TROJ_AGENT.TNWW

Installation

This Trojan adds the following possibly malicious files or file components:

• %Application Data%\zunktir.dll

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Autostart Technique

This Trojan creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
zunktir = "rundll32 "%Application Data%\zunktir.dll",zunktir"

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\Current Version\Winlogon\
Notify\zunktir

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\Current Version\Winlogon\
Notify\zunktir
Impersonate = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\Current Version\Winlogon\
Notify\zunktir
Asynchoronous = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\Current Version\Winlogon\
Notify\zunktir
MaxWait = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\Current Version\Winlogon\
Notify\zunktir
nilupsit = "{Hex Values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\Current Version\Winlogon\
Notify\zunktir
Startup = "zunktir"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\Current Version\Winlogon\
Notify\zunktir
DllName = "%Application Data%\zunktir"

It creates the following registry entry(ies) to bypass Windows Firewall:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{Malware Path}\{Malware Filename}.exe = "{Malware Path}\{Malware Filename}.exe:*:Enabled:{Malware Filename}"

Other Details

This Trojan connects to the following possibly malicious URL:

• ns1.{BLOCKED}tme.me.uk