CHAPTER 86. ORACLE RDBMS: .SYM-FILES CHAPTER 86. ORACLE RDBMS: .SYM-FILES
0000460 0000005a 00000064 0000006e 0000007a
0000500 00000088 00000096 000000a4 000000ae
0000520 000000b6 000000c0 000000d2 000000e2
0000540 000000f0 00000107 00000110 00000116
0000560 00000121 0000012a 00000132 0000013a
0000600 00000146 00000153 00000170 00000186
0000620 000001a9 000001c1 000001de 000001ed
0000640 000001fb 00000207 0000021b 0000022a
0000660 0000023d 0000024e 00000269 00000277
0000700 00000287 00000297 000002b6 000002ca
0000720 000002dc 000002f0 00000304 00000321
0000740 0000033e 0000035d 0000037a 00000395
0000760 000003ae 000003b6 000003be 000003c6
0001000 000003ce 000003dc 000003e9 000003f8
0001020
There are 132 values, that’s 66*2. Probably, there are two 32-bit values for each symbol, but maybe there are two arrays?
Let’s see.
Values starting with0x1000may be addresses. This is a .SYM file for a DLL after all, and the default base address of win32
DLLs is0x10000000, and the code usually starts at0x10001000.
When we open the orawtc8.dll file inIDA, the base address is different, but nevertheless, the first function is:
.text:60351000 sub_60351000 proc near
.text:60351000
.text:60351000 arg_0 = dword ptr 8
.text:60351000 arg_4 = dword ptr 0Ch
.text:60351000 arg_8 = dword ptr 10h
.text:60351000
.text:60351000 push ebp
.text:60351001 mov ebp, esp
.text:60351003 mov eax, dword_60353014
.text:60351008 cmp eax, 0FFFFFFFFh
.text:6035100B jnz short loc_6035104F
.text:6035100D mov ecx, hModule
.text:60351013 xor eax, eax
.text:60351015 cmp ecx, 0FFFFFFFFh
.text:60351018 mov dword_60353014, eax
.text:6035101D jnz short loc_60351031
.text:6035101F call sub_603510F0
.text:60351024 mov ecx, eax
.text:60351026 mov eax, dword_60353014
.text:6035102B mov hModule, ecx
.text:60351031
.text:60351031 loc_60351031: ; CODE XREF: sub_60351000+1D
.text:60351031 test ecx, ecx
.text:60351033 jbe short loc_6035104F
.text:60351035 push offset ProcName ; "ax_reg"
.text:6035103A push ecx ; hModule
.text:6035103B call ds:GetProcAddress
...
Wow, “ax_reg” string sounds familiar. It’s indeed the first string in the strings block! So the name of this function seems to
be “ax_reg”.
The second function is:
.text:60351080 sub_60351080 proc near
.text:60351080
.text:60351080 arg_0 = dword ptr 8
.text:60351080 arg_4 = dword ptr 0Ch
.text:60351080
.text:60351080 push ebp
.text:60351081 mov ebp, esp
.text:60351083 mov eax, dword_60353018
.text:60351088 cmp eax, 0FFFFFFFFh
.text:6035108B jnz short loc_603510CF
.text:6035108D mov ecx, hModule
.text:60351093 xor eax, eax
.text:60351095 cmp ecx, 0FFFFFFFFh