勒索解密后oracle无法启动故障处理----惜分飞

客户linux平台被勒索病毒加密,其中有oracle数据库.客户联系黑客进行解密【勒索解密oracle失败】,但是数据库无法正常启动,dbv检查数据库文件报错

[oracle@hisdb ~]$ dbv file=system01.dbf DBVERIFY: Release 11.2.0.1.0 - Production on 星期一 11月 27 21:49:17 2023 Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved. DBV-00107: 未知标头格式 (31) (287942924)

对应的英文为:DBV-00107: Unknown header format (31) (287942924)，检查数据文件信息发现提示为 FILE NOT FOUND,使用脚本为:Oracle数据库异常恢复检查脚本(Oracle Database Recovery Check)检测结果
 

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通过分区确认是文件头损坏
 

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修复正确的文件头
 

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再次dbv检查数据文件

[oracle@hisdb ~]$ dbv file=system01.dbf DBVERIFY: Release 11.2.0.1.0 - Production on 星期一 11月 27 22:05:41 2023 Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved. DBVERIFY - 开始验证: FILE = /u01/app/oracle/oradata/system01.dbf 页 12800 标记为损坏 Corrupt block relative dba: 0x00403200 (file 1, block 12800) Bad header found during dbv: Data in bad block:  type: 88 format: 1 rdba: 0x33877808  last change scn: 0x257a.7b3a44e3 seq: 0xe8 flg: 0xe6  spare1: 0x4e spare2: 0x73 spare3: 0x0  consistency value in tail: 0x65251001  check value in block header: 0xc3b4  computed block checksum: 0x4ca7 DBVERIFY - 验证完成 检查的页总数: 13440 处理的页总数 (数据): 3297 失败的页总数 (数据): 0 处理的页总数 (索引): 2097 失败的页总数 (索引): 0 处理的页总数 (其他): 1441 处理的总页数 (段)  : 1 失败的总页数 (段)  : 0 空的页总数: 6604 标记为损坏的总页数: 1 流入的页总数: 0 加密的总页数        : 0 最高块 SCN            : 1667927064 (12.1667927064)

修复其他文件头,并dbv检查,发现均在12800位置损坏.尝试recover database恢复数据库,报ORA-00742 ORA-00312之类错误.

Sat Nov 25 17:03:39 2023 ALTER DATABASE RECOVER  database  Media Recovery Start  started logmerger process Parallel Media Recovery started with 40 slaves Sat Nov 25 17:03:40 2023 Recovery of Online Redo Log: Thread 1 Group 7 Seq 27220 Reading mem 0   Mem# 0: /u01/app/oracle/oradata/redo07.log Sat Nov 25 17:03:41 2023 Hex dump of (file 3, block 7) in trace file /u01/app/oracle/diag/rdbms/his/his/trace/his_pr0l_52669.trc Corrupt block relative dba: 0x00c00007 (file 3, block 7) Bad header found during media recovery Data in bad block:  type: 124 format: 7 rdba: 0x1698b845  last change scn: 0x4fa1.3eaa638f seq: 0x6 flg: 0x24  spare1: 0x26 spare2: 0x42 spare3: 0x0  consistency value in tail: 0xa39e1e01  check value in block header: 0x2ca4  computed block checksum: 0x3b25 Reading datafile '/u01/app/oracle/oradata/undotbs01.dbf' for corruption at rdba: 0x00c00007 (file 3, block 7) Reread (file 3, block 7) found same corrupt data (no logical check) Sat Nov 25 17:03:41 2023 Hex dump of (file 46, block 3) in trace file /u01/app/oracle/diag/rdbms/his/his/trace/his_pr0w_52691.trc Corrupt block relative dba: 0x0b800003 (file 46, block 3) Bad header found during media recovery Data in bad block:  type: 7 format: 7 rdba: 0x77922022  last change scn: 0xdff3.c40df5b6 seq: 0x6f flg: 0xe5  spare1: 0xcd spare2: 0x6d spare3: 0x83d7  consistency value in tail: 0x63c63d2c  check value in block header: 0xf662  computed block checksum: 0xec49 Data in bad block:  type: 135 format: 4 rdba: 0x45ad2864  last change scn: 0x9d7e.34949c73 seq: 0x32 flg: 0x3e  spare1: 0x89 spare2: 0x0 spare3: 0x9f9f  consistency value in tail: 0xa5807800  check value in block header: 0xb2c9  computed block checksum: 0x3aea Reread (file 5, block 11259) found same corrupt data (no logical check)  type: 214 format: 1 rdba: 0x0228dbe9 Bad header found during media recovery  last change scn: 0xed57.ca4f7559 seq: 0x9b flg: 0x4a Data in bad block:  spare1: 0x97 spare2: 0x77 spare3: 0x2bab  type: 33 format: 6 rdba: 0x018d584a  consistency value in tail: 0x359f90d6  last change scn: 0xaeb8.2fa361eb seq: 0x60 flg: 0x92  check value in block header: 0x6b26  spare1: 0xea spare2: 0xe spare3: 0xb405 block checksum disabled Reread (file 3, block 4) found same corrupt data (no logical check) Corrupt block relative dba: 0x0b800e61 (file 46, block 3681) Bad header found during media recovery Data in bad block:  type: 131 format: 6 rdba: 0xc7edd0fc  last change scn: 0xd319.d0e54941 seq: 0x6f flg: 0x6d  spare1: 0xe7 spare2: 0x82 spare3: 0x439f  consistency value in tail: 0x18dc47b6  check value in block header: 0xe9c8  computed block checksum: 0x204d Reread (file 46, block 3681) found same corrupt data (no logical check) Hex dump of (file 1, block 2017) in trace file /u01/app/oracle/diag/rdbms/his/his/trace/his_pr10_52699.trc Corrupt block relative dba: 0x004007e1 (file 1, block 2017) Bad header found during media recovery Data in bad block:  type: 159 format: 2 rdba: 0x52c5b2b0  last change scn: 0x2ed8.e0bc5af9 seq: 0x62 flg: 0xe9  spare1: 0x81 spare2: 0x1e spare3: 0xda98  consistency value in tail: 0xc5753dd3  check value in block header: 0x2bba  block checksum disabled Reading datafile '/u01/app/oracle/oradata/system01.dbf' for corruption at rdba: 0x004007e1 (file 1, block 2017) Reread (file 1, block 2017) found same corrupt data (no logical check) Media Recovery failed with error 742 Errors in file /u01/app/oracle/diag/rdbms/his/his/trace/his_pr00_52622.trc: ORA-00283: recovery session canceled due to errors ORA-00742: Log read detects lost write in thread %d sequence %d block %d ORA-00312: online log 7 thread 1: '/u01/app/oracle/oradata/redo07.log' ORA-10877 signalled during: ALTER DATABASE RECOVER  database  ...

尝试强制打开数据库报ORA-600 krsi_al_hdr_update.15,参考:Oracle断电故障处理中有类似报错

SQL> alter database open resetlogs; alter database open resetlogs * ERROR at line 1: ORA-00600: internal error code, arguments: [krsi_al_hdr_update.15], [4294967295], [], [], [], [], [], [], [], [], [], []

由于redo问题无法resetlogs成功,解决异常redo,再次尝试open库,由于undo坏块无法open成功

SQL> alter database open resetlogs; alter database open resetlogs * ERROR at line 1: ORA-01092: ORACLE instance terminated. Disconnection forced ORA-01578: ORACLE data block corrupted (file # 3, block # 1848) ORA-01110: data file 3: '/u01/app/oracle/oradata/undotbs01.dbf' Process ID: 55655 Session ID: 2623 Serial number: 5

解决undo异常,数据库open成功.导出客户需要数据,完成此次恢复工作