PlaneJun'Blog

我是从未来来的！现在学已经来不及了，放开玩吧！

发表于 更新于 分类于

1、EPROCESS

进程结构，每个进程都有这样一个结构。EPROCESS中还有一个KPROCESS，其中EPROCESS被称为执行体,主要是给R3进行访问；KPROCESS才是真正的对象结构。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
//0x2c0 bytes (sizeof)
struct _EPROCESS
{
    struct _KPROCESS Pcb;                                                   //0x0
    struct _EX_PUSH_LOCK ProcessLock;                                       //0x98
    union _LARGE_INTEGER CreateTime;                                        //0xa0
    union _LARGE_INTEGER ExitTime;                                          //0xa8
    struct _EX_RUNDOWN_REF RundownProtect;                                  //0xb0
    VOID* UniqueProcessId;                                                  //0xb4
    struct _LIST_ENTRY ActiveProcessLinks;                                  //0xb8
    ULONG ProcessQuotaUsage[2];                                             //0xc0
    ULONG ProcessQuotaPeak[2];                                              //0xc8
    volatile ULONG CommitCharge;                                            //0xd0
    struct _EPROCESS_QUOTA_BLOCK* QuotaBlock;                               //0xd4
    struct _PS_CPU_QUOTA_BLOCK* CpuQuotaBlock;                              //0xd8
    ULONG PeakVirtualSize;                                                  //0xdc
    ULONG VirtualSize;                                                      //0xe0
    struct _LIST_ENTRY SessionProcessLinks;                                 //0xe4
    VOID* DebugPort;                                                        //0xec
    union
    {
        VOID* ExceptionPortData;                                            //0xf0
        ULONG ExceptionPortValue;                                           //0xf0
        ULONG ExceptionPortState:3;                                         //0xf0
    };
    struct _HANDLE_TABLE* ObjectTable;                                      //0xf4
    struct _EX_FAST_REF Token;                                              //0xf8
    ULONG WorkingSetPage;                                                   //0xfc
    struct _EX_PUSH_LOCK AddressCreationLock;                               //0x100
    struct _ETHREAD* RotateInProgress;                                      //0x104
    struct _ETHREAD* ForkInProgress;                                        //0x108
    ULONG HardwareTrigger;                                                  //0x10c
    struct _MM_AVL_TABLE* PhysicalVadRoot;                                  //0x110
    VOID* CloneRoot;                                                        //0x114
    volatile ULONG NumberOfPrivatePages;                                    //0x118
    volatile ULONG NumberOfLockedPages;                                     //0x11c
    VOID* Win32Process;                                                     //0x120
    struct _EJOB* volatile Job;                                             //0x124
    VOID* SectionObject;                                                    //0x128
    VOID* SectionBaseAddress;                                               //0x12c
    ULONG Cookie;                                                           //0x130
    ULONG Spare8;                                                           //0x134
    struct _PAGEFAULT_HISTORY* WorkingSetWatch;                             //0x138
    VOID* Win32WindowStation;                                               //0x13c
    VOID* InheritedFromUniqueProcessId;                                     //0x140
    VOID* LdtInformation;                                                   //0x144
    VOID* VdmObjects;                                                       //0x148
    ULONG ConsoleHostProcess;                                               //0x14c
    VOID* DeviceMap;                                                        //0x150
    VOID* EtwDataSource;                                                    //0x154
    VOID* FreeTebHint;                                                      //0x158
    union
    {
        struct _HARDWARE_PTE PageDirectoryPte;                              //0x160
        ULONGLONG Filler;                                                   //0x160
    };
    VOID* Session;                                                          //0x168
    UCHAR ImageFileName[15];                                                //0x16c
    UCHAR PriorityClass;                                                    //0x17b
    struct _LIST_ENTRY JobLinks;                                            //0x17c
    VOID* LockedPagesList;                                                  //0x184
    struct _LIST_ENTRY ThreadListHead;                                      //0x188
    VOID* SecurityPort;                                                     //0x190
    VOID* PaeTop;                                                           //0x194
    volatile ULONG ActiveThreads;                                           //0x198
    ULONG ImagePathHash;                                                    //0x19c
    ULONG DefaultHardErrorProcessing;                                       //0x1a0
    LONG LastThreadExitStatus;                                              //0x1a4
    struct _PEB* Peb;                                                       //0x1a8
    struct _EX_FAST_REF PrefetchTrace;                                      //0x1ac
    union _LARGE_INTEGER ReadOperationCount;                                //0x1b0
    union _LARGE_INTEGER WriteOperationCount;                               //0x1b8
    union _LARGE_INTEGER OtherOperationCount;                               //0x1c0
    union _LARGE_INTEGER ReadTransferCount;                                 //0x1c8
    union _LARGE_INTEGER WriteTransferCount;                                //0x1d0
    union _LARGE_INTEGER OtherTransferCount;                                //0x1d8
    ULONG CommitChargeLimit;                                                //0x1e0
    volatile ULONG CommitChargePeak;                                        //0x1e4
    VOID* AweInfo;                                                          //0x1e8
    struct _SE_AUDIT_PROCESS_CREATION_INFO SeAuditProcessCreationInfo;      //0x1ec
    struct _MMSUPPORT Vm;                                                   //0x1f0
    struct _LIST_ENTRY MmProcessLinks;                                      //0x25c
    VOID* HighestUserAddress;                                               //0x264
    ULONG ModifiedPageCount;                                                //0x268
    union
    {
        ULONG Flags2;                                                       //0x26c
        struct
        {
            ULONG JobNotReallyActive:1;                                     //0x26c
            ULONG AccountingFolded:1;                                       //0x26c
            ULONG NewProcessReported:1;                                     //0x26c
            ULONG ExitProcessReported:1;                                    //0x26c
            ULONG ReportCommitChanges:1;                                    //0x26c
            ULONG LastReportMemory:1;                                       //0x26c
            ULONG ReportPhysicalPageChanges:1;                              //0x26c
            ULONG HandleTableRundown:1;                                     //0x26c
            ULONG NeedsHandleRundown:1;                                     //0x26c
            ULONG RefTraceEnabled:1;                                        //0x26c
            ULONG NumaAware:1;                                              //0x26c
            ULONG ProtectedProcess:1;                                       //0x26c
            ULONG DefaultPagePriority:3;                                    //0x26c
            ULONG PrimaryTokenFrozen:1;                                     //0x26c
            ULONG ProcessVerifierTarget:1;                                  //0x26c
            ULONG StackRandomizationDisabled:1;                             //0x26c
            ULONG AffinityPermanent:1;                                      //0x26c
            ULONG AffinityUpdateEnable:1;                                   //0x26c
            ULONG PropagateNode:1;                                          //0x26c
            ULONG ExplicitAffinity:1;                                       //0x26c
        };
    };
    union
    {
        ULONG Flags;                                                        //0x270
        struct
        {
            ULONG CreateReported:1;                                         //0x270
            ULONG NoDebugInherit:1;                                         //0x270
            ULONG ProcessExiting:1;                                         //0x270
            ULONG ProcessDelete:1;                                          //0x270
            ULONG Wow64SplitPages:1;                                        //0x270
            ULONG VmDeleted:1;                                              //0x270
            ULONG OutswapEnabled:1;                                         //0x270
            ULONG Outswapped:1;                                             //0x270
            ULONG ForkFailed:1;                                             //0x270
            ULONG Wow64VaSpace4Gb:1;                                        //0x270
            ULONG AddressSpaceInitialized:2;                                //0x270
            ULONG SetTimerResolution:1;                                     //0x270
            ULONG BreakOnTermination:1;                                     //0x270
            ULONG DeprioritizeViews:1;                                      //0x270
            ULONG WriteWatch:1;                                             //0x270
            ULONG ProcessInSession:1;                                       //0x270
            ULONG OverrideAddressSpace:1;                                   //0x270
            ULONG HasAddressSpace:1;                                        //0x270
            ULONG LaunchPrefetched:1;                                       //0x270
            ULONG InjectInpageErrors:1;                                     //0x270
            ULONG VmTopDown:1;                                              //0x270
            ULONG ImageNotifyDone:1;                                        //0x270
            ULONG PdeUpdateNeeded:1;                                        //0x270
            ULONG VdmAllowed:1;                                             //0x270
            ULONG CrossSessionCreate:1;                                     //0x270
            ULONG ProcessInserted:1;                                        //0x270
            ULONG DefaultIoPriority:3;                                      //0x270
            ULONG ProcessSelfDelete:1;                                      //0x270
            ULONG SetTimerResolutionLink:1;                                 //0x270
        };
    };
    LONG ExitStatus;                                                        //0x274
    struct _MM_AVL_TABLE VadRoot;                                           //0x278
    struct _ALPC_PROCESS_CONTEXT AlpcContext;                               //0x298
    struct _LIST_ENTRY TimerResolutionLink;                                 //0x2a8
    ULONG RequestedTimerResolution;                                         //0x2b0
    ULONG ActiveThreadsHighWatermark;                                       //0x2b4
    ULONG SmallestTimerResolution;                                          //0x2b8
    struct _PO_DIAG_STACK_RECORD* TimerResolutionStackRecord;               //0x2bc
};

  • Pcb：Kprocess结构体。内核成员，见下文。

  • ProcessLock：R3进程锁。修改EPROCESS结构存放锁结构，防止同时修改。改完了置0.

  • CreateTime：进程的创建时间。

  • ExitTime：进程的退出时间。

  • RundownProtect：进程锁。该字段置值后，进程无法被访问、打开、结束，相当于保护。但是会容易卡死。

image-20230613124753624

阅读全文 »

发表于 更新于 分类于

1、R3进入R0

WindowsXp前R3进入R0都是依靠中断门(0x2E)进行提权，这种提权方式较为复杂，需要压入SS、CS、EIP、ESP等等一系列复杂操作。因此Xp后引入快速调用(FastCall)。

image-20230606174405820

image-20230606174544302

x86使用的是sysenter/sysreturn,x64是syscall/sysexit。

阅读全文 »

发表于 更新于 分类于

x64页表映射

微软设计了一种页表自映射的方式，提高了cpu工作的效率。正常情况下一个线性地址需要进行4次拆分.

image-20230525191034126

而在表映射的作用下，可实现3次拆分即可。

原理

阅读全文 »

发表于 更新于 分类于

一、没有大炮我们自己造

首先编写一个简单的程序。

1
2
3
4
5
6
7
int main()
{
	int a = 1;
	a = a + 1;
	printf("%d\n",a);
	return 0;
}

编译后给程序添加vmp保护壳，这里选择的VMP版本为v3.5.0。

image-20230105160101521

阅读全文 »

发表于 更新于 分类于

1、保护模式简介

CPU分有：实模式、保护模式、虚拟8086模式，大多数操作系统都运行在保护模式下。

保护模式主要是用来保护寄存器、数据结构、指令，实际上也就是保护寄存器，因为cpu的数据都存放在寄存器中。

保护模式的特点：段和页。

  • 实模式：16位系统DOS，访问的都是物理地址，不安全。
  • 保护模式：将物理地址隔阂后，使用一种线性的虚拟地址来访问，相对实模式来说比较安全。并用段和页的特点来维护虚拟地址。
阅读全文 »
0%