1 通过kifastcallentry或者常规的SSDT 挂钩实现的弹窗
2 文件过滤驱动引起弹窗
!process 0 0 //列出所有进程
.reload
!process fffffa800a04b3a0 f //列出指定进程的所有的栈回溯
!irp //如果是因为释放敏感文件被弹窗使用这条命令观察IRP
!fileobj //解析IRP里面的文件名
3 敏感注册表写入引起注册表回调的弹窗
如果我们不清楚是因为我们释放了敏感文件还是写了敏感注册表
列出进程的所有handle 看handle count 如果count 很小 就证明一出来就被抓了
!handle 0 7 86a94270 (这里是敏感进程的EPROCESS)
这篇文章主要分析的是使用test_reg写了敏感注册表引起了杀软弹窗
!process 0 0
PROCESS fffffa800a04b3a0
SessionId: 1 Cid: 0d0c Peb: 7efdf000 ParentCid: 0960
DirBase: 24000000 ObjectTable: fffff8a00189fbf0 HandleCount: 254.
Image: LiveUpdate360.exe
.reload
!process fffffa800a04b3a0 f
列出所有的栈回溯 我们可以看到很多线程 证明这个弹窗不是由于进程回调引起的 如果是进程回调弹窗的话 创建第一个线程的时候就弹窗了。
首先贴一下完整的栈
1 THREAD fffffa800a09e060 Cid 0ec0.0d70 Teb: 000000007ef97000 Win32Thread: fffff900c06b4260 WAIT: (DelayExecution) KernelMode Non-Alertable 2 fffff88003b0f200 SynchronizationEvent 3 Not impersonating 4 DeviceMap fffff8a0010c4980 5 Owning Process fffffa8009c10b30 Image: test_reg.exe 6 Attached Process N/A Image: N/A 7 Wait Start TickCount 475720 Ticks: 655 (0:00:00:10.218) 8 Context Switch Count 217 IdealProcessor: 0 LargeStack 9 UserTime 00:00:00.000 10 KernelTime 00:00:00.015 11 Win32 Start Address 0x00000000004051a7 12 Stack Init fffff88003b0fc70 Current fffff88003b0ef20 13 Base fffff88003b10000 Limit fffff88003b08000 Call 0 14 Priority 11 BasePriority 8 UnusualBoost 0 ForegroundBoost 2 IoPriority 2 PagePriority 5 15 Child-SP RetAddr Call Site 16 fffff880`03b0ef60 fffff800`03e8f992 nt!KiSwapContext+0x7a 17 fffff880`03b0f0a0 fffff800`03e921af nt!KiCommitThreadWait+0x1d2 18 fffff880`03b0f130 fffff880`040239d9 nt!KeWaitForSingleObject+0x19f 19 fffff880`03b0f1d0 fffff880`04024c9b 360FsFlt+0x1f9d9 20 fffff880`03b0f250 fffff880`04026adb 360FsFlt+0x20c9b 21 fffff880`03b0f2f0 fffff800`04230100 360FsFlt+0x22adb 22 fffff880`03b0f320 fffff800`040ea16d nt!CmpCallCallBacks+0x1c0 23 fffff880`03b0f3f0 fffff800`04184d38 nt! ?? ::NNGAKEGL::`string‘+0x2d3bd 24 fffff880`03b0f6f0 fffff800`04185f56 nt!ObpLookupObjectName+0x588 25 fffff880`03b0f7e0 fffff800`0413d8f8 nt!ObOpenObjectByName+0x306 26 fffff880`03b0f8b0 fffff800`0413e19e nt!CmCreateKey+0x2e1 27 fffff880`03b0fa20 fffff800`03e898d3 nt!NtCreateKey+0x2e 28 fffff880`03b0fa70 00000000`76e314ea nt!KiSystemServiceCopyEnd+0x13 (TrapFrame @ fffff880`03b0fae0) 29 00000000`0448e698 00000000`00000000 0x76e314ea 30 31 如果从CmCreateKey中 把 _Object_Attributes 拿出来 涉及到栈操作的只有这么多 32 33 PAGE:FFFFF80004180614 48 8B C4 mov rax, rsp 34 PAGE:FFFFF80004180617 4C 89 40 18 mov [rax+18h], r8 35 PAGE:FFFFF8000418061B 48 89 48 08 mov [rax+8], rcx 36 PAGE:FFFFF8000418061F 53 push rbx 37 PAGE:FFFFF80004180620 56 push rsi 38 PAGE:FFFFF80004180621 57 push rdi 39 PAGE:FFFFF80004180622 41 54 push r12 40 PAGE:FFFFF80004180624 41 55 push r13 41 PAGE:FFFFF80004180626 41 56 push r14 42 PAGE:FFFFF80004180628 41 57 push r15 43 PAGE:FFFFF8000418062A 48 81 EC 30 01 00 00 sub rsp, 130h 44 PAGE:FFFFF80004180631 4D 8B E8 mov r13, r8 45 46 参数传递是这样的 多于四个参数 47 48 49 ZwCreateKey( 50 OUT PHANDLE KeyHandle, 51 IN ACCESS_MASK DesiredAccess, 52 IN POBJECT_ATTRIBUTES ObjectAttributes, 53 IN ULONG TitleIndex, 54 IN PUNICODE_STRING Class OPTIONAL, 55 IN ULONG CreateOptions, 56 OUT PULONG Disposition OPTIONAL 57 ); 58 59 60 堆栈 Disposition 61 堆栈 CreateOptions 62 堆栈 Class 63 r9 TitleIndex 64 r8 ObjectAttributes 65 rdx DesiredAccess 66 rcx KeyHandle 67 68 fffff880`03b0f8b0 fffff800`0413e19e nt!CmCreateKey+0x2e1 69 fffff880`03b0fa20 fffff800`03e898d3 nt!NtCreateKey+0x2e 70 fffff880`03b0fa70 00000000`76e314ea nt!KiSystemServiceCopyEnd+0x13 (TrapFrame @ fffff880`03b0fae0) 71 72 73 一下子就可以看到写哪个注册表被弹窗了 74 dt _Object_Attributes poi(fffff880`03b0f8b0+130+7*8+18) 75 76 这块或者这么算 fffff880`03b0fa20-8+18
总结:
难点1:windbg命令的掌握
难点2:X64下面的参数传递有四个参数是通过寄存器传递的，如何从汇编代码中把我们需要的参数找出来。
这里我们需要从_Object_Attributes 里面找出我们写的敏感的注册表键值，是哪个键值引起了杀软弹窗