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chkrootkit : ·çƮŶüŷ ÇÁ·Î±×·¥ ¼³Ä¡È°¿ë
±Û¾´ÀÌ : ÃÖ°í°ü¸®ÀÚ ³¯Â¥ : 2009-12-31 (¸ñ) 11:36 Á¶È¸ : 9905
±ÛÁÖ¼Ò :
                                
rootkitÀº ºñÁ¤»óÀûÀ¸·Î ¼­¹ö¸¦ °ø°ÝÇÏ¿© ÇØÅ·À» ÇÏ¿´À» ¶§ ÀÌÈÄ¿¡ º¸´Ù ½±°Ô Á¢¼ÓÀ» Çϱâ À§ÇØ ¹éµµ¾î³ª Æ®·ÎÀÌÀÜ ¸ñ¸¶ ÇÁ·Î±×·¥À» ¼³Ä¡ÇÏ¿© ½Ã½ºÅÛ¿¡ ¼û°Ü³õÀº ÇÁ·Î±×·¥À» ÀǹÌÇÑ´Ù.
´ëºÎºÐÀÇ ÇØÅ· »ç°í°¡ ¹ß»ýÇÏ¿´´Ù¸é ¹«Á¶°Ç À缳ġ°¡ ¿ì¼±µÇ¾î¾ß ÇÏÁö¸¸ ´Ù¾çÇÑ ÆÄÀÏ ¹«°á¼º °Ë»ç³ª ¶Ç´Â ·çƮŶ üŷ ÇÁ·Î±×·¥(chkrootkit)À» ÀÌ¿ëÇÏ¿© °Ë»çÇÒ ¼ö ÀÖ´Ù.

±×·¯³ª °¡Àå ¸¹ÀÌ »ç¿ëµÇ´Â ¸í·É¾î³ª ÇÙ½É ÇÁ·Î±×·¥ÀÇ ³»¿ëÀ» ÀϺθ¸ º¯°æÇÏ¿© Á¤»óÀûÀÎ ÆÄÀÏ·Î º¸ÀÌ°Ô ¸¸µé±â ¶§¹®¿¡ Àâ¾Æ³»±â ¸Å¿ì Èûµé¸ç ¶ÇÇÑ º¸¾ÈÀ» À§Çؼ­´Â À缳ġ¸¦ ÇØ¾ß ÇÑ´Ù.
±×·¯³ª ¹®Á¦´Â ÇØÅ· »ç°í°¡ ¹ß»ýÇÏ¿´´ÂÁö Á¶Â÷ ÆľÇÇÏÁö ¸øÇÏ´Â °æ¿ì°¡ Àִµ¥ À̶§´Â ÁÖ±âÀûÀ¸·Î ·çƮŶ ŽÁö ÇÁ·Î±×·¥À» »ç¿ëÇϰųª ÆÄÀÏ ¹«°á¼º °Ë»ç·Î ÆÄ¾Ç ÇÒ ¼ö ÀÖ´Ù.

chkrootkit ¼³Ä¡¸¦ ÅëÇؼ­ ÇöÀç ³»°¡ ¿î¿µÇÏ°í ÀÖ´Â ½Ã½ºÅÛ¿¡ ÆÄÀϹ«°á¼º¿¡ ¹®Á¦´Â ¾ø´ÂÁö È®ÀÎÇغ¸ÀÚ.



1.´Ù¿î·Îµå ¹× ¾ÐÃàÇØÁ¦
http://www.chkrootkit.org ·Î Á¢¼ÓÇÏ¿© ÇöÀç ¸±¸®ÁîµÈ ¼Ò½º¸¦ ´Ù¿î·ÎµåÇÏ°í md5sumÀ» ½ÇÇàÇÏ¿© ¼Ò½ºÀÇ º¯°æ À¯¹«¸¦ °Ë»çÇÏ°í ¾ÐÃàÀ» ÇØÁ¦ÇÑ´Ù.

2007. 05. 30.ÀÏ ÇöÀç ¾Æ·¡¹öÀüÀÌ ÃÖ±Ù¿¡ ³ª¿Â¼Ò½ºÀÌ´Ù.
 chkrootkit 0.47 is now available! (Release Date: Tue Oct 10 2006)

[root@mojjly]# wget ftp://ftp.pangeia.com.br/pub/seg/pac/chkrootkit.tar.gz

[root@mojily src]# md5sum chkrootkit.tar.gz
4c6455d202cef35395a673386e4bf01a  chkrootkit.tar.gz

[root@mojily src]# tar xvfz chkrootkit.tar.gz


2. ȯ°æ¼³Á¤ ¹× ¼³Ä¡
´Ù¿î¹ÞÀº ÆÄÀÏ ¾ÐÃàÀ» Ç®°í µé¾î°¡º¸¸é README ÆÄÀÏÀÌ º¸ÀδÙ.
´ëºÎºÐ¿¡ ¼Ò½ºÆÄÀÏ¿¡´Â Ä£ÀýÇÏ°Ôµµ README ÆÄÀϾȿ¡ ÇØ´ç ¼Ò½º°¡ ¹«¾ùÀÎÁö, ¾î¶»°Ô ¼³Ä¡ÇÏ´ÂÁö, »ç¿ëµÇ´Â ¿É¼Ç¹× ±âŸµîµî ÀÚ¼¼È÷ ³ª¿ÍÀÖ´Ù.
´Ù¸¸ ¿µ¾î¶ó´Â°Ô ¹®Á¦Áö¸¸;;;;;;;;
¾ÆÁÖ ¿µ¾î¿¡ XXX°¡ ¾Æ´Ï¶ó¸é ÀÌÁ¤µµ °£´ÜÇÑ ´Ü¾î ¿¬°áÀÌ¾ß ¹«½¼¸»ÀÎÁö ÀÌÇØ°¡ °¥°ÍÀÌ´Ù.


[root@mojily src]# cd chkrootkit-0.47

[root@mojily src]# ls
ACKNOWLEDGMENTS  README             check_wtmpx    chkdirs.c     chkproc     chkrootkit.lsm  chkwtmp    ifpromisc.c
COPYRIGHT        README.chklastlog  check_wtmpx.c  chklastlog    chkproc.c   chkutmp         chkwtmp.c  strings-static
Makefile         README.chkwtmp     chkdirs        chklastlog.c  chkrootkit  chkutmp.c       ifpromisc  strings.c

[root@mojily src]# cat README
.................................................
.................................................
.................................................

 5. Installation
 ---------------
 To compile the C programs type:
 # make sense
 After that it is ready to use and you can simply type:
 # ./chkrootkit



3.chkrootkit Å×½ºÆ®
¾Æ·¡¿Í °°ÀÌ ½ÇÇàÇÏ¸é ¸Ó°¡ ÈÄ´Ù´Ú Áö³ª°£´Ù.

[root@mojily chkrootkit-0.47]# pwd
/usr/local/src/chkrootkit-0.47
[root@smileserv chkrootkit-0.47]# ./chkrootkit
ROOTDIR is `/'
Checking `amd'... not found
Checking `basename'... not infected
Checking `biff'... not found
Checking `chfn'... not infected
Checking `chsh'... not infected
Checking `cron'... not infected
...........................................
...........................................



ÀÌÁ¦ ¸ÕÁö¸ð¸¦°ÍµéÀÌ Áö³ª°¬´Âµ¥ À̰͵éÀÌ ÀǹÌÇϴ°ÍÀÌ ¹«¾ùÀÎÁö ¾Ë¾Æº¸ÀÚ.
infected  :  rootkit¿¡ ÀÇÇØ º¯ÇüÀÌ µÊ
not infected  :  ¾î¶² ·çƮŶÀÇ ÁõÈĸ¦ ¹ß°ßÇÏÁö ¸øÇÔ / ÀÌ»ó¾øÀ½
not tested  :  Á¡°ËÀ» ½ÇÇàÇÏÁö ¸øÇÔ
not found  :  Á¡°ËÇÑ command°¡ ¾ø´Ù.
¡Ø °Ë»ç°á°ú¿¡¼­ infected°¡ Ãâ·ÂµÇ¾ú´Ù¸é rootkit¿¡ ÀÇÇØ º¯ÇüµÈ ÆÄÀÏÀÌ Á¸ÀçÇÑ´Ù´Â ÀǹÌÀ̹ǷΠ¹Ýµå½Ã ¼¼ºÎÀûÀÎ °Ë»ç°¡ ÇÊ¿äÇÏ¸ç ¶§¿¡ µû¶ó¼­´Â OS¸¦ À缳ġÇØ¾ß ÇÑ´Ù.


4. chkrootkit ¿É¼Ç
´ÙÀ½Àº "chkrootkit" ¸í·É¾î¿¡¼­ Á¦°øÇÏ´Â ¿É¼ÇÀÌ´Ù.
Çϳª¾¿ ½ÇÇàÇؼ­ Â÷ÀÌÁ¡ÀÌ ¹«¾ùÀÎÁö ºñ±³ÇØ º¸¸é ¾î¶»°Ô ´Ù¸¥Áö ±Ý¹æ ´«¿¡ º¸ÀÏ°ÍÀÌ´Ù.
-d  :  debug °Ë»ç Á¤º¸¸¦ Ãâ·Â
-n  :  ¿É¼ÇÀ» Ãâ·Â
-l   :  °Ë»çÇÒ¶§ »ç¿ëÇÒ ¸®½ºÆ®¸¦ Ãâ·Â
-q  :  ÀϹÝÀûÀÎ °Ë»ç³»¿ëÀº »ý·«ÇÏ¸ç °Ë»ç Á¤º¸¸¸ Ãâ·Â
-r,p  :  ÁöÁ¤ÇÑ µð·ºÅ丮¸¦ ÃÖ»óÀ§ µð·ºÅ丮·Î ¼³Á¤ÇÏ¿© °Ë»çÇÏ¸ç ¿©·¯°³¸¦ ÁöÁ¤ÇÏ°íÀÚ ÇÒ¶§´Â -p ¿É¼ÇÀ» »ç¿ëÇÒ¼ö ÀÖÀ¸³ª ÀϹÝÀûÀΠȯ°æ¿¡¼­´Â »ç¿ëµÇÁö ¾ÊÀ½
-x  :  Àü¹®°¡ ¸ðµå·Î Ãâ·Â
-V  :  ¹öÀü Á¤º¸¸¦ Ãâ·Â


5. ½ºÅ©¸³Æ®¸¦ ÅëÇÑ ¸ÞÀÏÀü¼Û
´ëÃæ chkrootkitÀÌ ¹«¾ùÀÎÁö ¾Ë¾ÒÀ»°ÍÀÌ´Ù.
ÀÌÁ¦´Â ¸ÅÀϸ¶´Ù µé¾î°¡¼­ üũÇϱⰡ ±ÍÂúÀ»°ÍÀÌ´Ù...
¸®´ª½º¿¡´Â cron µ¥¸óÀ̶ó´Â ¾ÆÁÖ À¯¿ëÇÑ ³à¼®ÀÌ ½Ã°£¿¡ ¸¶Ãç¼­ ¸í·É¾î¸¦ ½ÇÇàÇØÁØ´Ù.
°£´ÜÇÏ°Ô ½ºÅ©¸³Æ®¸¦ ÀÌ¿ëÇؼ­ ÇÏ·ç¿¡ Çѹø ¸ÞÀÏÀ» ÅëÇؼ­ Á¡°Ë°á°ú¸¦ ÀÚµ¿Àü¼ÛÇÒ¼ö ÀÖ°Ô±Ý ¼³Á¤Çغ¸ÀÚ.

[root@mojily chkrootkit-0.47]# cd /etc/cron.daily

[root@mojily chkrootkit-0.47]# cat smileserv.chkrootkit_ckeck
#!/bin/bash
BASE=/usr/local/src/chkrootkit-0.47
cd $BASE
chk=`./chkrootkit`
if [ -n "$chk" ] ;then
       echo $chk | mail -s "My SYSTEM Chkrootkit Result " »ç¿ëID@»ç¿ëµµ¸ÞÀÎ
       echo Finished
fi


À§¿Í °°ÀÌ ½ºÅ©¸³Æ® ÆÄÀÏÀ» ¸¸µé°í Å×½ºÆ®»ï¾Æ µ¹·ÁÁÖ¸é Àڽſ¡ MAIL·Î 1Åë¿¡ ¹Ý°¡¿î¸ÞÀÏÀÌ ¼ö½ÅµÈ°É È®ÀÎÇÏ¸é ³¡...........

À̸§ Æнº¿öµå
ºñ¹Ð±Û (üũÇÏ¸é ±Û¾´À̸¸ ³»¿ëÀ» È®ÀÎÇÒ ¼ö ÀÖ½À´Ï´Ù.)
¿ÞÂÊÀÇ ±ÛÀÚ¸¦ ÀÔ·ÂÇϼ¼¿ä.
   

 



 
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