Cracking

Reverse binaries and crack executables.

This series of challenges will help you understand the inner workings of compiled languages. Disassemble the binaries provided to solve the crackmes at the assembly level.

Prerequisites:
- Advanced understanding of assembly languages on various architectures (x86, ARM, MIPS ...).
- Understanding of the different executable formats (ELF, PE, etc.).
- Mastery in the use disassemblers and debuggers.

 46 Challenges

Results Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution Date
pas_valide ELF x86 - 0 protection 15% 31041 5 g0uZ 10 7 October 2006
pas_valide ELF x86 - Basic 12% 25079 5 g0uZ 10 7 October 2006
pas_valide ELF x86 - Ptrace 3% 5622 15 g0uZ 3 27 November 2009
pas_valide ELF x86 - Fake Instructions 3% 6432 15 kmkz 5 21 February 2010
pas_valide ELF ARM - crackme 1337 1% 1722 30 Anonymous 2 3 February 2011
pas_valide ELF x86 - ExploitMe 2% 3274 30 kmkz 5 3 February 2011
pas_valide ELF x86 - CrackPass 2% 3714 30 Tosh 5 3 February 2011
pas_valide ELF x86 - Random Crackme 2% 2586 30 kmkz 3 3 February 2011
pas_valide ELF x86 - KeygenMe 1% 633 50 int_0x80 5 20 July 2011
pas_valide PE x86 - AutoPE 1% 625 45 Gr4ph0s 3 5 August 2011
pas_valide ELF x86 - Packed 1% 329 70 Tosh 3 18 October 2011
pas_valide PDF - Javascript 1% 1190 30 koma 1 14 February 2012
pas_valide ELF x86 - Anti-debug 1% 1335 45 Tosh 3 3 June 2012
pas_valide ELF ARM - Crypted 1% 483 35 koma 2 4 September 2012
pas_valide PE x86 - 0 protection 7% 13320 5 alejandr0 6 11 November 2012
pas_valide APK - Anti-debug 1% 1739 40 cryptax 3 18 December 2012
pas_valide PE x86 - SEHVEH 1% 903 35 Thanat0s 1 4 May 2013
pas_valide ELF x86 - VM 1% 466 90 Thanat0s 7 16 June 2013
pas_valide PYC - ByteCode 2% 3870 20 Thanat0s 9 3 July 2013
pas_valide ELF x86 - No software breakpoints 2% 3009 25 yodzeb 8 2 October 2013
pas_valide PE x86 - RunPE 1% 722 75 Thanat0s 5 16 December 2013
pas_valide PE DotNet - 0 protection 4% 6953 10 Geluchat 5 15 September 2014
pas_valide ELF ARM - Basic Crackme 2% 2719 20 0xmitsurugi 7 13 July 2016
pas_valide ELF C++ - 0 protection 3% 6541 10 sourcePerrier 4 13 July 2016
pas_valide ELF x64 - Anti-debug and equations 1% 294 65 0xmitsurugi 3 18 July 2016
pas_valide MachO x64 - keygenme or not 1% 1118 25 /bin/ls 1 14 April 2017
pas_valide ELF x64 - Nanomites - Introduction 1% 445 45 Phenol 2 4 March 2018
pas_valide ELF x64 - Nanomites 1% 254 70 Phenol 2 4 March 2018
pas_valide ELF MIPS - Basic Crackme 1% 2169 15 s4r 2 9 July 2018
pas_valide ELF x64 - Crackme automating 1% 662 35 0xmitsurugi 6 14 August 2018
pas_valide GB - Basic GameBoy crackme 1% 766 30 jambon69 2 14 September 2018
pas_valide ELF x64 - Golang basic 1% 1553 15 jenaye 3 8 November 2018
pas_valide PE x86 - Xor Madness 1% 443 30 ENOENT 3 17 July 2019
pas_valide White-Box Cryptography #2 1% 29 130 Cryptanalyse 1 17 July 2019
pas_valide Ringgit 1% 42 110 Cryptanalyse 1 6 October 2019
pas_valide ELF x64 - Basic KeygenMe 1% 453 20 fr0g 3 2 September 2020
pas_valide ELF x64 - KeyGenMe 1% 50 60 rene-d 0 12 November 2020
pas_valide ELF x64 - Hidden Control Flow 1% 30 100 so3 1 18 November 2020
pas_valide PE DotNet - Basic Anti-Debug 1% 236 20 nqnt 1 24 March 2021
pas_valide Bash - VM 1% 82 60 govlog 1 25 March 2021
pas_valide Lua - Bytecode 1% 139 25 Bernstein 0 25 March 2021
pas_valide WASM - Introduction 1% 100 15 Cyxo 0 26 March 2021
pas_valide WASM - Find the NPC 0% 4 50 Cyxo 0 26 March 2021
pas_valide Powershell DeObfuscation 1% 90 35 hat.time 0 2 April 2021
pas_valide PE DotNet - Basic Crackme 1% 122 20 nqnt 0 14 April 2021
pas_valide PE DotNet - KeygenMe 1% 43 45 nqnt 0 14 April 2021

Challenge Results Challenge Results

Pseudo Challenge Lang Date
Walleza   PE DotNet - Basic Anti-Debug 16 June 2021 at 00:22
Walleza   PE DotNet - 0 protection 16 June 2021 at 00:15
FalseDee   PE x86 - 0 protection 15 June 2021 at 23:18
CL0Pinette   Lua - Bytecode 15 June 2021 at 22:42
mike1796   PYC - ByteCode 15 June 2021 at 21:39
sqzzprod   PE x86 - 0 protection 15 June 2021 at 21:27
sqzzprod   ELF x86 - Basique 15 June 2021 at 20:59
sqzzprod   ELF x86 - 0 protection 15 June 2021 at 20:39
vedipot   ELF x86 - Basic 15 June 2021 at 19:01
vedipot   ELF x86 - 0 protection 15 June 2021 at 19:00