从WordPress错误日志里发现SQL注入扫描攻击

admin

• 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。
  ; h9 @  V/ b! E5 J* S) Z
  8 X/ n3 p3 M/ z' J6 M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。
  
  ) {( P! b  n, s4 A8 K4 f. ?简单介绍一下这篇文章吧。
  ) _  R" J, ]# H0 `" d" _
  开启WP错误记录功能
  只需要修改wp-config.php的如下几行：
  & m4 k8 v' S: v5 v4 P
  @ini_set('log_errors','On'); @ini_set('display_errors','Off'); @ini_set('error_log','/home/example.com/logs/php_error.log');SQL 注入扫描
  + E4 v4 q( @/ o' {$ }6 _
  6 F0 K4 C2 Z. L' E[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--
  ( Z4 x5 c& F4 }( a[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
  8 K9 S8 q) O% g# \; u攻击者使用了类似"waitfor delay"和"benchmark"这样的函数来盲注。
  ' e) S" r7 A7 S( [6 d
  1 M& S( F8 j# a6 B! L1 K3 t[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\'--
  : t' v9 O# _# u( ?- s+ v' G[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)
    k1 y- ]# i  |+ [) {- \Google一下大规模扫描
  ) h  @- `' \% v! [, m
    n! Q: B8 w9 _
                             
  
  % e1 e9 T7 D2 n5 ^
  
                                 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 $search = ("http://www.google.com/search?q=".&key($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；
  / h, R, z0 v+ i: Y( C! `

  x% a& x, S# H7 A1 U2 g; y/ D8 v2 qCocoa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。​