Splunk奇巧淫技那些事
0x00 Splunk 数据转发、过滤和处理
A Splunk 配置syslog数据转发
配置文件所在节点即工作节点:HF OR Indexer
outputs.conf
[syslog]
defaultGroup=syslogoutputsGroup
[syslog:syslogoutputsGroup]
type = udp
server = 10.203.19.22:514
props.conf
[sourcetype::cosmo_syslog]
TRANSFORMS-syslog = splunk_syslog_outpust
[sourcetype::cosmo_cisco:asa]
TRANSFORMS-cisco-asa = splunk_syslog_outpust
[sourcetype::cosmo_cisco_asa_anquan]
TRANSFORMS-cisco_asa_anquan] = splunk_syslog_outpust
transforms.conf
[splunk_syslog_outpust]
REGEX = .
DEST_KEY = _SYSLOG_ROUTING
FORMAT = syslogoutputsGroup
B Splunk 过滤数据
工作节点:Indexer OR HF
设置transforms.conf创建过滤数据规则
问题:将普罗米修斯数据接入到splunk系统中发现数据量非常庞大(有1560个指标项),真正使用到的指标项不到100个,需要过滤掉不需要的指标
props.conf
[prometheus_filter]
# sourcetype解析规则
TIME_FORMAT = %s%3N
TIME_PREFIX = }\s[\d\-\.]+\s
NO_BINARY_CHECK = true
SHOULD_LINEMERGE = false
pulldown_type = 1
category = Metrics
EXTRACT-metric_name,num1,num2 = ^(?P<metric_name>[^\{]+)[^\}\n]*\}\s+(?P<num1>[^ ]+)\s+(?P<num2>.+)
TRANSFORMS-set = setnull,conform # 指定transforms.conf 配置内容
transforms.conf
[conform]
REGEX = container_cpu_load_average_10s|container_cpu_usage_seconds_total|container_fs_limit_bytes|container_fs_usage_bytes|container_memory_cache|container_memory_usage_bytes|container_memory_working_set_bytes|container_network_receive_bytes_total|container_network_transmit_bytes_total|container_spec_memory_limit_bytes|jvm_gc_collection_seconds_count|jvm_gc_collection_seconds_sum|jvm_memory_bytes_used|jvm_memory_pool_bytes_max|jvm_memory_pool_bytes_used|jvm_threads_current|jvm_threads_deadlocked|jvm_threads_peak|kube_pod_container_status_ready|kube_pod_container_status_running|kube_pod_container_status_terminated|kube_pod_container_status_waiting|machine_cpu_cores|machine_memory_bytes|mysql_global_status_aborted_clients|mysql_global_status_commands_total|mysql_global_status_innodb_data_fsyncs|mysql_global_status_innodb_data_reads|mysql_global_status_innodb_data_writes|mysql_global_status_select_full_join|mysql_global_status_select_scan|mysql_global_status_slow_queries|mysql_global_status_sort_scan|mysql_global_status_threads_connected|mysql_global_status_threads_created|nginx_connections_accepted|nginx_connections_active|nginx_connections_handled|nginx_http_requests_total|node_network_info|rabbitmq_channelsTotal|rabbitmq_connectionsTotal|rabbitmq_consumersTotal|rabbitmq_exchangesTotal|rabbitmq_fd_total|rabbitmq_fd_used|rabbitmq_queue_messages_ready_total|rabbitmq_queue_messages_total|rabbitmq_queue_messages_unacknowledged_total|rabbitmq_queuesTotal|rabbitmq_sockets_total|rabbitmq_sockets_used|rabbitmq_up|redis_blocked_clients|redis_commands_processed_total|redis_connected_clients|redis_evicted_keys_total|redis_expired_keys_total|redis_keyspace_hits_total|redis_keyspace_misses_total|redis_memory_used_bytes|zk_max_latency|zk_num_alive_connections|zk_open_file_descriptor_count|zk_outstanding_requests|zk_up|zk_watch_count|zk_znode_count
# 需要过滤的正则表达式:匹配内容为_raw内容 math(_raw,REGEX)
DEST_KEY = queue
FORMAT = indexQueue # 传递到indexQueue
[setnull]
REGEX = .
DEST_KEY = queue
FORMAT = nullQueue # 传递到nullQueue
C Splunk 基于Host 字段过滤数据
实现原理:
forwarder采集数据发送到HeavyForwarder上进行解析,由此在HeavyForwarder创建数据过滤规则。
- 编辑props.conf
使用SSH工具登录到Heavy Forwarder服务器()
编辑/opt/splunk/etc/apps/Splunk_TA_windows/local/props.conf(如文件不存在则新建)。在文件末尾添加以下内容:
[host::example-hostname] # example-hostname 为排除数据的agent主机名
TRANSFORMS-filterhostname = conform,setnull
[host::example-IP] # example-IP 为排除数据的agentIP地址
TRANSFORMS-filterIP = conform,setnull
- 编辑transforms.conf
编辑/opt/splunk/etc/apps/Splunk_TA_windows/local/transforms.conf(如文件不存在则新建)。在文件末尾添加以下内容:
[conform]
REGEX = .
DEST_KEY = queue
FORMAT = indexQueue
[setnull]
REGEX = ((\<EventID\>4703\<\/EventID\>)|(EventCode=4703))
DEST_KEY = queue
FORMAT = nullQueue
- 访问HF refresh web界面刷新配置文件
http://HeavyForwarderIP:8000/zh-CN/debug/refresh
需要使用admin账号登入
界面如下:
完成效果如下:
D Splunk 数据拆分成不同的sourcetyp
不同种类的网络安全数据全部通过UDP514端口接收,创建采集配置无法指定多个sourcetype,故通过source字段拆分sourcetype
- 编辑props.conf
[source::example-udp:514]
SHOULD_LINEMERGE = false
TRANSFORMS-changesourcetype = mcafee_ips:syslog,f5_bigip:syslog,asiainfo:tda
- 编辑transforms.conf
[asiainfo:tda]
REGEX = CEF:\d\|(Asiainfo Security|AsiaInfo|Trend Micro)\|(Control Manager|Deep Discovery Analyzer|Deep Security Agent|Deep Security Manager|TDA|Deep Discovery Email Inspector)
FORMAT = sourcetype::asiainfo:tda
DEST_KEY = MetaData:Sourcetype
[f5_bigip:syslog]
REGEX = \tASM\:CEF\:\d|F5|ASM
FORMAT = sourcetype::f5_bigip:syslog
DEST_KEY = MetaData:Sourcetype
[mcafee_ips:syslog]
REGEX = SyslogAlertForwarder:\s\|\d*
FORMAT = sourcetype::mcafee:ips:syslog
DEST_KEY = MetaData:Sourcetype
0x01 SplunkUF修改8089端口(管理端口)
A 修改web.conf配置文件
查看/opt/splunkforwarder/etc/system/local/web.conf文件是否存在
[root@linux_mysql local]# ll /opt/splunkforwarder/etc/system/local/
web.conf
-rw-r--r--. 1 root root 52101 Jul 4 00:07 /opt/splunkforwarder/etc/system/local/web.conf
[root@linux_mysql local]#
如果web.conf文件不存在将../default/下面的web.conf 复制到local目录下
cd /opt/splunkforwarder/etc/system/local/
cp ../default/web.conf .
找到mgmtHostPort配置项并修改
# Version 7.2.5
# DO NOT EDIT THIS FILE!
# Changes to default files will be lost on update and are difficult to
# manage and support.
#
# Please make any changes to system defaults by overriding them in
# apps or $SPLUNK_HOME/etc/system/local
# (See "Configuration file precedence" in the web documentation).
#
# To override a specific setting, copy the name of the stanza and
# setting to the file where you wish to override it.
#
# This file contains possible attributes and values you can use to configure Splunk's web interface.
#
[default]
[settings]
# enable/disable the appserver
startwebserver = 1
# port number tag is missing or 0 the server will NOT start an http listener
# this is the port used for both SSL and non-SSL (we only have 1 port now).
httpport = 8000
# this determines whether to start SplunkWeb in http or https.
enableSplunkWebSSL = false
# location of splunkd; don't include http[s]:// in this anymore.
#mgmtHostPort = 127.0.0.1:8089--此项配置
mgmtHostPort = 127.0.0.1:8099
# list of ports to start python application servers on (although usually
# one port is enough) Set to 0 to instead run the application server
# directly as the web front end on 'httpport', separate from splunkd.
appServerPorts = 8065
# default timeout, in seconds, when communicating with splunkd
splunkdConnectionTimeout = 30
# enable/disable custom netloc when using http client
enableSplunkWebClientNetloc = False
# SSL certificate files.
privKeyPath = $SPLUNK_HOME/etc/auth/splunkweb/privkey.pem
serverCert = $SPLUNK_HOME/etc/auth/splunkweb/cert.pem
B 重启splunkforwarder服务
/opt/splunkforwarder/bin/splunk start
C 查看端口是否修改成功
ps -ef|grep splunk
[root@linux_mysql local]# ps -ef|grep splunk
root 7698 1 0 00:10 ? 00:00:01 splunkd --under-systemd --systemd-delegate=yes -p 8099 _internal_launch_under_systemd
root 7723 7698 0 00:10 ? 00:00:00 [splunkd pid=7698] splunkd --under-systemd --systemd-delegate=yes -p 8099 _internal_launch_under_systemd [process-runner]
root 7949 5126 0 00:28 pts/0 00:00:00 grep --color=auto splunk
[root@linux_mysql local]#
0x02 Splunk_TA_nix不能执行CPU.sh问题
问题:Splunk_TA_nix add-on下发到Linux Centos7系统上没有采集到cpu性能数据,发现缺少相关命令需要在linux系统上安装以下命令
yum install sysstat
yum install sar
yum insatll mpstat
0x03 SplunkUF系统克隆导致主机名和GUID相同
A 方式一
删除 $SPLUNK$/etc/instance.cfg (里面记录了guid,也就是客户端名称)
删除 server.conf里面的实例名称记录,inputs.conf里面的主机名称记录
重启 forwarder服务
B 方式二
重新安装SplunkUniversalForwarder
# 例如: 安装目录为/tpdata
/tpdata/splunkforwarder/bin/splunk stop
rm -rf /tpdata/splunkforwarder
tar zxvf /tpdata/splunkforwarder-6*.tgz -C /tpdata
/tpdata/splunkforwarder/bin/splunk start --answer-yes --no-prompt --accept-license
/tpdata/splunkforwarder/bin/splunk set deploy-poll 10.21.8.228:8089 -auth admin:changeme
/tpdata/splunkforwarder/bin/splunk restart
C 方法三
基于splunk clone-prep-clear-config命令清除splunk配置信息创建Linux和Windows脚本
提示:不能修改脚本名称,查找进程是否运行使用Splunk关键字进行查找
linux:clear-Splunkforwarder-config.sh
#!/bin/sh
#
# Time : 2022/01/12 22:41:30
# Author : Hesc
# Version : 1.0
# Splunkforwarder安装路径
Splunkforwarder_DIR="/opt"
# Splunkforwarder PID
Splunkforwarder_PID=`ps -ef|grep splunk | grep -v grep | awk '{print $2}'`
if [ -n "$Splunkforwarder_PID" ]; then
echo -e "\033[42;30mINFO: Splunkforwarder guid info:\033[0m"
cat $Splunkforwarder_DIR/splunkforwarder/etc/instance.cfg
echo -e "\033[41;30mERROR: Splunkforwarder is runing, Stop Splunkforwarder!\033[0m"
$Splunkforwarder_DIR/splunkforwarder/bin/splunk stop # 停止splunkforwarder服务
echo -e "\033[42;30mINFO: clear Splunkforwarder config!\033[0m"
$Splunkforwarder_DIR/splunkforwarder/bin/splunk clone-prep-clear-config # 清除splunkforwarder配置
echo -e "\033[42;30mINFO: Start Splunkforwarder\033[0m"
$Splunkforwarder_DIR/splunkforwarder/bin/splunk start # 启动splunkforwarder服务
echo -e "\033[42;30mINFO: Update Splunkforwarder guid info:\033[0m"
cat $Splunkforwarder_DIR/splunkforwarder/etc/instance.cfg
else
echo -e "\033[42;30mINFO: Splunkforwarder guid info:\033[0m"
cat $Splunkforwarder_DIR/splunkforwarder/etc/instance.cfg
echo -e "\033[42;30mINFO: Splunkforwarder is not runing, clear Splunkforwarder config!\033[0m"
$Splunkforwarder_DIR/splunkforwarder/bin/splunk clone-prep-clear-config # 清除splunkforwarder配置
echo -e "\033[42;30mINFO: Start Splunkforwarder\033[0m"
$Splunkforwarder_DIR/splunkforwarder/bin/splunk start # 启动splunkforwarder服务
echo -e "\033[42;30mINFO: Update Splunkforwarder guid info:\033[0m"
cat $Splunkforwarder_DIR/splunkforwarder/etc/instance.cfg
fi
Windows:clear-Splunkforwarder-config.bat
@echo off
:: Time : 2022/01/12 22:41:30
:: Author : Hesc
:: Version : 1.0
set SplunkUniversalForwarder_install_dir="C:\Program Files"
tasklist|find /i "splunkd.exe"
if %errorlevel%==0 (
echo "ERROR: SplunkUniversalForwarder is runing,Stop SplunkUniversalForwarder !!"
"C:\Program Files\SplunkUniversalForwarder\bin\splunk.exe" stop
"C:\Program Files\SplunkUniversalForwarder\bin\splunk.exe" clone-prep-clear-config
"C:\Program Files\SplunkUniversalForwarder\bin\splunk.exe" start
) else (
echo "INFO: SplunkUniversalForwarder is not runing,clear SplunkUniversalForwarder config !!"
"C:\Program Files\SplunkUniversalForwarder\bin\splunk.exe" clone-prep-clear-config
"C:\Program Files\SplunkUniversalForwarder\bin\splunk.exe" start
)
pause
0x04 修改每个CPU的最大并发搜索次数
vim /opt/splunk/system/local/limits.conf cat /opt/splunk/system/local/limits.conf [search] max_searches_per_cpu = 1 # 默认值为1 # 每个CPU的最大并发搜索次数
0x05 关于Splunk 重启日志也会存放在index里面
index="_internal" source="/opt/splunk/var/log/splunk/splunkd.log" start
0x06 查看告警邮箱是否发送
INFO:为正常发送,ERROR:为发送失败 >>要检查ERROR报错的问题
index ="_internal" source="/opt/splunk/var/log/splunk/python.log" "mail"
0x07 关于字段重命名注意点
字段重命名:不能设置多个字段名称重命名为同一个字段名称
重写字段值:如果有设置多个字段名称重命名为同一个字段名称,使用勾选此选项字段重命名。
0x08 仪表板设置隐藏图表(并传递传递参数)
<row>
<panel> depends="$range$"
<table>
<title>僵尸进程详情</title>
</table>
</panel>
</row>
0x09 Splunk web刷新配置文件url
http://192.168.10.9:8000/zh-CN/debug/refresh
0x0a 修改index存放路径
A 修改splunk-launch.conf配置文件
] vim /opt/splunk/splunk/etc/splunk-launch.conf
--编辑splunk-launch文件
] cat /opt/splunk/splunk/etc/splunk-launch.conf
# Version 7.2.5
# Modify the following line to suit the location of your Splunk install.
# If unset, Splunk will use the parent of the directory containing the splunk
# CLI executable.
#
# SPLUNK_HOME=/opt/splunk-home
# By default, Splunk stores its indexes under SPLUNK_HOME in the
# var/lib/splunk subdirectory. This can be overridden
# here:
# SPLUNK_DB=/opt/splunk-home/var/lib/splunk
# 添加以下内容
SPLUNK_DB=/opt/splunk/splunk/data
# Splunkd daemon name
SPLUNK_SERVER_NAME=Splunkd
# Splunkweb daemon name
SPLUNK_WEB_NAME=splunkweb
# If SPLUNK_OS_USER is set, then Splunk service will only start
# if the 'splunk [re]start [splunkd]' command is invoked by a user who
# is, or can effectively become via setuid(2), $SPLUNK_OS_USER.
# (This setting can be specified as username or as UID.)
# SPLUNK_OS_USER
B 创建数据保存目录
] mkdir data
--创建data目录
] splunk stop
--停止splunk服务
] mv /opt/splunk/splunk/var/lib/splunk /opt/splunk/splunk/data/
--将/opt/splunk/splunk/var/lib/splunk目录下的文件移动到/opt/splunk/splunk/data/目录下
] splunk start
--启动服务
0x0b Splunk License 文件保存路径
$SPLUNK_HOME/etc/licenses/enterprise/Splunk.License.lic
0x0c outputlookup小技巧
index=wineventlog
| lookup AXA_Server_List Segment as 源网络地址 OUTPUT 分公司区域 机构 省份 Region
| search Region=*
| stats count by 分公司区域 省份 Region 源网络地址 username
| search username!="-" username !="ANONYMOUS LOGON" username!=admin*
| rename 源网络地址 as IP username as nt_host
| rex field=nt_host "(?P<nt_host>[^$]*)"
| eval nt_host=upper(nt_host)
| lookup AXA_ServerIP_List.csv IP nt_host OUTPUT IP as ip
| search NOT ip=*
| fields - ip count
| outputlookup AXA_ServerIP_List.csv append=true
0x0d 创建UF资产表SPL
index="_internal" sourcetype="splunkd" source="*metrics.log" fwdType=uf source="/opt/splunk/var/log/splunk/metrics.log"
| stats count by hostname,sourceIp,os,arch,guid
0x0e Splunk enterprise security CLI安装命令
curl -k -u admin:Eccom@123 https://localhost:8089/services/apps/local -d filename="true" -d name="/opt/splunk-enterprise-security_700.spl" -d update="true" -v
0x0f Splunk 修改密码
A Splunk 7.1以下版本修改admin密码
如果忘记管理员密码,可以重置。需要有服务器的访问权限。
方法
1.将\$SPLUNK_HOME/etc/passwd文件重命名为passwd.bak
] mv /opt/splunk/etc/passwd passwd.bak
2.重新启动Splunk,此时登录Splunk Web之后,所使用的密码则为初始账号密码:admin changeme
] /opt/splunk/bin/splunk restatr
B Splunk 7.1以上版本修改admin密码
如果您使用的是Splunk 7.1以上的版本,需要使用<user-seed.conf 创建管理员凭据>方法重置admin密码。
在7.1以前的版本中,缺少$SPLUNK_HOME/etc/passwd
文件, Splunk会将密码重置为"changeme"。但是在7.1上版本此方法已失效。
1. 您需要保存$SPLUNK_HOME/etc/passwd
文件,并删除原始文件。
mv $SPLUNK_HOME/etc/passwd $SPLUNK_HOME/etc/passwd-bak
2.编辑$SPLUNK_HOME/etc/system/local/user-seed.conf
配置文件(不存在则新建)。
添加一个名为[user_info]
章节,并指定管理员用户和您希望使用的密码。
[user_info]
USERNAME=admin
PASSWORD=password
3.然后重新启动Splunk,将会生成一个新的$SPLUNK_HOME/etc/passwd
文件。
splunk restart
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