10
votes
Accepted
Need advice : Reverse engineering a pdf with shellcode
The shellcode is unicode escaped. You can convert it to its hex representation using a simple python script.
from binascii import unhexlify as unhx
encoded = open('encoded.txt').read() # The ...
- 5,850
7
votes
Accepted
Any tool for finding IP that a process use/access?
Linux
As @Nirlzr correctly mentioned, netstat -ape | grep <proc_name/pid> will show you the active connections of a process. It might be just enough for you but there are some cases where it ...
- 8,589
6
votes
Returning a C function to its grandfather
I'm on a 64-bit machine.
Your code in function_b() treats pointers as 32-bit values instead of 64-bit values. You should be using uint64_t* instead of uint32_t*.
- 20.4k
4
votes
Accepted
Extracting threads' stack from Windows memory dump
I am Not Sure what you are looking for let me try
i have a dump file of a vm too MEMORY.dmp from a vm that ran xp sp3 created using .crash from a kernel debugger attached to it
i loaded it ...
- 14.8k
3
votes
Understanding the output of Windbg's `dds esp`
The stack can be used to hold all kinds of values, including ones that look like return addresses but aren't. If stack-frames are omitted, then it becomes very difficult to trace backwards without ...
- 4,511
3
votes
Accepted
Tracing Callstack Despite Paged out Instructions
The prompt shown is kd> so you are debugging a live kernel.
If memory could not be accessed windbg will show ? Not 0000
maybe you actually have 0000 in the address.
Did you try doing .pagein ?
...
- 14.8k
3
votes
Accepted
Why do debuggers sometimes not show entire call stack?
Olly and WinDbg generate the 'call stack' by parsing the actual stack utilizing function signatures and calling convention. When the disassembler doesn't have the signature (e.g. when the developer ...
- 2,806
2
votes
Accepted
Understanding the output of Windbg's `dds esp`
dds means dump dwords intrepreting the result as symbols
suppose 0x401234 contains 0x77123456 and
0x77123456 is resolved as kernel32!CreateFileA
dds 0x401234 will yield kernel32!CreateFileA
if ...
- 14.8k
2
votes
Accepted
usercalls in old Win32 game
Yes, this sounds perfectly normal. If the program did not use C++, you won't see thiscall with usage of ecx but just standard stdcall or cdecl which use only stack for passing arguments.
- 34.6k
2
votes
Estimate depth of call stack without symbols
ret instructions are not going to the call stack. When a function executes call, the next instruction address is pushed to the stack and when ret instruction is executed, eip is updated with the next ...
- 1,748
2
votes
What is the difference between xrefs and stack trace?
x-refs is just a static cross-reference in the binary that can be identified during static-analysis.
So if you main call funcA you could tell that by looking at x-refs on funcA. But you can't be ...
- 4,512
1
vote
Accepted
Android Reverse Engineering Network Traffic Stack Trace
Hello you can start with the following approach:
Decompile the apk file with apktool
convert classes.dex to .jar with dex2jar
open the file with some java decompiler. My favorite is Luyten
Find ...
- 258
1
vote
VC 6 C++ Exception handling, nTryBlocks=0, pTryBlockMap=0 , how?why?
Actually it was so obvious - I just haven't read the C++ standard and was writing throw() specification thinking it would allow all exceptions - instead it turned out it was the exact opposite.
And ...
- 383
1
vote
Accepted
What is a good resource to learn about how the call stack works while programming in C?
What I do NOT understand is how all the registers and the call stack fit together with this picture and what each registers is supposed to point to.
It's great that you are competent in C, but there ...
- 6,829
1
vote
Any tool for finding IP that a process use/access?
Since OP's answer was a bit low on details, i'll assume Linux and Dynamic IP.
On most OSes there are tools to list network resources taken by processes. This often includes IP addresses and ports ...
- 11.3k
1
vote
Trace system calls, including stack (and java stack if possible), on android?
you can get system call stack with strace too. you just need to compile strace with libunwind. After that you just need to use -k to get system call stack for each system call.
- 11
1
vote
Trace system calls, including stack (and java stack if possible), on android?
JavaJournal, which was built on top of the pyspresso framework, was designed specifically for tracing method calls in Java.
- 20.4k
1
vote
Need advice : Reverse engineering a pdf with shellcode
The answer by extreme coders was wonderful,i wish to share my method too over here:
I convert it to an executable with the tools in REMnux:
remnux@remnux:~$ unicode2hex-escaped < sc.txt > sc2....
1
vote
Tracing ("logging") the stack without setting a breakpoint?
The approach you describe is implemented in several profilers, usually under the name sampling profiler. What it usually does is:
periodically (e.g. every 100ms) suspend the application
get the ...
- 34.6k
1
vote
Tracing ("logging") the stack without setting a breakpoint?
A debugger cant read/log the Stack when an application is running and not stepped or paused.
The closest thing to what you wanna do is called tracing and supported by some debuggers like OllyDbg and ...
- 336
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