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ÍøÂçÇå¾²Éó¼ÆÊÇÈ·±£ÍøÂçϵͳµÄÇå¾²ÐÔºÍÎȹÌÐÔµÄÖ÷ÒªÁ÷³Ì¡£ÔÚLinuxϵͳÉϾÙÐÐÍøÂçÇå¾²Éó¼Æ¿ÉÒÔ×ÊÖúÖÎÀíÔ±¼à¿ØÍøÂçÔ˶¯¡¢·¢Ã÷DZÔÚµÄÇå¾²ÎÊÌâºÍʵʱ½ÓÄɲ½·¥¡£±¾ÎĽ«ÏÈÈÝÔõÑùÔÚlinuxÉÏÉèÖÃÍøÂçÇå¾²Éó¼Æ£¬²¢Ìṩ´úÂëʾÀý×ÊÖú¶ÁÕ߸üºÃµØÃ÷È·¡£

Ò»¡¢×°ÖÃAuditd

Auditd ÊÇLinuxϵͳĬÈϵÄÇå¾²Éó¼Æ¿ò¼Ü¡£ÎÒÃÇÊ×ÏÈÐèҪװÖà Auditd¡£

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sudo apt-get install auditd

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sudo yum install audit

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¶þ¡¢ÉèÖÃAuditd

×°ÖÃÍê³Éºó£¬ÎÒÃÇÐèÒª¶Ô Auditd ¾ÙÐÐһЩ»ù±¾µÄÉèÖá£Ö÷ÒªµÄÉèÖÃÎļþÊÇ /etc/audit/auditd.conf¡£±à¼­¸ÃÎļþ£¬¿ÉÒÔµ÷½âһЩÉèÖÃÑ¡Ïî¡£

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# /etc/auditd.conf
# ×¢ÖØÕâÀïµÄ·¾¶¿ÉÄÜÒò²î±ðϵͳ¶øÓÐËù²î±ð

# ÍâµØÈÕÖ¾Îļþ´æ´¢µÄ·¾¶
log_file = /var/log/audit/audit.log

# ×î´óÈÕÖ¾Îļþ¾Þϸ
max_log_file = 50

# ×î´óÈÕÖ¾´æ´¢Ê±¼ä
max_log_file_action = keep_logs

# ÈÕÖ¾±£´æµÄÌìÊý
num_days = 30

# ¿ÕÏÐʱ¼ä£¨Ã룩
idletime = 600

# ·¢Ã÷¹ÊÕϺó×Ô¶¯×èÖ¹
space_left_action = email

# ·¢Ã÷¹ÊÕϺóʵʱ֪ͨµÄÓÊÏäµØµã
admin_space_left_action = root@localhost

# É趨Éó¼ÆϵͳʱÌØÊâÌí¼ÓµÄÏîÄ¿
# ÒÔÏÂÊÇÒ»¸öʾÀýÉèÖã¬Æ¾Ö¤ÐèÒª¿É×ÔÐе÷½â
# -a always,exit -F arch=b64 -S open,creat,truncate,ftruncate,openat,open_by_handle_at,openat2 -F exit=-EACCES -F auid>=1000 -F auid!=-1 -k access

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×¢ÖØ£¬ÄãÐèҪƾ֤ϵͳºÍÐèÇó×ÔÐе÷½âÉèÖá£ÔÚÍê³ÉÉèÖúó£¬ÉúÑÄÎļþ²¢ÖØÐÂÆô¶¯ auditd ЧÀÍ¡£

sudo systemctl restart auditd

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Èý¡¢³£ÓÃAuditdÏÂÁî

ÉèÖÃÍê³Éºó£¬ÎÒÃÇ¿ÉÒÔʹÓÃһЩ³£ÓÃµÄ Auditd ÏÂÁîÀ´¼à¿ØÍøÂçÔ˶¯ºÍÉó¼ÆÈÕÖ¾¡£

audispd-plugins ²å¼þ

audispd-plugins ÊÇÒ»¸ö Auditd µÄ²å¼þ£¬¿ÉÒÔ½« Auditd ÈÕ־ת·¢µ½ÆäËû¹¤¾ß£¬Èç Syslog »ò Elasticsearch µÈ¡£

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sudo apt-get install audispd-plugins

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sudo yum install audispd-plugins

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ÔÚÉèÖÃÎļþ /etc/audisp/plugins.d/syslog.conf ÖУ¬Äã¿ÉÒÔÖ¸¶¨ÈÕ־ת·¢µÄÄ¿µÄ¡£ÔÚÒÔÏÂʾÀýÖУ¬ÎÒÃǽ«ÈÕ־ת·¢µ½ Syslog£º

active = yes
direction = out
path = /sbin/audispd-in_syslog
type = builtin
args = LOG_INFO
format = string

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ausearch

ausearch ÊÇÒ»¸ö Auditd µÄÏÂÁîÐй¤¾ß£¬¿ÉÒÔÅÌÎÊ Audit ÈÕÖ¾¡£ÒÔÏÂÊǼ¸¸ö³£ÓõÄÏÂÁîʾÀý£º

# ÅÌÎÊËùÓÐÊÂÎñ
sudo ausearch -m all

# ÅÌÎÊָ׼ʱ¼ä¶ÎµÄÈÕÖ¾
sudo ausearch --start "10 minutes ago" --end "now"

# ƾ֤Óû§ÅÌÎÊÈÕÖ¾
sudo ausearch -ua username

# ƾ֤Îļþ·¾¶ÅÌÎÊÈÕÖ¾
sudo ausearch -f /path/to/file

# ƾ֤ϵͳŲÓÃÅÌÎÊÈÕÖ¾
sudo ausearch -sc open

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aureport

aureport ÊÇÒ»¸ö Auditd µÄ±¨¸æ¹¤¾ß£¬¿ÉÒÔÌìÉúÖÖÖÖ±¨¸æ¡£ÒÔÏÂÊǼ¸¸ö³£ÓõÄÏÂÁîʾÀý£º

# ÌìÉúËùÓеÄÊÂÎñ±¨¸æ
sudo aureport

# ÌìÉúÎļþÏà¹ØµÄÊÂÎñ±¨¸æ
sudo aureport -f

# ÌìÉúÓû§Ïà¹ØµÄÊÂÎñ±¨¸æ
sudo aureport -i

# ÌìÉúϵͳŲÓõÄÊÂÎñ±¨¸æ
sudo aureport -c

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ÒÔÏÂÊÇÒ»¸öʾÀýÉèÖã¬ÓÃÓÚÉó¼ÆÓû§µÄµÇ¼ºÍÏÂÁîÖ´ÐУº

sudo auditctl -a always,exit -F arch=b64 -S execve -k command
sudo auditctl -a always,exit -F arch=b64 -S execveat -k command
sudo auditctl -a always,exit -F arch=b32 -S execve -k command
sudo auditctl -a always,exit -F arch=b32 -S execveat -k command
sudo auditctl -a always,exit -F arch=b64 -S sendto -F auid>=500 -F auid!=4294967295 -k connect

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