Difficulty : I guess 3 is enough. 
Language : Delphi
Platform : Windows x32/x64
OS Version : XP and above
Packer / Protector : None.

Description :

Goals:
1. Write a valid keygen for the target.

Good luck!

 

Screenshot :

 

Go Figure!!! Fixed.zip

Edited January 26, 20169 yr by XorRanger
Fixed a Typo Bug that made it Impossible to get a valid key without Patching.

currently stuck at knowing whats going on with the file, so far have gotten:

this: #925')43% which results in: estiguryc

Let's see how it goes

9 hours ago, 0xNOP said:

currently stuck at knowing whats going on with the file, so far have gotten:

this: #925')43% which results in: estiguryc

Let's see how it goes

Keep trying

Updated the challenge to fix a bug.

Should I release a valid Key Combination?

Edited January 26, 20169 yr by XorRanger

14 hours ago, XorRanger said:

Updated the challenge to fix a bug.

Should I release a valid Key Combination?

I guess that would help by a lot but I see this as a challenge I don't want you to spoil me or anyone else who is trying to solve it

I'm working on some projects, when I get some free time will get back to this Keygenme

Edited January 27, 20169 yr by 0xNOP

To solve this is pretty simple,put .exe in a folder and make a file named duh!!.syk the key is already inside,also when you save make sure "ENCODING" is set to ANSI.

Tutorial (Short version):

The kgm does the following:

1) Looks for the file "duh!!.syk" in the same directory (folder), if not found, it loads showing one field only (badboy), else:

2) Reads the text line inside the file "duh!!.syk" & by using a simple (xor 0x40) with each character, result should read "TestingOurSync???", else (badboy)

3) Loads the full form showing both text fields (i.e: name & serial) & a check button. Now try:

name: Chilling

serial: o!h.$kLB[2E{(,YV;+X/]thj}H.(uCFT~1Wx2iWM;4T*)Y$S"1B.$wcS@J

Click the check button & the kgm will:

4) Trims both strings, Base91 decodes the serial into:

"26734308-=`~<-YAGAIV-2090603021-2C51325133CEA38"

Checks to see if it has 5 parts (separated by "-"), else (badboy). More checks follow.

5) part1 must be 8 characters from "0123456789"

6) part2 must be 4 characters from "$+<=>|~"

7) part3 must be 6 characters from "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

8) Build & check part4:

a) Uppercase the constant "If I Only Knew" & add a null byte at start then SDBM Hash (Ozan Yigit) it (in reverse order):

0x57454E4B20594C4E4F204920464900 = 0x7D0BFCAF

b) math: 0x7D0BFCAF xor 0x46 (a constant) = 0x7D0BFCE9

c) math: 0x7D0BFCE9 xor StrToInt(p1) 0x0197EEE4 = 0x7C9C120D

d) IntToStr(0x7C9C120D) = "2090603021" <> p4 = "2090603021"

9) Check if trimmed name is 4 or more characters (kind of late), else bb

10) Let s1 be the result of joining: name + ' ' (space) + constant "Jalolo" ... "Chilling Jalolo"

11) Let s2 be the result of joining: s1 + constant "WhoamI?" ... "Chilling JaloloWhoamI?"

12) Generate a seed by applying same SDBM Hash method on s2 (uppercase, add a null byte at start, ...) to get:

0x3F494D414F48574F4C4F4C414A20474E494C4C49484300 = 0x0BE39B81 ... seed

13) Build & check part5:

Using xxHash64 (Yann Collet), perform xxHash64(WideString(s1), Integer(seed)) = "2C51325133CEA38" <> to p5

If all goes well then (goodboy). Let me know if I've missed anything :)

Other combinations:

name: XorRanger's Go Figure Fixed!!!

serial: Rz;aAkGuG3Xtlk>V;+/zV0Tj|H.(~*AShw`EwnLdR2<:9[ZXjDhb|v1X;Lc

name: Happy New Year!

serial: E2wbCkcMh2E{(v$M)L!cgvY0|HS*SCBSn!IbLm?R$J+BD+gSzwIzml&M7Ia

kg.7z