Hacktool.IPStealer

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Discovered: January 10, 2002
Updated: February 13, 2007 11:38:01 AM
Type: Trojan Horse, Worm


Hacktool.IPStealer is the detection for a collection of programs that a hacker can use to conceal intrusion and to obtain administrator-level access to Microsoft SQL Servers that have the default installation, in which the Administrator account has no password.

Antivirus Protection Dates

  • Initial Rapid Release version January 17, 2002
  • Latest Rapid Release version March 23, 2017 revision 037
  • Initial Daily Certified version January 17, 2002
  • Latest Daily Certified version March 23, 2017 revision 041

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Yana Liu

Discovered: January 10, 2002
Updated: February 13, 2007 11:38:01 AM
Type: Trojan Horse, Worm


This Trojan consists of the following seven programs:

  • Sqlprocess.js
  • Sqldir.js
  • Run.js
  • Sqlinstall.bat
  • Clemail.exe
  • Sqlscan.exe
  • Sqlexec.exe

NOTE: Clemail.exe is a shareware program and is not a Trojan.

Microsoft SQL Server is vulnerable if it has the default installation where the administrator account has no password. Hacktool.IPStealer uses this vulnerability to send itself to other vulnerable Microsoft SQL Servers.

When it is executed, Hacktool.IPStealer does the following:

It scans randomly generated IP addresses on port 1433 in an attempt to find active Microsoft SQL Servers.

Next it tries to add a user to the server and copy itself to the server using the default system administrator account. It also sends the server's IP address and some database information to the hacker's email account.

The Trojan also adds the registry key

HKEY_LOCAL_MACHINE\Software\Microsoft\Mssqlserver\Client\Connectto\Dsquery

with the value

dbmssocn

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.

Writeup By: Yana Liu

Discovered: January 10, 2002
Updated: February 13, 2007 11:38:01 AM
Type: Trojan Horse, Worm


To remove this Trojan, delete files that are detected as Hacktool.IPStealer and remove the value that it added to the registry.

Writeup By: Yana Liu