如何获得一个Section对象的内核转储
问题描述：
从3thParty供应商的部分对象命名为rpsPdf10.mutex的内容和它的用途是通过编写一个布尔标志，它模仿一个信号。如何获得一个Section对象的内核转储
使用LiveKd以及来自SO的大量帮助，我发布了以下命令，试图获取此Section对象的详细信息。
0: kd>!process 0 0 3thParty.exe
...
PROCESS fffffa800ea80060
SessionId: 0 Cid: 0a00 Peb: fffdf000 ParentCid: 014c
DirBase: 99349000 ObjectTable: fffff8a004448bf0 HandleCount: 338.
Image: 3thParty.exe
...
0: kd> !handle 0 7 fffffa800ea80060
...
08 fffff8a012e26710 Section rpsPdf10.mutex
...
0: kd> !object fffff8a012e26710
Object: fffff8a012e26710 Type: (fffffa800cd7cea0) Section
ObjectHeader: fffff8a012e266e0 (new version)
HandleCount: 38 PointerCount: 39
Directory Object: fffff8a00a980080 Name: rpsPdf10.mutex
0: kd> dt -r1 nt!_SECTION_OBJECT 0xfffff8a012e26710
+0x000 StartingVa : 0x00000022`00000100 Void
+0x008 EndingVa : 0x00000000`0008dfb0 Void
+0x010 Parent : 0xfffffa80`c0000001 Void
+0x018 LeftChild : (null)
+0x020 RightChild : 0xfffffa80`00000034 Void
+0x028 Segment : 0xfffff8a0`102d7820 _SEGMENT_OBJECT
+0x000 BaseAddress : 0xfffffa80`0fbed900 Void
+0x008 TotalNumberOfPtes : 1
+0x010 SizeOfSegment : _LARGE_INTEGER 0x1
+0x018 NonExtendedPtes : 0x1000
+0x01c ImageCommitment : 0
+0x020 ControlArea : (null)
+0x028 Subsection : (null)
+0x030 MmSectionFlags : 0xfffffa80`10987b10 _MMSECTION_FLAGS
+0x038 MmSubSectionFlags : 0x00000000`03400000 _MMSUBSECTION_FLAGS
所有这些对我来说都是正确的，但我如何找到该部分的内容？需要注意的
答
点在earlier answer机是32位和OS是Win7和WinDbg的版本是内幕预览16278个命令如果有任何拱依赖
的走拱无关，指针运算通过是活的二进制不在倾倒，因为是我要补充这个答案后
获取内容构成部分很公平的机会，页面可能已经在转储和演示调出可能是不确定的是有点令人费解
（有几种类型的部分如
1）ALPC部分（com objects）
2）文件备份第
3）PageFileBacked科等
下面演练为页面文件备份部（最常见的类型）
假设你编译和执行下面
代码的exe将创建一个SectionObject在全局命名空间
和内容将被PagingFile备份，将等待 按键
#include <windows.h>
#include <stdio.h>
#define bsize 256
int main(){
char szMsg[]={"Message from blabb to lieven from Stack Overflow."};
int ret = NULL;
HANDLE hMap = CreateFileMapping((HANDLE)-1,NULL,4,0,bsize,"Global\\MyMap");
if(hMap){
PCHAR buff = (PCHAR) MapViewOfFile(hMap,0xf001f,0,0,bsize);
if(buff){
CopyMemory(buff, szMsg, sizeof(szMsg));
ret = getchar();
UnmapViewOfFile(buff);
}
CloseHandle(hMap);
}
return ret;
}
地设想ming该进程正在等待按键启动livekd或设置一个实时内核调试连接，如果它正在远程计算机上运行/ vm
C：> livekd -k“c：\ Program Files \ Windows Kits \ 10 \调试器\ 86 \的Cdb.exe”
LiveKd v5.62 - Execute kd/windbg on a live system
Launching c:\Program Files\Windows Kits\10\Debuggers\x86\cdb.exe:
Microsoft (R) Windows Debugger Version 10.0.16278.1000 X86
得到的_EPROCESS并设置背景
kd> !process 0 0 secobj.exe
PROCESS 8605ab28 SessionId: 1 Cid: 0fbc Peb: 7ffd9000 ParentCid: 0af4
DirBase: 7e2712e0 ObjectTable: c288ba00 HandleCount: 9.
Image: secobj.exe
kd> .process /p /r 8605ab28
Implicit process is now 8605ab28
kd> ? @$proc
Evaluate expression: -2046448856 = 8605ab28
kd> ?? (char *)@$proc->ImageFileName
char * 0x8605ac94
"secobj.exe"
找，因为我们 部分类型部分的当前进程通知句柄全球命名南协商WinDbg的解密，对我们
kd> !handle 0 3 @$proc Section
Searching for handles of type Section
PROCESS 8605ab28 SessionId: 1 Cid: 0fbc Peb: 7ffd9000 ParentCid: 0af4
DirBase: 7e2712e0 ObjectTable: c288ba00 HandleCount: 9.
Image: secobj.exe
Handle table at c288ba00 with 9 entries in use
0024: Object: c238e9c8 GrantedAccess: 000f0007 Entry: c37b7048
Object: c238e9c8 Type: (84ec6040) Section
ObjectHeader: c238e9b0 (new version)
HandleCount: 1 PointerCount: 2
Directory Object: 98a0f170 Name: MyMap
倾销SectionObject
kd> dt nt!_SECTION_OBJECT c238e9c8
+0x000 StartingVa : 0xc227e2c8 Void
+0x004 EndingVa : 0x00d3db6c Void
+0x008 Parent : 0xb0d3db20 Void
+0x00c LeftChild : (null)
+0x010 RightChild : 0x00000003 Void
+0x014 Segment : 0xc36aba20 _SEGMENT_OBJECT
KD> $$注意，最后段成员它不是SEGMENT_OBJECT但
NT！_segment或实际指针的ControlArea此节
kd> dt nt!_SEGMENT 0xc36aba20
+0x000 ControlArea : 0x85182d08 _CONTROL_AREA
+0x004 TotalNumberOfPtes : 1
+0x008 SegmentFlags : _SEGMENT_FLAGS
+0x00c NumberOfCommittedPages : 1
+0x010 SizeOfSegment : 0x1000
+0x018 ExtendInfo : (null)
+0x018 BasedAddress : (null)
+0x01c SegmentLock : _EX_PUSH_LOCK
+0x020 u1 : <unnamed-tag>
+0x024 u2 : <unnamed-tag>
+0x028 PrototypePte : 0xc36aba50 _MMPTE
+0x030 ThePtes : [1] _MMPTE
KD> $$可以扩大工会U2和转储工会FirstMappedVa看看这部分的内容
kd> dt nt!_SEGMENT u2.FirstMappedVa 0xc36aba20
+0x024 u2 :
+0x000 FirstMappedVa : 0x000e0000 Void
倾倒内容
kd> da 0xe0000
000e0000 "Message from blabb to lieven fro"
000e0020 "m Stack Overflow."
kd>
或做！CA获得它指向第一页FirstMappedVa
如果内容是大于一个页面边界获取他们是
有点乏味，因为它们可能已经被调出，将需要执行 操作，因而，页面错误处理，让他们眼帘
kd> !ca poi(0xc36aba20)
ControlArea @ 85182d08
Segment c36aba20 Flink 00000000 Blink 00000000
Section Ref 1 Pfn Ref 0 Mapped Views 1
User Ref 2 WaitForDel 0 Flush Count 0
File Object 00000000 ModWriteCount 0 System Views 0
WritableRefs 0
Flags (2000) Commit
Pagefile-backed section
Segment @ c36aba20
ControlArea 85182d08 ExtendInfo 00000000
Total Ptes 1
Segment Size 1000 Committed 1
CreatingProcess 8605ab28 FirstMappedVa e0000 <-------------
ProtoPtes c36aba50
Flags (80000) ProtectionMask
Subsection 1 @ 85182d58
ControlArea 85182d08 Starting Sector 0 Number Of Sectors 0
Base Pte c36aba50 Ptes In Subsect 1 Unused Ptes 0
Flags 8 Sector Offset 0 Protection 4
kd>
答
添加另一种答案显示另一个页面文件支持的部分内容 ，你可能需要去创建过程，并在其虚拟地址看的过程，是当前的，而不是
你可能知道的外壳保持一定global counters在共享部分
0104: Object: c2255450 GrantedAccess: 00000006 Entry: c5d9b208
Object: c2255450 Type: (84ec6040) Section
ObjectHeader: c2255438 (new version)
HandleCount: 6 PointerCount: 7
Directory Object: 9d662520 Name: windows_shell_global_counters
代码来检索他们
#include <stdio.h>
#include <windows.h>
#include <stdlib.h>
#include <shlwapi.h>
#pragma comment(lib,"shlwapi.lib")
//add all items in the ... place holder in arrays below
PCHAR enuname[] = { "GLOBALCOUNTER_SEARCHMANAGER",...};
int foo [] = { GLOBALCOUNTER_SEARCHMANAGER,...};
void main (void) {
long cval = NULL;
for(int i =0; i < _countof(foo) ;i++) {
cval = SHGlobalCounterGetValue((SHGLOBALCOUNTER)foo[i]);
printf ("%65s = %0x\n" ,enuname[i], cval);
}
}
编译和执行这一点，你可能会得到这样的结果（记住计数器是挥发性的，所以你可能需要快速够比较）
C:\secobj\shglob>shglob.exe | head -n 13
GLOBALCOUNTER_SEARCHMANAGER = 0
GLOBALCOUNTER_SEARCHOPTIONS = 0
GLOBALCOUNTER_FOLDERSETTINGSCHANGE = 0
GLOBALCOUNTER_RATINGS = 0
GLOBALCOUNTER_APPROVEDSITES = 0
GLOBALCOUNTER_RESTRICTIONS = 5
GLOBALCOUNTER_SHELLSETTINGSCHANGED = 2
GLOBALCOUNTER_SYSTEMPIDLCHANGE = 0
GLOBALCOUNTER_OVERLAYMANAGER = 0
GLOBALCOUNTER_QUERYASSOCIATIONS = 0
GLOBALCOUNTER_IESESSIONS = 0
GLOBALCOUNTER_IEONLY_SESSIONS = 0
GLOBALCOUNTER_APPLICATION_DESTINATIONS = 83
看当前进程
kd> ? @$proc
Evaluate expression: -2033240552 = 86cf3618
kd> ?? (char *)@$proc->ImageFileName
char * 0x86cf3784
"cdb.exe"
kd> !handle 0 3 @$proc Section
0164: Object: c2255450 GrantedAccess: 00000006 Entry: c3df32c8
Object: c2255450 Type: (84ec6040) Section
ObjectHeader: c2255438 (new version)
HandleCount: 11 PointerCount: 12
Directory Object: 9d662520 Name: windows_shell_global_counters
kd> dc @@c++(((nt!_segment *)((nt!_section_object *) 0xc2255450)->Segment)->u2.FirstMappedVa)
00290000 ???????? ???????? ???????? ???????? ????????????????
00290010 ???????? ???????? ???????? ???????? ????????????????
00290020 ???????? ???????? ???????? ???????? ????????????????
00290030 ???????? ???????? ???????? ???????? ????????????????
00290040 ???????? ???????? ???????? ???????? ????????????????
00290050 ???????? ???????? ???????? ???????? ????????????????
00290060 ???????? ???????? ???????? ???????? ????????????????
00290070 ???????? ???????? ???????? ???????? ????????????????
它可能是这个当前进程获得一个手柄OpenFileMapping但还没有将其映射或页面调出（livekd不能使用页面调）无论我们似乎无法查看这部分内容
让我们看看谁创造了这个共享部分
kd> ? @@c++(((nt!_segment *)((nt!_section_object *) 0xc2255450)->Segment)->u1.CreatingProcess)
Evaluate expression: -2050635184 = 85c5ca50
kd> !process 85c5ca50 0
PROCESS 85c5ca50 SessionId: 1 Cid: 0af4 Peb: 7ffd9000 ParentCid: 0704
DirBase: 7e271420 ObjectTable: c5d873c8 HandleCount: 888.
Image: explorer.exe
它看起来合乎逻辑的explorer.exe似乎从创建进程的虚拟地址倾销0n13双字创造了这个共享部分
让检查
kd> .process /p /r 85c5ca50
kd> dc @@c++(((nt!_segment *)((nt!_section_object *) 0xc2255450)->Segment)->u2.FirstMappedVa) l0n13
00290000 00000000 00000000 00000000 00000000 ................
00290010 00000000 00000005 00000002 00000000 ................
00290020 00000000 00000000 00000000 00000000 ................
00290030 00000083 ....
收到消息;）。在阅读“几种类型的章节”之后，它已经得到了提升，并且应该有可能不止一次地投票赞成......这对我来说是黄金！ –
我很高兴知道答案是有帮助的 – blabb