TROJ_AGENT_043703.TOMB

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%\drivers\etc\hosts

(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.)

It deletes the following files:

• %System%\drivers\etc\hosts
• %User Temp%\1.tmp
• %User Temp%\DD_VCR~2.TXT
• %User Temp%\DD_VCR~4.TXT
• %User Temp%\DD_VCR~1.TXT
• %User Temp%\DD_VCR~3.TXT
• %User Temp%\PERFLI~1.DAT
• %User Temp%\PERFLI~2.DAT
• %User Temp%\_$Df\DF6Wks.sib

(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.. %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.)

It deletes the following folders:

• %User Temp%\_$Df

(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.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\VCP

It adds the following registry entries:

HKEY_CURRENT_USER\Software\VCP
LS = "1"

Dropping Routine

This Trojan drops the following files:

• %User Temp%\5709.sys
• %User Temp%\7iQG7.exe
• %User Profile%\Application Data\dbcfg.cmd

(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.. %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.)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://{BLOCKED}83.115?{random characters}
• http://update1.{BLOCKED}ecleaner.in/?{random characters}

It deletes itself after execution.

This report is generated via an automated analysis system.