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Checksum calculator (from NeutrinoBot Loader)
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#include <stdio.h> | |
#include <string.h> | |
#ifdef _MSC_VER | |
#include <stdint.h> | |
#else | |
#include <inttypes.h> | |
#endif | |
#ifndef DWORD | |
typedef uint32_t DWORD; | |
#endif | |
inline DWORD rotl32a(DWORD x, DWORD n) | |
{ | |
return (x<<n) | (x>>(32-n)); | |
} | |
inline char to_lower(char c) | |
{ | |
if (c >= 'A' && c <= 'Z') { | |
c = c - 'A' + 'a'; | |
} | |
return c; | |
} | |
DWORD calc_checksum(char *str, bool lowercase = true) | |
{ | |
if (str == NULL) return 0; | |
DWORD checksum = 0; | |
size_t len = strlen(str); | |
for (int i = 0; i < len; i++) { | |
checksum = rotl32a(checksum, 7); | |
char c = str[i]; | |
if (lowercase) c = to_lower(c); | |
checksum ^= c; | |
} | |
return checksum; | |
} | |
int main(int argc, char *argv[]) | |
{ | |
char test_str[] = "kernel32.dll"; | |
char *str = NULL; | |
if (argc < 2) { | |
str = test_str; | |
} else { | |
str = argv[1]; | |
} | |
printf("%s\n", str); | |
printf("%X\n", calc_checksum(str)); | |
return 0; | |
} |
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0x642742FF ; VBoxMiniRdrDN | |
0x283CC630 ; VBoxGuest | |
0x911E353 | |
0xEDB71E9 |
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0x1C669D6A | |
0xC2F56A18 | |
0xC106E17B | |
0x5608BCC4 | |
0x6512F9D0 | |
0xC604D52A ; snxhk.dll | |
0x4D0651A5 | |
0xAC12B9FB ; sbiedll.dll | |
0x5B747561 | |
0x53309C85 | |
0xE53ED522 |
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0x6169078A | |
0x47000343 | |
0xC608982D | |
0x46EE4F10 | |
0xF6EC4B30 | |
0xB1CBC652 ; vboxservice.exe | |
0x6D3E6FDD ; vboxtray.exe | |
0x583EB7E8 | |
0xC03EAA65 |
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0xFE9EA0D5 | |
0x6689BB92 | |
0x3C5FF312 ; procexpl | |
0x9B5A88D9 ; procmon_window_class | |
0x4B4576B5 | |
0xAED304FC | |
0x225FD98F | |
0x6D3FA1CA | |
0xCF388E01 | |
0xD486D951 | |
0x39177889 |
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