这篇文章介绍了当WordPress开启错误记录以后，根据error_log来发现SQL注入攻击的思路。
吸引Cocoa的是这个博客其实是TrustWave公司下属的一个叫Spiderlab团队的官方博客，貌似比较有意思。例如它提到了Honeypot Alert这个标签里的文章都是分析他们一个Web蜜罐的Apache access_log日志的。
简单介绍一下这篇文章吧。
开启WP错误记录功能
只需要修改wp-config.php的如下几行：
@ini_set('log_errors','On');
@ini_set('display_errors','Off');
@ini_set('error_log','/home/example测试数据/logs/php_error.log');
SQL 注入扫描
[07-Dec-2012 02:40:49] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE id = -1\'' at line 1 for query SELECT text, author_id, date FROM WHERE id = -1\'
[07-Dec-2012 02:40:50] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE id = 999999.9 UNION ALL SELECT 0x31303235343830303536--' at line 1 for query SELECT text, author_id, date FROM WHERE id = 999999.9 UNION ALL SELECT 0x31303235343830303536--
[07-Dec-2012 02:40:53] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE id = 999999.9 UNION ALL SELECT 0x31303235343830303536,0x313032353438303035' at line 1 for query SELECT text, author_id, date FROM WHERE id = 999999.9 UNION ALL SELECT 0x31303235343830303536,0x31303235343830303536--
上面的日志就是在暴力猜解表的列数，那个巨大的十六进制值会被解析成null。
SQL盲注扫描
攻击者使用了类似"waitfor delay"和"benchmark"这样的函数来盲注。
[07-Dec-2012 02:43:21] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE id = -1; if (1=1) waitfor delay \'00:00:05\'--' at line 1 for query SELECT text, author_id, date FROM WHERE id = -1; if (1=1) waitfor delay \'00:00:05\'--
[07-Dec-2012 02:43:27] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE id = -1 and if(1=1,BENCHMARK(8623333, MD5 (0x41)),0)' at line 1 for query SELECT text, author_id, date FROM WHERE id = -1 and if(1=1,BENCHMARK(8623333,MD5(0x41)),0)
Google一下大规模扫描
僵尸网络控制着可能使用被感染主机来识别潜在的目标。下面是该公司的蜜罐捕获到的一个RFI（远程文件包含）攻击代码里的片段：
sub google() {
my @list;
my $key = $_[0];
for (my $i=0; $i<=400; $i+=10){
my $search = ("http://HdhCmsTestgoogle测试数据/search?q=".&key($key)."&num=100&filter=0&start=".$i);
my $res = &search_engine_query($search);
while ($res =~ m/<a href="\"?http:\/\/([^">\"]*)\//g) {
if ($1 !~ /google/){
my $link = $1;
my @grep = &links($link);
push(@list,@grep);
}
}
}
return @list；
Cocoa总结：文章比较简单，但是从日志来检测攻击貌似是目前流行的一个方向。
参考资料：
[Honeypot Alert] SQL Injection Scanning Detected in WordPress Error Logs
SpiderLabs Anterior
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