Module: Msf::Payload::Windows::Exitfunk_x64

Included in:
BindNamedPipe_x64, BindTcp_x64, ReverseHttp_x64, ReverseNamedPipe_x64, ReverseTcp_x64
Defined in:
lib/msf/core/payload/windows/x64/exitfunk_x64.rb

Overview

Implements arbitrary exit routines for Windows ARCH_X64 payloads

Instance Method Summary collapse

Instance Method Details

#asm_exitfunk(opts = {}) ⇒ Object



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
# File 'lib/msf/core/payload/windows/x64/exitfunk_x64.rb', line 13

def asm_exitfunk(opts={})

  asm = %Q^
    exitfunk:
      pop rax               ; won't be returning, realign the stack with a pop
  ^

  case opts[:exitfunk]

  when 'seh'
    asm << %Q^
      push 0                ;
      pop rcx               ; set the exit function parameter
      mov ebx, 0x#{Msf::Payload::Windows.exit_types['seh'].to_s(16)}
      mov r10d, ebx         ; place the correct EXITFUNK into r10d
      call rbp              ; SetUnhandledExceptionFilter(0)
      push 0                ;
      ret                   ; Return to NULL (crash)
    ^

  when 'thread'
    asm << %Q^
      push 0                ;
      pop rcx               ; set the exit function parameter
      mov ebx, 0x#{Msf::Payload::Windows.exit_types['thread'].to_s(16)}
      mov r10d, ebx         ; place the correct EXITFUNK into r10d
      call rbp              ; call EXITFUNK( 0 );
    ^

  when 'process', nil
    asm << %Q^
      push 0                ;
      pop rcx               ; set the exit function parameter
      mov r10, #{Rex::Text.block_api_hash('kernel32.dll', 'ExitProcess')}
      call rbp              ; ExitProcess(0)
    ^

  when 'sleep'
    asm << %Q^
      push 300000           ; 300 seconds
      pop rcx               ; set the sleep function parameter
      mov r10, #{Rex::Text.block_api_hash('kernel32.dll', 'Sleep')}
      call rbp              ; Sleep(30000)
      jmp exitfunk          ; repeat
    ^

  else
    # Do nothing and continue after the end of the shellcode
  end

  asm
end