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RCE junk: [HBK]'s "Indiana Jones and the Wizard of Oz"

http://rcejunk.blogspot.com/2011/04/hbks-indiana-jones-and-wizard-of-oz.html

HBK]'s "Indiana Jones and the Wizard of Oz". Difficulty: 2][protection: Stone Temple Puzzle]. HBK]'s first submissions is a fun and creative crackme. Don't let the difficulty fool you! To gain access to the cave, all the letter 'tablets' must be 'pushed' hmm. no problem for indiana! Http:/ crackmes.de/users/hbk/indiana jones si vrajitorul din oz/. Subscribe to: Post Comments (Atom). Awesome Inc. template. Powered by Blogger.

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RCE junk: One Hell of an Anti-Debug! HideFromDebugger

http://rcejunk.blogspot.com/2010/10/one-hell-of-anti-debug.html

One Hell of an Anti-Debug! A target appears to have no protection whatsoever, allowing debug attach, stepping, breakpoint, etc. When a critical area is reached, however, the debugger seems to not work at all - the breakpoint instruction and single-step exceptions (C0000003, C0000004) get passed right over the debugger and to the target, where it displays an error message. Checked windbg on another machine, then olly - all tests exhibit same behavior. KiTrap03 before and after the protection, no changes.

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RCE junk: Numernia's "Keygenme Tre"

http://rcejunk.blogspot.com/2010/01/numernias-keygenme-tre.html

Difficulty: 4][protection: 0xECC9 :)]. Check out Numernia's new crackme at http:/ crackmes.de/users/numernia/keygenme tre/. Probably a little more difficult than 4, but totally possible! Subscribe to: Post Comments (Atom). Awesome Inc. template. Powered by Blogger.

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RCE junk: Shmoocon 2011 Crypto Challenge Pack

http://rcejunk.blogspot.com/2011/02/shmoocon-2011-crypto-challenge-pack.html

Shmoocon 2011 Crypto Challenge Pack. The Ghost In The Shellcode organizers gave me the privilege again this year to write some challenges for their CTF event. Here are the contents of the README:. Shmoocon 2011 Cryptography Challenge Pack. Http:/ www.ghostintheshellcode.com/. Https:/ www.shmoocon.org/ghost in the shellcode. These are the cryptography challenges submitted to the Shmoocon 2011 "Ghost In. The Shellcode" organizers for potential use in the CTF event and December. Values between external tools.

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RCE junk: Shmoocon 2010 Crypto Challenge Pack

http://rcejunk.blogspot.com/2010/02/shmoocon-2010-crypto-challenge-pack.html

Shmoocon 2010 Crypto Challenge Pack. These are the crypto challenges from Shmoocon 2010's "Ghost in The Shellcode" CTF event (see http:/ www.shmoocon.org/gits.html). My goal was to make algos that can be grasped quickly (minimal reversing), but remain challenging to keygen. Example codes are given in each respective crackmes' GUI. As always, true keygens are the only real solutions :). Http:/ crackmes.de/users/andrewl.us/shmoocon 2010 crypto challenge pack/. Subscribe to: Post Comments (Atom).

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RCE junk: Conjan's "Jump Around"

http://rcejunk.blogspot.com/2010/05/conjans-jump-around.html

Difficulty: 3][protection: mild asm obfuscation, trigonometry equation]. The serial verification function's instructions are reordered and linked with unconditional jumps. The solution shows how to disassemble the code into a linked list of instructions, remove the jumps, and recover the original code. Subscribe to: Post Comments (Atom). Awesome Inc. template. Powered by Blogger.

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RCE junk: Shmoocon 2011 Crypto Pack Solved! And Pairings And SAGE!

http://rcejunk.blogspot.com/2011/04/shmoocon-2011-crypto-pack-solved.html

Shmoocon 2011 Crypto Pack Solved! And Pairings And SAGE! I'm happy to announce a thorough and impressive solution to all the Shmoocon 2011 cryptography challenges by crackmes.de denizen Dcoder. Not long after Dcoder's solve, user ged posted valid serials for his name, but sadly never supplied an explanation of his methods. Is a clue. Blackboxing the function is even feasible. Recall the computational DH problem (CDH) by thinking of the eavesdropper's perspective of an DH key exchange. Eve views P. But if...

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RCE junk: gbe32241's SDDecoder

http://rcejunk.blogspot.com/2010/01/sddecoder-solved.html

I'm pleased to report that after nearly half a year of obsession, SDDecoder is solved. It is one of the most enigmatic crackmes posted to crackmes.de IMHO. My attack should work in general for any overlapping s-box scheme. The first implementation was made against SDD64 (the very reason SDD64 was written! Jan 13th, 2010 EDIT. Jan 27th, 2010 EDIT: Not challenged enough? See how SDDecoder (DRegZ) was built, and try JRegZ and QRegZ at http:/ www.webalice.it/giuliano.bertoletti/lca.html.

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RCE junk: MR.HAANDI's "Intersection #1.0"

http://rcejunk.blogspot.com/2010/03/mrhaandis-intersection-10.html

MRHAANDI's "Intersection #1.0". It's compiled against NTL and *alot* of code has to be sifted through to understand what is going on. It's a custom scheme:. Now a cubic equation arises because of the serial's exponent. The equation is reduced mod #E, which is composite. So it doesn't always have solutions. But you can produce many variations of the equation (one which hopefully DOES have a solution) by carefully tweaking the coefficient on the X 0 term. Http:/ en.wikipedia.org/wiki/Jacobian curve.