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Unanswered Questions

1,120 questions with no upvoted or accepted answers
11
votes
0answers
427 views

Problems calculating checksum for AirConditioner

I am trying to reverse engineer an AC Indoor unit <-> thermostat communication. So far I've succeeded in parsing the bits and bytes. I discovered that the upper and lower nibbles need to be ...
11
votes
1answer
3k views

Howto clone Android RSA SecurID Software Token

At the moment I try to figure out how the RSA SecurID Software Token protects itself from getting cloned to another android device. The token I imported has no device binding enabled and I already ...
9
votes
0answers
2k views

RE Tplink TD-W8960N V7

I am trying to reverse engineer a TDw8960 v7 TP-Link router. Currently the router has a bug, whereby setting the MTU via the GUI has no affect. It seems regardless of the value placed here despite ...
9
votes
0answers
899 views

Reverse Engineering 2 byte checksum on RFID card

I am currently researching my studentcard. Money is stored on this card. But the vending machine also checks a checksum on the card. I already did a lot of effort to find it but didn't succeed. The ...
9
votes
1answer
2k views

Anti debugging techniques - Preventing me from setting a memory and hardware breakpoint. How can i bypass that?

So im debugging this process which has a lot of anti debugging techniques in it, and i faced something new which i dont know how to bypass yet. Changing the code dynamically causes exceptions to ...
7
votes
0answers
459 views

Firmware analysis, can't find file system

I'm TV repair tech and I've found that corrupted firmware is responsible for the failure of a large portion of the TV's I work on. I came up with the idea that if I could reverse engineer the ...
7
votes
0answers
253 views

How do I reverse this firmware? 8-bit handheld console

I recently bought this chinese console that supposedly has 328 8-bit games. I want to understand the code and how it works to hack it and maybe load other ROMs. It has a chip covered in black epoxy ...
7
votes
0answers
320 views

Analyzing a Revit project file

I've been messing around with Revit and trying to understand the internal data structures for its file format. I'm not particularly experienced with this type of work and the processes around reverse ...
7
votes
0answers
767 views

Red Alert 2 Windows 8 DirectDraw compatibility

The game Red Alert 2 runs on Windows 8, but as soon as I inject a DLL (via ddraw.dll or an extra DLL) it stops drawing buttons on the main menu. With the DLL it still work fine in windowed mode and it ...
7
votes
1answer
6k views

What is a good and reliable C decompiler that support ELF and SH4 Architecture?

I have a ELF file, which is a partial firmware of a navigation module(my BMW idrive CCC), I need to decompile the elf file. I tried Reko Decompiler which said it does not support SH4 and Snowman ...
6
votes
1answer
329 views

Extracted router file execution

I am trying to run an executable file that I dug out from an extracted file system of a DSL modem router. So first of all I needed to either have a MIPS Linux box or take the emulation path. After ...
6
votes
0answers
1k views

Identifying a USB device for a forensics CTF challenge (with no GET DESCRIPTOR)

I'm currently enjoying a forensics CTF challenge. We were provided a PCAPNG file. When opened in Wireshark, the file contains a sequence of URB_INTERRUPT packets from two devices - but no ...
6
votes
0answers
244 views

How to find if a given library function is used in a binary?

Assuming that library X is statically linked, is there a way to know with an acceptable grade of confidence if a function from it was used in the binary? I am currently using this approach: Convert ...
6
votes
0answers
588 views

Reliable way to recognize STL template classes?

Since the template classes are different between instantiation, it is extremely difficult for library recognition using universal patterns. But the control flow graph and references to system call of ...
6
votes
0answers
674 views

Audio file compression identification

I've been working on reversing file formats from the game of star wars episode 1: the phantom menace. I have managed to extract the audio files from the .lab file in which they were contained. I ...

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