TROJ_FAKESYSD

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.

It modifies the Internet Explorer Zone Settings.

It displays fake alerts.

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.

It may be downloaded from the following remote sites:

• http://{BLOCKED}munity.ru/load.php?file={parameter}

Installation

This Trojan drops the following copies of itself into the affected system:

• %System Root%\Documents and Settings\All Users\Application Data\{random file name}.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

It drops the following files:

• %Desktop%\System Check.lnk
• %Desktop%\System Fix.lnk
• %Desktop%\System Restore.lnk
• %Start Menu%\Programs\System Check\System Check.lnk
• %Start Menu%\Programs\System Check\Uninstall System Check.lnk
• %Start Menu%\Programs\System Fix\System Fix.lnk
• %Start Menu%\Programs\System Fix\Uninstall System Fix.lnk
• %Start Menu%\Programs\System Restore\System Restore.lnk
• %Start Menu%\Programs\System Restore\Uninstall System Restore.lnk
• %System Root%\Documents and Settings\All Users\Application Data\{random filename}
• %User Profile%\Application Data\Microsoft\Internet Explorer\Quick Launch\System Fix.lnk

(Note: %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It creates the following folders:

• %User Temp%\smtmp
• %User Temp%\smtmp\1
• %User Temp%\smtmp\2
• %User Temp%\smtmp\3
• %User Temp%\smtmp\4
• %Start Menu%\Programs\System Fix
• %Start Menu%\Programs\System Check
• %Start Menu%\Programs\System Restore

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

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random file name} = "%System Root%\Documents and Settings\All Users\Application Data\(random file name}.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
{random file name}.exe = "%System Root%\Documents and Settings\All Users\Application Data\{random file name}.exe

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
DisableTaskMgr = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
NoDesktop = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableTaskMgr = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Attachments
SaveZoneInformation = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
ActiveDesktop
NoChangingWallpaper = "1"

HKEY_CURRENT_USER\Control Panel
{random CLSID} = ""

HKEY_CURRENT_USER\Control Panel
nsreg = "{hex value}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Associations
LowRiskFileTypes = ".zip;.rar;.nfo;.txt;.exe;.bat;.com;.cmd;.reg;.msi;.htm;.html;.gif;.bmp;.jpg;.avi;.mpg;.mpeg;.mov;.mp3;.m3u;.wav;.scr;"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Use FormSuggest = "Yes"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer
EnableAutoTray = "0"

HKEY_CURRENT_USER\Control Panel
bin = "{hex value}"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Download
CheckExeSIgnatures = "no"

(Note: The default value data of the said registry entry is yes.)

Web Browser Home Page and Search Page Modification

This Trojan modifies the Internet Explorer Zone Settings.

Other Details

This Trojan connects to the following possibly malicious URL:

• http://{BLOCKED}al.com/up.php?{random characters}
• http://{BLOCKED}ave.com/up.php?{random characters}
• http://{BLOCKED}ary.com/up.php?{random characters}
• http://{BLOCKED}m.com/up.php?{random characters}
• http://{BLOCKED}afano.com/up.php?{random characters}
• http://{BLOCKED}tybask.com/up.php
• http://{BLOCKED}idetor.com/up.php
• http://{BLOCKED}ametenub.com
• http://{BLOCKED}ormigoat.com
• http://{BLOCKED}bsawe.com
• http://{BLOCKED}ranap.com
• http://{BLOCKED}dubs.com
• http://{BLOCKED}ghtuc.com

Rogue Antivirus Routine

This Trojan displays fake alerts.