Merge branch 'master' of github.com:failedxyz/easyctf

This commit is contained in:
neptunia 2017-03-17 19:14:43 -04:00
commit 2c5c7e31dc
16 changed files with 24 additions and 173 deletions

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@ -1,3 +1,3 @@
SUU<EFBFBD>‹‰û SUU<EFBFBD>‹‰û
ŒÔ#ÓDœöG•Z<12><1C><>)!!"rÛ5¥ã q£­{,./³Ý:À;o°`99:É3,:ÍRÈDºVšTm¸D\IjÌ”Y¡\ÛVXY¨Tœ ŒÔ#ÓDœöG•Z<12><1C><>)!!"rÛ5¥ã q£­{,./³Ý:À;o°`99:É3,:ÍRÈDºVšTm¸D\IjÌ”Y¡\ÛVXY¨Tœ
nsg@è%Gãi•{±qJ<71>avW,†y-öz{|$ŒpÙ@ÖÖvŠ—ƒ¬ɇ<07>qŸM<C5B8>¶`›Ï¥™™ši“<69>š»R®ûbVª·£Œ[¥ñ¨‰ö\¿ ¶—ìëàŒ>€»»¼È¶2NüÃÃÄ.ÁJF„ËË̉ŸB“ÕYÓ+ʼn‡ƒQ]‹ÜÞßÕ÷<EFBFBD>ºláÖ(`l¼ííî,jh˳¤™“œÚž<E280B0> ujf$gct|)d~aok}<1`|a{r7lv:-<nwxNHDJGDHSOCLY_K\;234åv^9šÝ®ýgP5a%,0e/3iIÐÒÕò %q6&97xWXYZ[]_][egekmomkege{}}{egekmomkege[]_][¥§¥«­¯­«¥§¥»½¿½»¥§¥«­¯­«¥§¥ÛÝßÝÛåçåëíïíëåçåûýÿýûåçåëíïíëåçåÛÝßÝÛ¥§¥«­¯­«¥§¥»½¿½»¥§¥«­¯­«¥§¥[]_][egekmomkege{}}{egekmomkege[]_][¥ nsg@è%Gãi•{±qJ<71>avW,†y-öz{|$ŒpÙ@ÖÖvŠ—ƒ¬ɇ<07>qŸM<C5B8>¶`›Ï¥™™ši“<69>š»R®ûbVª·£Œ[¥ñ¨‰ö\¿ ¶—ìëàŒ>€»»¼È¶2NüÃÃÄ.ÁJF„ËË̉ŸB“ÕYÓ+ʼn‡ƒQ]‹ÜÞßÕ÷³"èláÖ(`l¼ííî,jh˳¤™“œÚž<E280B0> ujf$gct|)d~aok}<1`|a{r7lv:-<nwxNHDJGDHSOCLY_K\;234åv^9šÝ®ýgP5a%,0e/3iIÐÒÕò %q6&97xWXYZ[]_][egekmomkege{}}{egekmomkege[]_][¥§¥«­¯­«¥§¥»½¿½»¥§¥«­¯­«¥§¥ÛÝßÝÛåçåëíïíëåçåûýÿýûåçåëíïíëåçåÛÝßÝÛ¥§¥«­¯­«¥§¥»½¿½»¥§¥«­¯­«¥§¥[]_][egekmomkege{}}{egekmomkege[]_][¥

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¼°wþ;$ân6ßi2*­Élu ež5ry ãi<19>åဠriZ?{ hpŽ0ä0$ùæ˜ flêgkß5.NÓâ)ˆW LL$ræ¶rü]<05> U)xˆŠrLOüM“\(¬l¯%wØ8trrq"˜j9úM8Þ®89:<3A><=>GGÊGÉiH¬qÿJKL…NOP%Y\â_ÜμZ[\ª¼Öæ„bcd¦®ghi±klmbû<rþX{<7B>}£yz{•}~ý<7F><C3BD><35>€ÏbBbŒ<62>Ž|<7C>˜™šœ<E280BA>žŸ µ£¤¥¦§¨©ª±ãÁßÕ<C39F>²Œ´µ¶å¸¹º»½¼¼¼ÄÄÄÄÌÌÌÌÄÄÄÄÜÜÜÜÄÄÄÄÌÌÌÌÄÄÄÄüüüüÄÄÄÄÌÌÌÌÄÄÄÄÜÜÜÜÄÄÄÄÌÌÌÌÄÄÄļ¼¼¼DDDDLLLLDDDD\\\\DDDDLLLLDDDD||||DDDDLLLLDDDD\\\\DDDDLLLLDDDD¼¼¼¼ÄÄÄÄÌÌÌÌÄÄÄÄÜÜÜÜÄÄÄÄÌÌÌÌÄÄÄÄüüüüÄÄÄÄÌÌÌÌÄÄÄÄÜÜÜÜÄÄÄÄÌÌÌÌÄÄÄļ¼¼¼DDDDLLLLDDDD\\\\DDDDLLLLDDDD||||DDDDLLLLDDDD\\\\ ¼°wþ;$ân6ßi2*­Élu ež5ry ãi<19>åဠriZ&s hpŽ0ä0$ùæ˜ flêgkß5.NÓâ)ˆW LL$ræ¶rü]<05> U)xˆŠrLOüM“\(¬l¯%wØ8trrq"˜j9úM8Þ®89:<3A><=>GGÊGÉiH¬qÿJKL…NOP+Y\â_ÜμZ[\ª¼Öæ„bcd¦®ghi±klmbû<rþX{<7B>}£yz{•}~ý<7F><C3BD><35>€ÏbBbŒ<62>Ž|<7C>˜™šœ<E280BA>žŸ µ£¤¥¦§¨©ª±ãÁßÕ<C39F>²Œ´µ¶å¸¹º»½¼¼¼ÄÄÄÄÌÌÌÌÄÄÄÄÜÜÜÜÄÄÄÄÌÌÌÌÄÄÄÄüüüüÄÄÄÄÌÌÌÌÄÄÄÄÜÜÜÜÄÄÄÄÌÌÌÌÄÄÄļ¼¼¼DDDDLLLLDDDD\\\\DDDDLLLLDDDD||||DDDDLLLLDDDD\\\\DDDDLLLLDDDD¼¼¼¼ÄÄÄÄÌÌÌÌÄÄÄÄÜÜÜÜÄÄÄÄÌÌÌÌÄÄÄÄüüüüÄÄÄÄÌÌÌÌÄÄÄÄÜÜÜÜÄÄÄÄÌÌÌÌÄÄÄļ¼¼¼DDDDLLLLDDDD\\\\DDDDLLLLDDDD||||DDDDLLLLDDDD\\\\

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@ -117,10 +117,10 @@ past_trash:
pop edx pop edx
mov eax, dword [esi+temp_val] mov eax, dword [esi+temp_val]
; 0x61375a7b = little endian of '{Z7a' ; 0x336a687b = little endian of '{hj3'
; 0x61375a7b ^ 0x3fab396d which is the value of the correct input 1.33769 ; 0x336a687b ^ 0x3fab396d which is the value of the correct input 1.33769
; is equal to 0x5e9c6316 ; is equal to 0x5e9c6316
xor eax, 0x5e9c6316 xor eax, 0xcc15116
mov dword [edi], eax mov dword [edi], eax
xor eax, eax xor eax, eax
mov dword [esi+temp_val], eax mov dword [esi+temp_val], eax

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@ -22,14 +22,14 @@ include 'std.inc'
; 3 - 5,7 - '_' ; 3 - 5,7 - '_'
; 5 - 7,11 - 'e' ; 5 - 7,11 - 'e'
; 7 - 11,13 - 'x' ; 7 - 11,13 - 'x'
; 11 - 13,17 - 't' ; 11 - 13,17 - 'z'
; 13 - 17,19 - '}' ; 13 - 17,19 - '}'
; 17 - 19,23 - '}' ; 17 - 19,23 - '}'
; 19 - 23,29 - '}' ; 19 - 23,29 - '}'
; 3 * 7 * 11 * 17 = 3927 ; 2 * 7 * 11 * 17 = 0x74e
; answer "2 4 6 12" ; answer "0 4 8 13"
; flag _xt} ; flag -ez}
start: start:
push edi push edi
@ -50,7 +50,7 @@ start:
jnz .lp jnz .lp
mov eax, dword [esi+super_val] mov eax, dword [esi+super_val]
cmp eax, 3927 cmp eax, 0x74e
jnz .bad jnz .bad
jmp .finish jmp .finish
@ -116,7 +116,7 @@ above_handler:
eleven: eleven:
dd thirteen,seventeen dd thirteen,seventeen
db 't',11 db 'z',11
mul_handler: mul_handler:
movzx eax, byte [ebp+9] movzx eax, byte [ebp+9]

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@ -1,13 +1,13 @@
def grade(random, key): def grade(random, key):
if key.find("Z7a_ok_qfme_xt") != -1: if key.find("hj3-0p9cgfb-ez") != -1:
return True, "Correct!" return True, "Correct!"
incorrect_txt = 'Wrong. ' incorrect_txt = 'Wrong. '
if key.find("Z7a") == -1: if key.find("hj3") == -1:
incorrect_txt += "Phase 1 failed. " incorrect_txt += "Phase 1 failed. "
if key.find("_ok_") == -1: if key.find("-0p9") == -1:
incorrect_txt += "Phase 2 failed. " incorrect_txt += "Phase 2 failed. "
if key.find("qfme") == -1: if key.find("cgfb") == -1:
incorrect_txt += "Phase 3 failed. " incorrect_txt += "Phase 3 failed. "
if key.find("_xt") == -1: if key.find("-ez") == -1:
incorrect_txt += "Phase 4 failed. " incorrect_txt += "Phase 4 failed. "
return False, incorrect_txt return False, incorrect_txt

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@ -62,10 +62,10 @@ printLoop:
mov ecx, dword [esi+inputVal] mov ecx, dword [esi+inputVal]
pop edi pop edi
; 433695873 is the answer ; 797691075 is the answer
; (struct.unpack('<I', b'_ok_')[0] ^ 0x19d9ac81) ; (struct.unpack('<I', b'-0p9')[0] ^ 0x2f8bccc3)
; This part of the flag is _ok_ ^ the 35th value in the pattern. ; This part of the flag is -0p9 ^ the 36th value in the pattern.
xor ecx, 0x46b2c3de xor ecx, 0x16fbfcee
mov dword [edi], ecx mov dword [edi], ecx
push edi push edi
@ -80,7 +80,7 @@ printLoop:
ret ret
pattern_text db 'What is the 35th number (index 34) in the following sequence?', 0 pattern_text db 'What is the 36th number (index 35) in the following sequence?', 0
format_text db '%d ', 0 format_text db '%d ', 0
; ecx = arg ; ecx = arg

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@ -92,7 +92,7 @@ fail:
mov eax, 0 mov eax, 0
ret ret
to_match db 'ezpr', 0 to_match db 'xtnq', 0
idiot: idiot:
lea ecx, [esi+idiot_text] lea ecx, [esi+idiot_text]
@ -104,7 +104,7 @@ idiot:
dec esp dec esp
ret ret
alphabet db '{m}krzyjfwngpshteoialduqxvcb|', 0 alphabet db 'hqxfbntvirwml{cap|z}sjeodygku', 0
; abcdefghijklmnopqrstuvwxyz{|} ; abcdefghijklmnopqrstuvwxyz{|}
; flag is "qfme" ; flag is "cgfb"
resv_stuff 512-$ resv_stuff 512-$

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