TROJ_ADLOAD.JZ

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This Trojan deletes the following files:

• %User Profile%\Quick Launch\Internet Explorer.lnk
• %Start Menu%\Programs\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
• %Start Menu%\Programs\Internet Explorer.lnk
• %Start Menu%\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
• %Start Menu%\Internet Explorer.lnk
• %Desktop%\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\strLink

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\appTitle

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\proRunNum

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
open

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
open\Command

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup
proRunNum = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup
pageID = "0"

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
OpenHomePage\Command

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
OpenHomePage

Dropping Routine

This Trojan drops the following files:

• %User Temp%\ie.temp
• %Desktop%\Internet Explorer.lnk
• %User Profile%\Quick Launch\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
• %Start Menu%\Programs\Internet Explorer.lnk
• %Start Menu%\Internet Explorer.lnk

(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

This report is generated via an automated analysis system.