文件是txt，里面是汇编

; void __cdecl enc(char *p)
.text:00401160 _enc proc near ; CODE XREF: _main+1B↑p
.text:00401160
.text:00401160 i = dword ptr -4
.text:00401160 Str = dword ptr 8
.text:00401160
.text:00401160 push ebp
.text:00401161 mov ebp, esp
.text:00401163 push ecx
.text:00401164 mov [ebp+i], 0
.text:0040116B jmp short loc_401176
.text:0040116D ; —————————————————————————
.text:0040116D
.text:0040116D loc_40116D: ; CODE XREF: _enc+3B↓j
.text:0040116D mov eax, [ebp+i]
.text:00401170 add eax, 1
.text:00401173 mov [ebp+i], eax
.text:00401176
.text:00401176 loc_401176: ; CODE XREF: _enc+B↑j
.text:00401176 mov ecx, [ebp+Str]
.text:00401179 push ecx ; Str
.text:0040117A call _strlen
.text:0040117F add esp, 4
.text:00401182 cmp [ebp+i], eax
.text:00401185 jge short loc_40119D
.text:00401187 mov edx, [ebp+Str]
.text:0040118A add edx, [ebp+i]
.text:0040118D movsx eax, byte ptr [edx]
.text:00401190 xor eax, 33h
.text:00401193 mov ecx, [ebp+Str]
.text:00401196 add ecx, [ebp+i]
.text:00401199 mov [ecx], al
.text:0040119B jmp short loc_40116D
.text:0040119D ; —————————————————————————
.text:0040119D
.text:0040119D loc_40119D: ; CODE XREF: _enc+25↑j
.text:0040119D mov esp, ebp
.text:0040119F pop ebp
.text:004011A0 retn
.text:004011A0 _enc endp
Input: your flag
Encrypted result: 0x5b,0x54,0x52,0x5e,0x56,0x48,0x44,0x56,0x5f,0x50,0x3,0x5e,0x56,0x6c,0x47,0x3,0x6c,0x41,0x56,0x6c,0x44,0x5c,0x41,0x2,0x57,0x12,0x4e

前面是一个验证字符串长度，后面是把每个字符与 0x33 进行异或加密，把结果与0x33异或即可

hgame{welc0me_t0_re_wor1d!}