vos and snk from MSLC share their basic view of Attack-Defence CTFs and tell random stories in their two-hour talk at Chaos Constructions 2014. With English subtitles
Tag: defcon
Jun 17
Defcon CTF Quals 2013 – \xff\xe4\xcc 4 (penser)
good luck. penser.shallweplayaga.me:8273 http://assets-2013.legitbs.net/liabilities/penser Download penser binary » Summary: x86_64 Unicode-proof shellcoding.
Jun 17
Defcon CTF Quals 2013 – \xff\xe4\xcc 3 (linked)
typedef struct _llist { struct _llist *next; uint32_t tag; char data[100]; llist; and: register char *answer; char *(*func)(); llist *head; … func = (char *(*)(llist *))userBuf; answer = (char *)(*func)(head); send_string(answer); exit(0); Write me shellcode that traverses the randomly generated linked list, looking for a node with a tag 0x41414100, and returns a pointer to …
Jun 17
Defcon CTF Quals 2013 – All Web Challenges (3dub)
Summary: 3dub (1) – babysfirst: SQLite SQL injection 3dub (2) – badmedicine: Stream cipher bit flipping 3dub (3) – hypeman: Rack/Sinatra session secret disclosure 3dub (4) – rememberme: Bruteforce 3dub (5) – worsemedicine: Block cipher bit flipping
Sep 30
Xakep Magazine. Defcon 19 CTF Report
Today October 10 (153) 2011 Xakep (“Hacker”) magazine issued with our (team IV) Defcon CTF report. Full article you can find when you buy the magazine.
Sep 13
DEFCON 19 Final – hiver
This challenge was on logic and understanding of the bloom filter. The binary is for FreeBSD. binary Summary: understanding of the bloom filter, bruteforce bloom filter set.
Sep 13
DEFCON 19 Final – forgetu
This challenge was on remote exploiting. The binary is for FreeBSD. binary Summary: bruteforce password, buffer overflow, jump to shellcode
Aug 12
Team IV took 4th place in the DEFCON 19 CTF FINAL
LeetMore in the Team IV took 4th place in the DEFCON 19 CTF FINAL! Congratulations guys! This is definitely a great achievement! Proof: http://ddtek.biz
Jun 09
Defcon CTF Quals 2011 – Retro 400
This challenge was on remote exploiting. The binary is for FreeBSD. The program is some kind of a Virtual Machine, with it’s own stack and memory. binary Summary: memory address check mistake, write shellcode and overwrite _exit function pointer
Jun 08
Defcon CTF Quals 2011 – Binary 500
This challenge was on reverse engineering. The binary is 32bit MZ-PE executable for Windows. binary Summary: reverse engineering, anti-anti-debugging challenge
Jun 07
Defcon CTF Quals 2011 – Pwnables 100
This challenge was on remote exploiting. The binary is for FreeBSD. binary Summary: buffer overflow, jump to shellcode (bruteforce address)
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