tab$被恶意删除sys用户之外记录

数据库open成功，但是alert日志报大量ORA-00600错误

Sun Apr 14 14:30:46 2019
SMCO started with pid=53, OS id=6761 
Completed: ALTER DATABASE OPEN /* db agent *//* {1:65047:2} */
Sun Apr 14 14:30:49 2019
Starting background process CJQ0
Sun Apr 14 14:30:49 2019
CJQ0 started with pid=54, OS id=6776 
Setting Resource Manager plan SCHEDULER[0x32DF]:DEFAULT_MAINTENANCE_PLAN via scheduler window
Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameter
Sun Apr 14 14:30:52 2019
Starting background process VKRM
Sun Apr 14 14:30:52 2019
VKRM started with pid=37, OS id=6809 
Sun Apr 14 14:30:54 2019
Errors in file /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/trace/xifenfei1_j000_6811.trc  (incident=288633):
ORA-00600: internal error code, arguments: [kkpo_rcinfo_defstg:delseg], [84638], [], [], [], [], [], [], [], [], [], []
Incident details in: /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/incident/incdir_288633/xifenfei1_j000_6811_i288633.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Errors in file /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/trace/xifenfei1_j000_6811.trc:
ORA-00600: internal error code, arguments: [kkpo_rcinfo_defstg:delseg], [84638], [], [], [], [], [], [], [], [], [], []
ORA-06512: at "APEX_030200.WWV_FLOW_MAIL", line 695
ORA-06512: at line 1
Sun Apr 14 14:30:57 2019
Errors in file /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/trace/xifenfei1_j000_7491.trc  (incident=288658):
ORA-00600: 内部错误代码, 参数: [16659], [kqldtu], [INS], [0], [206196], [], [], [], [], [], [], []
Incident details in: /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/incident/incdir_288658/xifenfei1_j000_7491_i288658.trc
Sun Apr 14 14:34:10 2019
Dumping diagnostic data in directory=[cdmp_20190414143410], requested by (instance=1, osid=7491 (J000)), summary=[incident=288658].
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Errors in file /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/trace/xifenfei1_j000_7491.trc:
ORA-00600: 内部错误代码, 参数: [16659], [kqldtu], [INS], [0], [206196], [], [], [], [], [], [], []
ORA-06512: 在 "WEBCSMS.P_YGERROR", line 3
Sun Apr 14 14:39:08 2019
Errors in file /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/trace/xifenfei1_j000_8515.trc  (incident=288593):
ORA-00600: 内部错误代码, 参数: [kdfReserveSingle_1], [0], [65280], [], [], [], [], [], [], [], [], []
Incident details in: /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/incident/incdir_288593/xifenfei1_j000_8515_i288593.trc
ORA-06512: 在 line 1
Sun Apr 14 14:52:14 2019
Errors in file /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/trace/xifenfei1_j001_11062.trc  (incident=288705):
ORA-00600: internal error code, arguments: [16607], [0x3CFB04C90], [257], [9], [0x000000000], [], [], [], [], [], [], []
Incident details in: /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/incident/incdir_288705/xifenfei1_j001_11062_i288705.trc
Errors in file /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/trace/xifenfei1_ora_16712.trc  (incident=288597):
ORA-00600: 内部错误代码, 参数: [16607], [0x3C7CEA678], [1281], [9], [0x000000000], [], [], [], [], [], [], []
Incident details in: /oracle/oracle/oracle/diag/rdbms/xifenfei/xifenfei1/incident/incdir_288597/xifenfei1_ora_16712_i288597.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.

报错比较多，客户还反馈登录数据库之后，发现所有的表都丢失。第一反应可能数据字典损坏了，然后让客户查看备库，现在dg的备库也一样表都丢失了，进一步确认字典可能异常，让客户提供system文件进行本地分析.发现DBMS_SUPPORT_DBMONITOR触发器调用DBMS_SUPPORT_DBMONITORP存储过程,和警告：互联网中有oracle介质被注入恶意程序导致—ORA-600 16703中的名称非常类似,但是有点不一样,以前的恶意脚本中都是被注入并且触发之后，数据库无法正常启动，这次数据库能够正常open成功.分析恶意脚本,确认原因



确实这次的恶意脚本是在2016年8月份被创建在库中,在600天之后重启被触发,而且是删除非sys的tab$中记录.知道了恶意脚本的源头,那恢复就比较容易,直接通过批量bbed程序对tab$反删除可以实现比较完美恢复.原则上这样的故障可以实现数据库完美恢复,原库继续使用.