TSPY_QQPASS.ARH

This Trojan may be downloaded by other malware/grayware/spyware from remote sites. It may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

It may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CLASSES_ROOT\CLSID\{8D79D9C6-D210-476A-82B7-5D9113A40CE3}
(default) = %Application Data%\Dna.sys

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CLASSES_ROOT\CLSID\{8D79D9C6-D210-476A-82B7-5D9113A40CE3}
=

HKEY_CURRENT_USER\Software\Tencent
=

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
ShellExecuteHooks
{8D79D9C6-D210-476A-82B7-5D9113A40CE3} =

Dropping Routine

This Trojan drops the following files:

• %Application Data%\Dna.sys - also detected as TSPY_QQPASS.ARH
• %Application Data%\Dns.New - also detected as TSPY_QQPASS.ARH

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

Other Details

Based on analysis of the codes, it has the following capabilities:

• Checks if it is loaded by any of the following files: Qq.exe, Explorer.exe, VerclsId.exe, or iexplore.exe.
• Attempts to steal sensitive user information such as user names and passwords related to QQ, a popular Instant Messaging application in China.