TROJ_INJECT.BUU

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.

It modifies files, disabling programs and applications from properly running.

It deletes itself after execution.

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 modifies the following files:

• %System%\browseui.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.)

Dropping Routine

This Trojan drops the following files:

• %Windows%\tasks\fxsst.dll
• %User Startup%\AcroRd32.exe

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

Other Details

This Trojan connects to the following possibly malicious URL:

• http://{BLOCKED}202.198/jp/0323/index.asp
• http://webmaff.{BLOCKED}5.com/a.asp?{random characters}
• http://{BLOCKED}8.249.35/a.asp?{random characters}

It deletes itself after execution.

This report is generated via an automated analysis system.