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12
votes
1answer
4k 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 ...
11
votes
0answers
760 views

Extracting strings from Go binaries

Is there an easy way to extract all of the strings from Go binaries that will work cross architecture? The problem with Go is that strings are stored without a null terminator, so you can't use the &...
11
votes
0answers
506 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 ...
10
votes
0answers
1k 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
0answers
3k 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 ...
8
votes
0answers
960 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 ...
8
votes
1answer
926 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
0answers
474 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
634 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
2k 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
1k views

Ghidra loading Linux kernel function signatures

TLTR I want to load Linux kernel headers vs. 4.19 to Ghidra so that it recognizes kernel structures and function signatures. Full description I'm trying to reverse engineer a Linux kernel module (...
6
votes
2answers
602 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
438 views

Radare2 - How to save/restore metadata in debug session (BPs, flag, comments..)?

How can i save/reuse/preserve Radare2 metadata (BPs, comments, flags..) of a debug session for a new debug session? I restart the debugger alot and preserving environment would be very helpful. I ...
6
votes
0answers
1k views

Generating symbol file for closed-source binary by hand

I have a closed-source binary (minecraft-pi). For a given section of the assembly like so: a2ed4: e92d45f8 push {r3, r4, r5, r6, r7, r8, sl, lr} a2ed8: e1a04000 mov ...
6
votes
0answers
310 views

replicate external bank switching in IDA Pro

I'm reverse engineering an embedded Z80 application in IDA Pro 7.0. The target system maps one address range to either of a pair of expansion boards. The address decode logic decides which board is ...
6
votes
0answers
660 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
5k views

How to unpack manually an upx packed elf file

I am trying to learn to manually unpack an upx packed elf file. The examples I have found are for Windows, mostly with Ollydbg, and as I see the first step is to look for pushad and popad instructions....
6
votes
0answers
834 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 ...
6
votes
0answers
476 views

How does my S62 engine utilize MAF sensors to convert voltage to mass flow?

We're trying to solve a puzzle on one of the automotive forums regarding how the BMW S62 engine utilizes its two MAF (mass air flow) sensors to determine the air mass flow entering the engine. This ...
6
votes
1answer
2k views

IDA Pro 6.4 android_server processattach failed

I would like to ask if anyone knows how to solve the above mentioned problem I encounter. I was reverse engineering an apk, and met a part where static analysis with IDA Pro is not enough, so I ...
5
votes
0answers
5k views

Deobfuscating Unknown C# obfuscator?

Hello, I am having an exe file that I am trying to deobfuscate and debug using dnspy. The exe file was written in C# and obfuscated with unknown deobfuscate according to de4dot! I tried to all my ...
5
votes
0answers
200 views

Radare2 8051 code bank switching

Some of 8051 chips use bank switching to extend accessible code memory. Good example is Silabs C8051F12x. Another example is here. Code area in range 0x0000..0x7ffff is common always accessible code ...
5
votes
2answers
907 views

Attach Shared Object to android process with IDA

I am: working with an Android game, using an Android Emulator, and trying to attach an android .so library to a process. I have the whole IDA server set up, I can attach to processes when a classes....
5
votes
0answers
1k views

I'm trying to debug small mips code snippets in IDA with QEMU as debugger, but only NOP instructions show when I start the process

I followed the tutorial IDA Help: Debugging code snippets with QEMU. It always worked with ARM code, but now I have to reverse some MIPS and only nops are displayed like this: Should I adjust ...
5
votes
0answers
346 views

Static Address in Dynamically Loaded DLL

I am trying to re-write the following function in my injected DLL. mov edi,edi push ebp mov ebp,esp mov eax, [sound.dll+1AE0] push eax mov ecx,[ebp+08] mov eax,[ecx] mov eax,[eax+0C] push eax call ...
5
votes
0answers
612 views

Reverse engineering an hydrometer's Bluetooth communication

This is a very specific question. I'm currently working on a project to create an android application capable of reading the values of an hydrometer via Bluetooth. By reading the datasheet, I suspect ...
5
votes
0answers
801 views

Python library for linux to demangle MSVC decorated names

I am looking for a python library for linux which can demangle the function names which are mangled by MSVC. for example : Project!??0?$allocator@D@std@@QAE@XZ to Project!public: __thiscall ...
5
votes
0answers
633 views

How to create HexRays variables in IDAPython correctly?

Let's assume we have a function which has a following variables in it: Local variables on stack of different types, including types defined in local types window Local variables of different types ...
5
votes
0answers
3k views

Load multiple modules in one IDA database

I have a game (Crysis 2) and the developers exported each DLL to be loaded separately by the main executable instead of merging all of them. Instead of having 9 instance of IDA open everytime and ...
5
votes
0answers
202 views

How to find the symbol table in a TI DSP. (TMS320C5510)

That's it, just want to know how to find the symbol table in a binary I pulled from a DSP chip. I know it could be stripped, just don't know how to tell.
5
votes
1answer
2k views

Understanding AutoIT "compilation"

I'm trying to de-compile a cheat created for my game so I can fix it. The problem is the version used is 3.3.14.2 which no longer has official de-compiler support. I have tried looking for 3rd party ...
5
votes
2answers
692 views

Getting empty files using firmware modification kit

im having trouble to extract a file system of a ZTE zxv10 h201 router. Im a beginner in reverse engineering so I am probably doing something wrong. This is what I have done so far. I got the admin ...
4
votes
0answers
76 views

Patching Jar File (2022)

Currently reversing a .jar program recreationally, and I understand the workflow proposed here: https://www.netspi.com/blog/technical/thick-application-penetration-testing/patching-java-executables-...
4
votes
0answers
337 views

How to extract sound file from a small 1MB binary

I have a bluetooth speaker which announces interface events like "connected", "powering off". I want to silence these announcements. The way I thought of doing this is to get at ...
4
votes
1answer
172 views

Reverse engineer compressed iOS app file

I want to find out the compression method used by an iOS app used for music notation to store its files. The files of its OSX counterpart are zipped files. You cannot create files in the iOS app, but ...
4
votes
0answers
3k views

Unpack, modify and rebuild an Android App Bundles (.aab) file

I would like to unpack an .aab file, decompile/recompile the classes.dex (baksmali/smali), edit the manifest and, finally, generate a new .aab file. Basically, I am looking for an apktool for .aab
4
votes
0answers
287 views

Legality of publishing decompiled code

The situation is the following: Binary file of a computer game from the 1980s. The binary file ran on a platform that doesn't exist anymore (not x86). The binary file does not contain any symbols or ...
4
votes
0answers
95 views

QEMU Translation block

I'm studying how QEMU translates native basic blocks and runs them. As far as I understand, it reads native basic blocks then retranslates them, but I wonder how it can deal with exceptions inside, so ...
4
votes
1answer
283 views

The buffer is too short to insert addresses when exploiting buffer overflow

Newbie here. Sorry for what you about to read . I'm currently working on exploiting a binary on Ubuntu 18.04. Here is some information about the binary: Its checksec information using pwntools: ...
4
votes
0answers
269 views

Trying to identify Renesas custom SoC through CPU die inspection

Was wondering if someone could help me identify which series a Renesas Custom SoC belongs to within the super-H family by looking at optical images of the die circuitry layout of the device, and by ...
4
votes
1answer
225 views

Are there existing automated approaches to reverse engineering the data types in a binary data stream?

Consider a stream of data packets of a known and consistent size, i.e., N bytes per packet. Are there existing tools that automatically detect (or estimate) the various data types present and their ...
4
votes
0answers
94 views

JTAG Dumped Flash is scrambled

I dumped the flash memory of an old ARM9 Chip running VxWorks using the SEGGER J-Link and the savebin command from J-Link Commander. Here is an example of a line of HTML stored on memory. <!DOC^...
4
votes
0answers
3k views

Extracting ARM Boot zImage

I'm trying to analyze the firmware of a system running Linux and connecting various home automation and security devices. Every time it boots, the GM8125 processor running ARMv5TE loads a firmware ...
4
votes
0answers
113 views

How does cartridge protection distinguish an original vs fake cartridge?

Based on what explained here, genuine ink cartridges may come with cartridge protection embedded in their chip. Once an ink cartridge is installed, printer will mark it as protected. What is ...
4
votes
1answer
502 views

Automate looking for calls to an offset of a structure

I want to automate the search for function calls to a function that does not live in the binary and where the function address is passed, via a pointer to a struct, at runtime through a function ...
4
votes
0answers
283 views

Using GDB to trace guest OS inside a hypervisor, the whole running on Qemu - kvm

I use Gdb to trace the execution (breakpoint, single stepping, ...) of a hypervisor OS in Qemu and it works fine so far. qemu-system-x86_64 -enable-kvm -display sdl -cpu host -serial my: stdio -m ...
4
votes
0answers
222 views

IDA memory mirroring

I am trying to reverse engineer an embedded firmware in IDA. It mirrors memory address 0x80000000-0x81FFFFF to 0xA0000000-0xA1FFFFFF. How do I setup IDA to recognise memory mirroring.
4
votes
0answers
619 views

Finding decompress algorithm for unknown compression

I have a raw data of what seems to be a compressed PNG file and I need to find the decompress algorithm for unknown compression. You can see the file here. I think they are using some kind of LZRW 1 ...
4
votes
0answers
658 views

How do I perform concolic execution with Angr and collect constraints on input?

I have a program that takes a string (with some structure) as input. My aim is to collect information on what values each character in input is compared to as it gets parsed using concolic execution. ...
4
votes
0answers
290 views

Instruction counting anti-debug

I recently came across this anti-debug technique being used in the wild. In The Ultimate Anti-Debugging Reference, the author wrote in the "Instruction Counting" section A debugger will interfere ...

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