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。
  
  + `, U3 Q+ d) u' M6 _5 o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。
  5 b& P+ J7 W. }: O- u
  开启WP错误记录功能
  只需要修改wp-config.php的如下几行：
  & u7 p8 ?8 P+ ?. v
  @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
  
  # z$ d+ I9 X3 Q. Y" Z  d/ F" j[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\'
  * m. H+ s! n. s  X% d[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--
  - @3 i/ e+ ]4 N% t/ l, H* x[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。
  # i, ]) ~( g2 k* ^; _) h& K& n& aSQL盲注扫描
  . r6 K, ]6 L, R4 V4 `! Q3 Q4 R攻击者使用了类似"waitfor delay"和"benchmark"这样的函数来盲注。
  5 s- W. Q# O6 H) r# ?! _
  ) F. j6 ]$ o/ q& [5 G[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\'--
  . s6 A0 v( z, J0 q# R1 W[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)
  - I9 @' P8 c2 s& K+ ^/ RGoogle一下大规模扫描
  
  + Q: a$ D) k' e4 u/ N! F* [6 @$ d
  % P( ~2 ?. V) w+ a                           
  0 g9 A- I  D3 o7 b; L0 M, j
  ) t3 a# N, H$ U$ x  S
  * n/ {* Z& j$ E# R
  # y$ u3 F/ \9 ]                               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；
  ! N3 R; H5 L5 T/ S3 R& g0 T

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。​