korsader on 2022-01-29 07:32:
Welcome!
Please enter an username: korsader
Please enter your password: 806601
Somehow you got it right!
danleb on 2022-02-04 17:14:
[Click to reveal]It was interesting, thank you!
My solution:
Welcome!
Please enter an username: danleb
Please enter your password: 411994
Somehow you got it right!
nogame on 2022-02-22 12:32:
[Click to reveal]Welcome!
Please enter an username: nogame
Please enter your password: 435390
Somehow you got it right!
nogame = 0x6e 0x6f 0x67 0x61 0x6d 0x65
sum = 0x6e + 0x6f + 0x67 + 0x61 + 0x6d + 0x65
sum = 0x277 = 631
password = sum * (int)(sum * 1.093829989433289)
password = 631 * (int)(631 * 1.093829989433289)
password = 631 * 690
password = 435390
db123 on 2022-06-20 08:51:
[Click to reveal]username: db123
password: 132240
1. remove debugger check by change jz to jmp.
2. input a user word. find code at:
.text:00007FF79A381640
.text:00007FF79A381640 loc_7FF79A381640: ; CODE XREF: check_password+A6↑j
.text:00007FF79A381640 F2 0F 59 05 78 40 00 00 mulsd xmm0, cs:qword_7FF79A3856C0
.text:00007FF79A381648 F2 0F 2C C0 cvttsd2si eax, xmm0
.text:00007FF79A38164C 48 63 C8 movsxd rcx, eax
.text:00007FF79A38164F 48 0F AF CF imul rcx, rdi
.text:00007FF79A381653 48 3B D1 cmp rdx, rcx
.text:00007FF79A381656 0F 85 C6 01 00 00 jnz loc_7FF79A381822
debug it, you will get a hex vlaue in rcx. convert it to dec value, and change to string. it is the password.
Sems on 2022-09-02 14:09:
Guys, why can't I see anything in the strings section of the object oriented crackmes written with c++ libraries (for example, the strings used for cout)