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トップ «前の日記(2008-07-11(金)) 最新 次の日記(2008-07-13(日))» 編集

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巻き戻し中。
前 2008年
7月		 次
日 月 火 水 木 金 土
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31

2008-07-12(土) ふぅ・・・ [長年日記]

_ 結局

帰り道秋葉原で仕事に使うDVDドライブを購入。

夕方から泥のように睡眠。

_ PC ssh攻撃

ツール改良が一応まとまった。

grep -F/fgrepは、単純に使うとちょっと困る。

一行で1分間／1時間のカウントの数字も入っているので、行単位の比較だと含まれちゃう。

ちょっと無駄だが2段階で比較。

反転の-vはfgrep、ファイル同士だが普通の比較はgrepでどうだろうか。。。

いやいや、それにしても1行が長すぎだな。

「\」で折り返すこと多数。。。

これだけコメント書いて、ファイル吐き出ししてれば動作は分かりやすいと思う。

誰かperl辺りに移植してサクッと動くようにしてけれ。

以下source

【相変わらず/bin/shです(^^ゞ】

#!/bin/sh
#
# ssh_chk.sh By H.Uekusa 2007
# Ver 2.01 2008.7.13
# Automated defending tool for ssh attack.
# This command must be set on the cron with every minutes
###############################################################################
#
# You should set 
# $SHPATH [$TMP]/total_min_ipfw_add_cmd.txt
# $SHPATH [$TMP]/total_hour_ipfw_add_cmd.txt
# in /etc/rc.local
#
###############################################################################
　
###############################################################################
# Set variable for location of commands, Path of files...
###############################################################################
CATPATH="/bin/cat"
AWKPATH="/usr/bin/awk"
GREPPATH="nice -n 10 /usr/bin/grep --mmap "
DIFFPATH="/usr/bin/diff"
SORTPATH="/usr/bin/sort"
MAILPATH="/usr/bin/mail"
DATEPATH="/bin/date"
SHPATH="/bin/sh"
LOOKUP="/usr/sbin/nslookup"
AUTHLOG="/var/log/auth.log"
TMP="/var/tmp"
LOCKFILE="ssh_chk.lock"
PREV_MIN_RECORD="prev_min"
　
# Should be BSD-Firewall
IPFWPATH="/sbin/ipfw"
　
# Select to check "attempt"
CHK_IP_RESOLV="yes"
CHK_IP_MAP="yes"
　
# Set threshold
OK_PER_MIN="4"
OK_PER_HOUR="10"
　
# Set IPFW parameters
IPFW_NUM="999"
PORT="22"
IF_NAME="fxp0"
　
# Set valid e-mail!
MAILTO="hoge@hoge"
　
###############################################################################
　
#
#check lock file
#
if [ -f "$TMP/$LOCKFILE" ];then
	echo "$0 is executing already"
	echo "Please wait for a while or remove lock file $LOCKFILE!"
	exit
fi
　
#
#put a lock file
#
touch $TMP/$LOCKFILE
　
###############################################################################
#
#Get date values
#
###############################################################################
NOW=`$DATEPATH +%Y%m%d%H%M`
PREV=`cat $TMP/$PREV_MIN_RECORD`
# PREV=`$DATEPATH -v -1M +%Y%m%d%H%M`
NOW_HOUR=`$DATEPATH +%Y%m%d%H`
PREV_HOUR=`$DATEPATH -v -1H +%Y%m%d%H`
　
touch $TMP/ipfw_added.txt
$SORTPATH -u $TMP/ipfw_added.txt >$TMP/ipfw_added.txt.sort
cp -p $TMP/ipfw_added.txt.sort $TMP/ipfw_added.txt
rm -f $TMP/ipfw_added.txt.sort
　
###############################################################################
#
#Get failed lines from auth log
#
###############################################################################
　
# Find a tring for invalid user for FreeBSD 6.x and later
$GREPPATH Invalid $AUTHLOG > $TMP/"$NOW"_fail.txt
　
# It's old version of above for FreeBSD 4.x/5.x
# $GREPPATH Illegal $AUTHLOG > $TMP/"$NOW"_fail.txt
　
#
#Touch the previous file for safe
#
touch $TMP/"$PREV"_fail.txt
echo "$NOW" > $TMP/$PREV_MIN_RECORD
　
###############################################################################
#
#Compare with before one minutes
#
###############################################################################
　
$DIFFPATH $TMP/"$NOW"_fail.txt $TMP/"$PREV"_fail.txt |$GREPPATH '^<' > $TMP/diff_raw.txt
NONE_STATUS=`$GREPPATH -c ssh $TMP/diff_raw.txt`
　
###############################################################################
#
#Detect a probing of ssh from attacker (Selective)
#As same as above procedure for normal check
#
###############################################################################
　
if [ "$CHK_IP_RESOLV" = "yes" ];then
	$GREPPATH "POSSIBLE BREAK-IN ATTEMPT" $AUTHLOG |$GREPPATH "getaddrinfo"\
	 > $TMP/"$NOW"_fail-attack.txt
	touch $TMP/"$PREV"_fail-attack.txt
	$DIFFPATH $TMP/"$NOW"_fail-attack.txt $TMP/"$PREV"_fail-attack.txt \
	|$GREPPATH '^<' > $TMP/diff_raw-attack.txt
	NONE_STATUS_ATTACK=`$GREPPATH -c ssh $TMP/diff_raw-attack.txt`
else
	NONE_STATUS_ATTACK="0"
fi
　
if [ "$CHK_IP_MAP" = "yes" ];then
	$GREPPATH "POSSIBLE BREAK-IN ATTEMPT" $AUTHLOG |$GREPPATH "not map back to the address"\
	 > $TMP/"$NOW"_fail-attack2.txt
	touch $TMP/"$PREV"_fail-attack2.txt
	$DIFFPATH $TMP/"$NOW"_fail-attack2.txt $TMP/"$PREV"_fail-attack2.txt\
	 |$GREPPATH '^<' > $TMP/diff_raw-attack2.txt
	NONE_STATUS_ATTACK2=`$GREPPATH -c ssh $TMP/diff_raw-attack2.txt`
else
	NONE_STATUS_ATTACK2="0"
fi
　
###############################################################################
#
# if diff is null, skip all process and exit
#
###############################################################################
　
if [ "$NONE_STATUS" = "0" ];then
	if [ "$NONE_STATUS_ATTACK" = "0" ];then
		if [ "$NONE_STATUS_ATTACK2" = "0" ];then
			touch $TMP/"$NOW_HOUR"-summary-hour_count_list.txt
			touch $TMP/count_list.txt
			touch $TMP/count_cmd.sh
			touch $TMP/min_ipfw_add_cmd.txt
			touch $TMP/min_ipfw_add_cmd_prev.txt
			touch $TMP/ipfw_added.txt
			touch $TMP/hour_ipfw_add_cmd.txt
			touch $TMP/hour_ipfw_add_cmd_prev.txt
			touch $TMP/"$NOW_HOUR"-hour_count_list.txt
			rm -f $TMP/"$PREV_HOUR"*
			rm -f $TMP/$LOCKFILE
			exit
		fi
	fi
fi
　
###############################################################################
#
#Exec for attack suddenly
#
###############################################################################
　
###############################################################################
# For IP resolv
###############################################################################
　
if [ "$NONE_STATUS_ATTACK" != "0" ];then
	touch $TMP/min_ipfw_add_cmd-attack.txt
	cp -p $TMP/min_ipfw_add_cmd-attack.txt $TMP/min_ipfw_add_cmd_prev-attack.txt
	$CATPATH $TMP/"$NOW"_fail-attack.txt|$AWKPATH '{print $12}' | $AWKPATH -F"\]" '{print $1}' \
	| $AWKPATH -F'\[' '{print $2}' > $TMP/count_list-attack.txt
	$SORTPATH -u $TMP/count_list-attack.txt >$TMP/count_list-attack.sort.txt
        cp -p $TMP/count_list-attack.sort.txt $TMP/count_list-attack.txt
        rm -f $TMP/count_list-attack.sort.txt
	$GREPPATH -F -v -f $TMP/ipfw_added.txt $TMP/count_list-attack.txt\
	| $AWKPATH -v IPFW_NUM=`echo $IPFW_NUM` -v IF_NAME=`echo $IF_NAME` \
	-v PORT=`echo $PORT` -v IPFWPATH=`echo $IPFWPATH` \
	'{ print IPFWPATH" add "IPFW_NUM" deny tcp from "$1"/24 to any "PORT" via "IF_NAME}' \
	> $TMP/min_ipfw_add_cmd-attack.txt
	$DIFFPATH $TMP/min_ipfw_add_cmd_prev-attack.txt $TMP/min_ipfw_add_cmd-attack.txt|$GREPPATH '^>'
	if [ "$?" = "0" ]; then
        	$DATEPATH >> $TMP/defend-log
      		$DATEPATH >> $TMP/defend-log.time
       		$SHPATH $TMP/min_ipfw_add_cmd-attack.txt >> $TMP/defend-log
		$AWKPATH '{print $7}' $TMP/min_ipfw_add_cmd-attack.txt | $AWKPATH -v LOOKUP=`echo $LOOKUP` -F/ \
		'{print LOOKUP" "$1}' > $TMP/defend-name-log-attack.cmd
	 	$CATPATH $TMP/min_ipfw_add_cmd-attack.txt > $TMP/min_mailbody-attack.txt
		$SHPATH $TMP/defend-name-log-attack.cmd >> $TMP/min_mailbody-attack.txt
		echo "by POSSIBLE BREAK-IN ATTEMPT ip-resolv" >> $TMP/min_mailbody-attack.txt
		$MAILPATH -s "SSH attack detected by minutes" $MAILTO < $TMP/min_mailbody-attack.txt
### to keep when reboot ###
		$CATPATH $TMP/min_ipfw_add_cmd-attack.txt >> $TMP/total_min_ipfw_add_cmd.txt
### check for double ###
		$GREPPATH -F -v -f $TMP/ipfw_added.txt $TMP/count_list-attack.txt >> $TMP/ipfw_added.txt
	fi
fi
　
###############################################################################
# For IP reverse map
###############################################################################
　
if [ "$NONE_STATUS_ATTACK2" != "0" ];then
	touch $TMP/min_ipfw_add_cmd-attack2.txt
	cp -p $TMP/min_ipfw_add_cmd-attack2.txt $TMP/min_ipfw_add_cmd_prev-attack2.txt
	$CATPATH $TMP/"$NOW"_fail-attack2.txt|$AWKPATH '{print $7}' > $TMP/count_list-attack2.txt
	$SORTPATH -u $TMP/count_list-attack2.txt >$TMP/count_list-attack.sort2.txt
        cp -p $TMP/count_list-attack.sort2.txt $TMP/count_list-attack2.txt
        rm -f $TMP/count_list-attack.sort2.txt
	$GREPPATH -F -v -f $TMP/ipfw_added.txt $TMP/count_list-attack2.txt\
	| $AWKPATH -v IPFW_NUM=`echo $IPFW_NUM` -v IF_NAME=`echo $IF_NAME` \
	-v PORT=`echo $PORT` -v IPFWPATH=`echo $IPFWPATH` \
	'{ print IPFWPATH" add "IPFW_NUM" deny tcp from "$1"/24 to any "PORT" via "IF_NAME}' \
	> $TMP/min_ipfw_add_cmd-attack2.txt
	$DIFFPATH $TMP/min_ipfw_add_cmd_prev-attack2.txt $TMP/min_ipfw_add_cmd-attack2.txt|$GREPPATH '^>'
	if [ "$?" = "0" ]; then
        	$DATEPATH >> $TMP/defend-log
      		$DATEPATH >> $TMP/defend-log.time
       		$SHPATH $TMP/min_ipfw_add_cmd-attack2.txt >> $TMP/defend-log
		$AWKPATH '{print $7}' $TMP/min_ipfw_add_cmd-attack2.txt \
		| $AWKPATH -v LOOKUP=`echo $LOOKUP` -F/ '{print LOOKUP" "$1}' \
		> $TMP/defend-name-log-attack2.cmd
	 	$CATPATH $TMP/min_ipfw_add_cmd-attack2.txt > $TMP/min_mailbody-attack2.txt
		$SHPATH $TMP/defend-name-log-attack2.cmd >> $TMP/min_mailbody-attack2.txt
		echo "by POSSIBLE BREAK-IN ATTEMPT ip-reverse-map" >> $TMP/min_mailbody-attack2.txt
		$MAILPATH -s "SSH attack detected by minutes" $MAILTO < $TMP/min_mailbody-attack2.txt
### to keep when reboot ###
		$CATPATH $TMP/min_ipfw_add_cmd-attack2.txt >> $TMP/total_min_ipfw_add_cmd.txt
### check for double ###
		$GREPPATH -F -v -f $TMP/ipfw_added.txt $TMP/count_list-attack2.txt >> $TMP/ipfw_added.txt
	fi
fi
　
###############################################################################
#
#Count per min
#
###############################################################################
　
$SORTPATH -u +10 $TMP/diff_raw.txt \
|$AWKPATH -v TMP=`echo $TMP` '{print "echo -n \""$11" \"; grep -c "$11" "TMP"/diff_raw.txt"}' \
> $TMP/count_cmd.sh
$SHPATH $TMP/count_cmd.sh > $TMP/count_list.txt
　
###############################################################################
#
#Count per hour
#
###############################################################################
　
$CATPATH $TMP/count_list.txt >>$TMP/"$NOW_HOUR"-hour_count_list.txt
$SORTPATH +1 $TMP/"$NOW_HOUR"-hour_count_list.txt \
|$AWKPATH '{if ( $1 == PREV ) { ADDR = $1; COUNT = COUNT + $2; PREV = ADDR;}\
 else { ADDR = $1; print PREV" "COUNT; COUNT = $2 ; PREV = ADDR;} next} END {print $1" "COUNT}'\
 >$TMP/"$NOW_HOUR"-summary-hour_count_list.txt
　
###############################################################################
#
#Process with threthold
#
###############################################################################
　
touch $TMP/ipfw_added.txt
　
### minutes ###
touch $TMP/min_ipfw_add_cmd.txt
cp -p $TMP/min_ipfw_add_cmd.txt $TMP/min_ipfw_add_cmd_prev.txt
$CATPATH $TMP/count_list.txt | $AWKPATH '{print $1}' > $TMP/count_list-addr.txt
$GREPPATH -F -v -f $TMP/ipfw_added.txt $TMP/count_list-addr.txt > $TMP/count_list-new.txt
$GREPPATH -f $TMP/count_list-new.txt $TMP/count_list.txt \
| $AWKPATH -v OK_PER_MIN=`echo $OK_PER_MIN` -v IPFW_NUM=`echo $IPFW_NUM` -v IF_NAME=`echo $IF_NAME`\
 -v PORT=`echo $PORT` -v IPFWPATH=`echo $IPFWPATH` \
'{ if ( $2 > OK_PER_MIN ) {print IPFWPATH" add "IPFW_NUM" deny tcp from "$1"/24 to any "PORT" via "IF_NAME}}' \
> $TMP/min_ipfw_add_cmd.txt
　
### to keep when reboot ###
$CATPATH $TMP/min_ipfw_add_cmd.txt >> $TMP/total_min_ipfw_add_cmd.txt
　
### check for double ###
$GREPPATH -F -v -f $TMP/ipfw_added.txt $TMP/count_list.txt \
| $AWKPATH -v OK_PER_MIN=`echo $OK_PER_MIN` '{ if ( $2 > OK_PER_MIN ) {print $1}}'\
 >> $TMP/ipfw_added.txt
　
### hour ###
touch $TMP/hour_ipfw_add_cmd.txt
cp -p $TMP/hour_ipfw_add_cmd.txt $TMP/hour_ipfw_add_cmd_prev.txt
$CATPATH $TMP/"$NOW_HOUR"-summary-hour_count_list.txt \
| $AWKPATH '{print $1}' > $TMP/"$NOW_HOUR"-summary-hour_count_list-addr.txt
$GREPPATH -F -v -f $TMP/ipfw_added.txt $TMP/"$NOW_HOUR"-summary-hour_count_list-addr.txt \
> $TMP/"$NOW_HOUR"-summary-hour_count_list-new.txt
$GREPPATH -f $TMP/"$NOW_HOUR"-summary-hour_count_list-new.txt $TMP/"$NOW_HOUR"-summary-hour_count_list.txt \
| $AWKPATH -v OK_PER_HOUR=`echo $OK_PER_HOUR` -v IPFW_NUM=`echo $IPFW_NUM` -v IF_NAME=`echo $IF_NAME` \
-v PORT=`echo $PORT` -v IPFWPATH=`echo $IPFWPATH` \
'{ if ( $2 > OK_PER_HOUR ) {print IPFWPATH" add "IPFW_NUM" deny tcp from "$1"/24 to any "PORT" via "IF_NAME}}' \
> $TMP/hour_ipfw_add_cmd.txt
　
### to keep when reboot ###
$CATPATH $TMP/hour_ipfw_add_cmd.txt >> $TMP/total_hour_ipfw_add_cmd.txt
　
### check for double ###
$GREPPATH -F -v -f $TMP/ipfw_added.txt $TMP/"$NOW_HOUR"-summary-hour_count_list.txt \
| $AWKPATH -v OK_PER_HOUR=`echo $OK_PER_HOUR` '{ if ( $2 > OK_PER_HOUR ) {print $1}}' \
>> $TMP/ipfw_added.txt
　
###############################################################################
#
# Execute IPFW
#
###############################################################################
　
$DIFFPATH $TMP/min_ipfw_add_cmd_prev.txt $TMP/min_ipfw_add_cmd.txt|$GREPPATH '^>'
if [ "$?" = "0" ]; then
	$DATEPATH >> $TMP/defend-log
	$DATEPATH >> $TMP/defend-log.time
	$SHPATH $TMP/min_ipfw_add_cmd.txt >> $TMP/defend-log
	$AWKPATH '{print $7}' $TMP/min_ipfw_add_cmd.txt \
	| $AWKPATH -v LOOKUP=`echo $LOOKUP` -F/ '{print LOOKUP" "$1}'\
	 > $TMP/defend-name-log.cmd
	$CATPATH $TMP/min_ipfw_add_cmd.txt > $TMP/min_mailbody.txt
	$SHPATH $TMP/defend-name-log.cmd >> $TMP/min_mailbody.txt
	$MAILPATH -s "SSH attack detected by minutes" $MAILTO < $TMP/min_mailbody.txt
fi
　
$DIFFPATH $TMP/hour_ipfw_add_cmd_prev.txt $TMP/hour_ipfw_add_cmd.txt|$GREPPATH '^>'
if [ "$?" = "0" ]; then
	$DATEPATH >> $TMP/defend-log
	$DATEPATH >> $TMP/defend-log.time
	$SHPATH $TMP/hour_ipfw_add_cmd.txt >> $TMP/defend-log
	$MAILPATH -s "SSH attack detected by hour" $MAILTO < $TMP/hour_ipfw_add_cmd.txt
fi
　
###############################################################################
#
#Delete previous files
#
###############################################################################
　
rm -f $TMP/"$PREV_HOUR"*
rm -f $TMP/$LOCKFILE
　
exit

_ 結婚ねぇ。。

こりゃ双方の言い分に考えさせられる。。。

でも、

******************************************************
237 名前： 古代都市ワクテカ(埼玉県)[sage] 投稿日：2008/07/11(金) 10:15:24.73 ID:fSgBiVlt0
俺等って決して高望みなんてしてないよな？
女共が挙げる男の条件って全部無理じゃん。クリア出来るワケが無い。
　
俺等が求めてるのは常識の範囲内だぜ？
亭主をゴミのように扱わないとか、貯金を横領しないとか、それを「男のわがまま」
と言いますか？
******************************************************
泣ける。。。。・゜・(ノД`)・゜・。
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