TROJ_POPHOT.EB

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.

Installation

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

• %System%\zhqb080308.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\run

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\run
zhqb_df = "rundll32.exe %System%\zhqbdf080308.dll mymain"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Check_Associations = "no"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
EnableAutodial = "0"

Dropping Routine

This Trojan drops the following files:

• %System%\zhqbdf080308.dll
• %System Root%\zhqbdf.bat
• %System%\zhqb32.dll

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://www5.{BLOCKED}6.cn/mydown.asp?{random characters}
• http://www3.{BLOCKED}6.cn/mydown.asp?{random characters}
• http://www4.{BLOCKED}6.cn/mydown.asp?{random characters}
• http://www1.{BLOCKED}6.cn/mydown.asp?{random characters}
• http://www2.{BLOCKED}6.cn/mydown.asp?{random characters}

This report is generated via an automated analysis system.