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Trojan:WinNT/Sality


Trojan:WinNT/Sality is a driver used by the Win32/Sality family to disable any hooks into the system service descriptor table (SSDT).


What to do now

To detect and remove this threat and other malicious software that may be installed in your computer, run a full-system scan with an up-to-date antivirus product such as the following:
 
 
For more information on antivirus software, see http://www.microsoft.com/windows/antivirus-partners/.

Threat behavior

Trojan:WinNT/Sality is a driver used by the Win32/Sality family, Virus:Win32/Sality, Virus:Win32/Sality.AT and Virus:Win32/Sality.AU to disable any hooks into the system service descriptor table (SSDT).
 
It does this by copying the SSDT directly from ntoskrnl.exe and redirecting system calls to that copy rather than the active SSDT. This can effectively disable security software that relies on SSDT hooks, such as some HIPS and anti-virus software.
 
Analysis by Hamish O'Dea

Symptoms

There are no common symptoms associated with this threat. Alert notifications from installed antivirus software may be the only symptoms.

Prevention


Alert level: Severe
First detected by definition: 1.61.389.0
Latest detected by definition: 1.187.58.0 and higher
First detected on: Jun 25, 2009
This entry was first published on: Aug 10, 2010
This entry was updated on: Apr 17, 2011

This threat is also detected as:
No known aliases