
Risk Impact:
High
File Names:
SkSockServer_enu.exe,WinTcpIp.exe
Systems Affected:
Windows

Behavior


Hacktool.SkSocket runs silently, installing itself as a service under Windows NT/2000/XP, and provides a socks proxy service on port 1813 (default).

Symptoms


  • The files on the system are detected as Hacktool.SkSocket.
  • Numerous connections to/from port 1813.


Behavior


May be distributed with Trojan packages, or may arrive disguised as an IRC script.

Antivirus Protection Dates

  • Initial Rapid Release version 02 October 2014 revision 022
  • Latest Rapid Release version 01 February 2015 revision 020
  • Initial Daily Certified version 25 September 2003
  • Latest Daily Certified version 17 January 2008 revision 033
  • Initial Weekly Certified release date 01 October 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Hackers commonly use Hacktool.SkSocket to hide their location.

It can operate in two modes:
  • As a stand-alone proxy
  • As a "middleman" proxy relaying encrypted socks data onto another computer running Hacktool.SkSocket. This would work as illustrated below:






The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
  1. Update the virus definitions.
  2. Run a full system scan. For any files detected as Hacktool.SkSocket, at a command prompt, run the file with the "-remove" flag. Then delete the detected file.

For specific details on each of these steps, read the following instructions.

1. Updating the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the Virus Definitions (LiveUpdate).
  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the Virus Definitions (Intelligent Updater).

    The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater" for detailed instructions.

2. Scanning for and deleting the infected files
  1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
  2. Run a full system scan.
  3. For any files detected as Hacktool.SkSocket, at a command prompt, run the file with the "-remove" flag.
  4. Delete the detected file.