Easy CrackMe #1

[BunnyLab 0]

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Easy CrackMe #1

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Only simple algorithms - for one name one key.

Provide a valid pair of name and serial, or write a keygen.

Good luck.

 

• Submitter
  BunnyLab
• Submitted
  12/09/2020
• Category
  KeygenMe

 

[Salin 0]

Name:leet

Serial:77fe1a9ac6d0e41b35c---

simple string hash + xor some stuff

need constants to meet constraint of word count.

keygen:

Spoiler

	char buff[0x20], d[0x20];
	memset(buff, 0x0, 0x20);
	cin >> buff;
	
	//simple hash
	char* c = buff;
	int r = 0;
	while (*c)
	{
		r += *c;
		c++;
	}
	//xor
	r ^= 0x7654;
	sprintf(buff, "%x", r);

	int i = 3;
	do {
		r = r << 2 | r >> 30;
		r ^= 0x7654;
		sprintf(d, "%x", r);
		strncat(buff, d, 5);
		i--;
	} while (i);

	buff[19] = 45;
	buff[20] = 45;
	buff[21] = 45;
	buff[22] = '\0';

	cout << buff;

 

 

 

 

 

 

 

Edited December 12, 2020 by Salin
hide keygen code (see edit history)

[BunnyLab 0]

9 hours ago, Salin said:

Name:leet

Serial:77fe1a9ac6d0e41b35c---

simple string hash + xor some stuff

Right.

simple string hash + xor + rol + xor + rol + xor + rol + xor 

Good job.

This krackme for beginners.

I'll make it harder - later

Edited December 11, 2020 by BunnyLab (see edit history)

[GioTiN 0]

here is my keygen

 

keygen.exe