Difference between revisions of "Chkrootkit"

Revision as of 08:06, 14 June 2017

What's chkrootkit?

Chkrootkit adalah tool untuk memeriksa tanda-tanda rootkit secara lokal.

Instalasi

Siapkan compiler

sudo su
apt install make gcc

Download source code

cd /usr/local/src
wget ftp://ftp.pangeia.com.br/pub/seg/pac/chkrootkit.tar.gz
tar zxvf chkrootkit.tar.gz
cd /usr/local/src/chkrootkit-0.52/
make sense

Menjalankan

cd /usr/local/src/chkrootkit-0.52
./chkrootkit

atau

cd /usr/local/src/chkrootkit-0.52
./chkrootkit -q

Penggunaan

# ./chkrootkit

Usage: ./chkrootkit [options] [test ...]
Options:
        -h                show this help and exit
        -V                show version information and exit
        -l                show available tests and exit
        -d                debug
        -q                quiet mode
        -x                expert mode
        -r dir            use dir as the root directory
        -p dir1:dir2:dirN path for the external commands used by chkrootkit
        -n                skip NFS mounted dirs

testname salah satu atau lebih dari daftar berikut,

aliens asp bindshell lkm rexedcs sniffer w55808 wted scalper slapper
z2 chkutmp amd basename biff chfn chsh cron crontab date du dirname
echo egrep env find fingerd gpm grep hdparm su ifconfig inetd
inetdconf identd init killall ldsopreload login ls lsof mail mingetty
netstat named passwd pidof pop2 pop3 ps pstree rpcinfo rlogind rshd
slogin sendmail sshd syslogd tar tcpd tcpdump top telnetd timed
traceroute vdir w write

Contoh

./chkrootkit ps ls sniffer

untuk melihat data lebih banyak

./chkrootkit -x | more

Melihat pathname dalam sistem command

./chkrootkit -x | egrep '^/'

chkrootkit menggunakan command berikut untukl melakukan test: awk, cut, egrep, find, head, id, ls, netstat, ps, strings, sed, uname. Pakai option -p untuk memberikan alternate path untuk chkrootkit agar tidak menggunakan system command yang mungkin sudah terinfeksi. Contoh,

./chkrootkit -p /cdrom/bin

Untuk beberapa path.

./chkrootkit -p /cdrom/bin:/floppy/mybin

Ada baiknya mount disk mesin yang ter-compromise ke mesin yang bisa di percaya, misalnya disk ada di /mnt, gunakan.

./chkrootkit -r /mnt

Output Messages

Keluaran

"INFECTED": the test has identified a command probably modified by a known rootkit;
"not infected": the test didn't find any known rootkit signature.
"not tested": the test was not performed -- this could happen in

  the following situations:
    a) the test is OS specific;
    b) the test depends on an external program that is not available;
    c) some specific command line options are given. (e.g. -r ).

not found": the command to be tested is not available;
"Vulnerable but disabled": the command is infected but not in use. not running or commented in inetd.conf)

A trojaned command has been found. What should I do now?

Your biggest problem is that your machine has been compromised and this bad guy has root privileges.

Maybe you can solve the problem by just replacing the trojaned command -- the best way is to reinstall the machine from a safe media and to follow your vendor's security recommendations.

Referensi

Pranala Menarik

@@ Line 33: / Line 33: @@
   # ./chkrootkit
-  Usage: ./chkrootkit [options] [testname ...]
+  Usage: ./chkrootkit [options] [test ...]
   Options:
           -h                show this help and exit
           -V                show version information and exit
-          -l                show available tests
+          -l                show available tests and exit
           -d                debug
           -q                quiet mode
@@ Line 57: / Line 57: @@
 Contoh
-  # ./chkrootkit ps ls sniffer
+  ./chkrootkit ps ls sniffer
- The `-q' option can be used to put chkrootkit in quiet mode -- in
+untuk melihat data lebih banyak
- this mode only output messages with `infected' status are shown.
-  With the `-x' option the user can examine suspicious strings in the
+  ./chkrootkit -x | more
- binary programs that may indicate a trojan -- all the analysis is
- left to the user.
- Lots of data can be seen with:
+Melihat pathname dalam sistem command
-   # ./chkrootkit -x | more
+ ./chkrootkit -x | egrep '^/'
-  Pathnames inside system commands:
+chkrootkit menggunakan command berikut untukl melakukan test: awk, cut, egrep, find, head, id, ls, netstat, ps, strings, sed, uname.  Pakai option -p untuk memberikan alternate path untuk chkrootkit agar tidak menggunakan system command yang mungkin sudah terinfeksi. Contoh,
-   # ./chkrootkit -x | egrep '^/'
+ ./chkrootkit -p /cdrom/bin
- chkrootkit uses the following commands to make its tests: awk, cut,
+Untuk beberapa path.
- egrep, find, head, id, ls, netstat, ps, strings, sed, uname.  It is
- possible, with the `-p' option, to supply an alternate path to
- chkrootkit so it won't use the system's (possibly) compromised
- binaries to make its tests.
-  To use, for example, binaries in /cdrom/bin:
+  ./chkrootkit -p /cdrom/bin:/floppy/mybin
-   # ./chkrootkit -p /cdrom/bin
+Ada baiknya mount disk mesin yang ter-compromise ke mesin yang bisa di percaya, misalnya disk ada di /mnt, gunakan.
- It is possible to add more paths with a `:'
-   # ./chkrootkit -p /cdrom/bin:/floppy/mybin
- Sometimes is a good idea to mount the disk from a compromised machine
- on a machine you trust.  Just mount the disk and specify a new
- rootdir with the `-r' option.
- For example, suppose the disk you want to check is mounted under
- /mnt, then:
-   # ./chkrootkit -r /mnt
+ ./chkrootkit -r /mnt
 ==Output Messages==