Questions tagged [unpacking]

Reverting (statically or dynamically) the effect of a binary packer: recovering its original structure and code by removing compression, encryption, protections features..

Filter by
Sorted by
Tagged with
0
votes
0answers
34 views

ollydbg help creating a patch

am new to ollydbg unpacking and patching. i have a programme packed with themida and i use a 1.3 unpacker script which opens the programme to the ebp opens the software up fully then i pause it here. ...
1
vote
0answers
43 views

How to extract an unknown archive files? (umd “I am alive” PC)

I'm trying to extract game files which contains textures, meshes etc. I wanted to see how hard would it be to make a texture mod. I just have knowledge on editing graphics from school and youtube ...
0
votes
1answer
78 views

The executable file makes a unique ID from each individual PC. Can anyone decipher from where the file makes these unique IDs?

The file generates random unique ID. It says hardware ID but I couldn't find it in product key, BIOS serial number or anywhere. I used IDA but I couldn't get from where the file creates the code. Even ...
1
vote
1answer
58 views

IDA debugging a packed / encrypted library - retaining breakpoints / subroutine names set in debug segments

I am debugging a library that is heavily packed / encrypted. Here is a flowchart of the operation of this library and where I am at in my reverse engineering: Assume it is not possible to modify ...
0
votes
0answers
182 views

Differences between IDA Pro and Radare2

I am familiar with Hopper Disassembler and OllyDbg as favorite and simple tools, but I would like to try switching to IDA to work on Windows. However, I know about radare2 and that it is open source,...
0
votes
1answer
156 views

How can I retrieve image files embedded/compressed in a MPL file?

There are some images hidden somewhere in a PE I have, I can't figure out how to extract them. This PE is from around 1997 (I think it's 32 bit) and I believe it contains some 3D model renders from ...
0
votes
0answers
66 views

convert NPRG9x07.mbn to NPRG9x07.bin

Hello i have qualcomm based bootloader for mdm9x07 platform i want to convert to bin format but i did not find any script that does the conversion here are the mbn files : NPRG9x07.mbn2 ENPRG9x07....
0
votes
0answers
40 views

How to execute an import exe/dll from memory

i dumped a exe/dll file from the memory with OllyDumpEx, now i understand i need to fix the address or something like this to use the dll or to run the exe, so how can i do that?
1
vote
1answer
332 views

unpacking Download.img firmware for alcatel mw40

Hello i'm trying to unpack file Download.img from alcatel mw40 (based on qualcomm 9x07) firmware but it seems i can't do it with 7zip or mount the img file . someone already extracted the file which ...
1
vote
0answers
692 views

Obfuscated Config Files: EHI Files for HTTP Injector

So I have an ehi file, which is a configuration file for an Android App called HTTP Injector. Of course when I try to see it as a simple text, I just get random characters. What tool could I use to ...
0
votes
0answers
138 views

Is there any way to change the encoding of an exe file?

I have an exe file and it will browse the xml, or txt files to display this exe file. And the characters only display the exact language of that country when I switch the language of the computer to ...
0
votes
1answer
58 views

Large number of exports defined in a PE .exe file

I have a (non-malicious) PE exe that I'm analyzing, which is using the Themida/WinLicense packer and noticed that it has 479 defined exports, which seems odd for an exe. Some of the functions are ...
1
vote
1answer
120 views

custom virtual machine protection

How someone would go to reverse engineer a sample protected with virtual machine : the problem is it's not opcode anymore it's bytecode which I don't have any idea about because it's a private virtual ...
0
votes
1answer
65 views

Windows GUI app without GetMessage imported?

I am currently trying to reverse an app and I have one very stupid question I cannot figure out by myself. The app was packed using FSG 2.0 and I successfully manually unpacked it and rebuilt the IAT ...
1
vote
1answer
252 views

.fpk firmware unpacking

I am working on firmware update file prod-build-Isat2-V02.00.03-DFU.fp2. I extracted it and I've got some bin files. I analyzed these binary files with binwalk: binwalk -E RDA-533.bin The entropy of ...
2
votes
0answers
239 views

Reconstruct InnoSetup file with existing CompiledCode.bin

Is it possible to somehow re-compile/reconstruct Inno Setup file and use existing CompiledCode.bin ? I dont have the source of CompiledCode.bin and writing from scratch is not an option. Basically ...
3
votes
2answers
277 views

Manually unpacking DarkTequila, stumped. Can anyone help?

The malware is packed w/ UPX - can see 0/1 in sections. Sure, I can can a tool or even use UPX -d -o flags .exe to create an unpacked copy with a >97% ratio, however I want to MANUALLY unpack it to ...
1
vote
2answers
840 views

Manually unpacking upx

As a first unpacking exercise, I decided to try to unpack the famous UPX (without using upx -d of course). I chose an executable I had somewhere, built from C++ code in debug mode. I packed it using ...
1
vote
1answer
850 views

How detect version of VMProtect

I have a binary with VMProtect. Some tools giving info that this is 2.x, some that 3.x. How I could check it? Thanks.
0
votes
1answer
164 views

.app file firmware unpacking

For analyzing firmware , I want to unpack the following firmware: https://www.inmarsat.com/wp-content/uploads/2015/02/Explorer_100_110_V2-11-3.zip After unzip, I've got file named "N03_A_E_D_02_11_03....
2
votes
1answer
259 views

General unpacking of packed malware

I did a brief survey on malware unpacking and I found several theses on automated general unpacking:Eureka, PolyUnpack, omniUnpack, Malware Normalization. However, these theses are written years ago ...
1
vote
2answers
1k views

Automating bypassing anti-debug checks

I'm working on bypassing the anti-debug checks of an unpacker in x64dbg. My end goal is to bypass all of the checks so that I can run the (unmodified) process with a debugger attached without any ...
1
vote
2answers
74 views

How can a Javascript file drop .exe written in Visual Basic without network communication?

I am analyzing a malicious JS file, which is obfuscated in a way that I could not de-obfuscate. When I executed it in a virtual machine and spectated process changes, I noticed that a new executable ...
1
vote
0answers
107 views

Binary Analysis Tool (BAT) no longer maintained - alternatives? [closed]

I read on the BAT github page that BAT is no longer actively maintained. Why did the project come to an end? What alternatives are there to unpack all kinds of archives / firmwares / binary ...
1
vote
1answer
207 views

Recreating a lzma archive (non-streamed)

I am reversing a Dlink camera firmware (dcs5000l_v1.03.05.bin) and am able to extract lzma data via dd and decompress it via lzma -d lzma_data.lzma. I want to be able to recreate the lzma archive from ...
0
votes
1answer
1k views

How to unpack(carve) files from a camera firmware .bin file? [closed]

Would anyone be willing to help me with carving/extracting files from a firmware file? I've tried to extract with binwalk, but it didn't extract everything. I checked it out with ent to see if there's ...
3
votes
1answer
820 views

How to unpack Inno Setup bundles with Arc+SREP data?

I've stumbled upon Inno Setup installer with additional separate Arc archives (commonly with .bin extension) that I was unable to extract using normal methods: the installer didn't work for an ...
2
votes
1answer
982 views

Extracting compressed firmware (NRV) for analysis

I want to analyze an embedded firmware (car's ecu). My problem is, the file is compressed. The firmware comes with a description xml file, which states that it is divided into sections and that those ...
1
vote
1answer
423 views

bypassing anti-VM inside protected samples

This is a good starting point. As you know: Sandboxes and virtual environments (hypervisors) are full of artifacts that betray their analysis environment. Malware can protect itself against these by ...
1
vote
1answer
419 views

De-compiling a random file format to retrieve the files?

Okay. I have a .VRCA file format which I want to retrieve the data from. Where would I need to begin in order to start retrieving data from one of these files. I've read multiple posts that mention ...
1
vote
2answers
611 views

FThunks when trying to get IAT

Pretty new to RE so sorry if this is a dumb question. I'm trying to manually unpack an executable and I believe I've found the OEP. However, when I use Scylla to try to fix the import table of the ...
-1
votes
1answer
410 views

Unpacking UPX OSX files

I was wondering if someone could provide me an UPX unpacker, which works with unix excutable files. I've tried a bunch of already, but all of those expect .EXE's which obviously won't work for me. ...
0
votes
1answer
2k views

binwalk showing “Unix path”, how to extract the filesystem?

When I run binwalk on a abs firmware that I'm trying to unpack, the output shows several "Unix path" entries DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------...
4
votes
4answers
12k views

Finding OEP in a VMProtect v3.0 protected malware

I've been trying to reverse engineer a malware that has been packed with VMProtect v3.0. My first instinct was to google an automated way for this and I found a script. Unfortunately the script to ...
0
votes
1answer
346 views

How can I circumvent rdtsc when used as an anti-debugger technique?

I using x86dbg and am working on unpacking a target. The unpacking stub appears to be using some anti-debugging techniques - most of which I can detour with a plugin. However, there are a lot of ...
0
votes
1answer
182 views

Pyemu - cannot use PEPyEmu() module, Python

I want to run code from Gray Hat Python book for upx_unpacker. I have downloaded PyEmu, but when I run script I got this error: AttributeError: PEPyEmu instance has no attribute 'load' My script use ...
1
vote
1answer
1k views

Binwalk could not extract the full content

Binwalk v2.1.1 on Ubuntu, and tried to research Zyxel Router firmware. First I unzipped FW, there was 3 files: 360AUG0C0.bin, 360AUG0C0.rom, AUG107.bm I used binwalk to extract content of bin file, ...
0
votes
1answer
428 views

Stone's PE Encrypter v2.0

Does anybody know an unpacker/decryptor that can unpack Stone's PE Encrypter v2.0? I found one but it was for a previous version, not version 2.0. IDA's universal unpacker seems to hang when trying to ...
5
votes
1answer
9k views

Unpacking a Themida packed x64 executable?

Before we continue I'd like you to keep in mind I'm relatively new to unpacking executables. So I have a few Recently I've been trying to unpack an executable (x64 architecture), aka find the OEP and ...
5
votes
2answers
314 views

What are some ways in which virtual machines make native static and dynamic reversing of a binary more difficult?

It is practically common knowledge in reverse engineering that trying to use a native debugger or disassembler on a "VM protected" or virtualized program is much more difficult to analyze. However, I ...
-3
votes
1answer
629 views

what does VA and OEP means? and How does IAT be fixed manually? [closed]

in the context of reversing a packed binary, what does VA and OEP means? and How can IAT be fixed manually?
2
votes
0answers
200 views

How can I fix an unpacked binary which calls out-of-bounds memory?

I've unpacked a binary which was packed with PECompact v2.2 (according to Detect It Easy) and successfully rebuilt the IAT. The binary actually does run, but when I open it in IDA Pro debugger, it is ...
2
votes
1answer
1k views

How to change the strings in rdata section of a executable file?

I'm a programmer and have an application (an executable file that maybe compiled from a c++ source). It has an rdata section (read-only data section) that include many (several thousand) strings of ...
4
votes
1answer
270 views

Decoding LZSS buffer lookup indices

I'm working on unpacking a camera firmware file which consists of various sections that I am able to correctly split and validate. One section within this file is additionally compressed with a form ...
3
votes
1answer
466 views

Animal Crossing: Pocket Camp .zdat File

Hello I am trying to obtain the music from the new game Animal Crossing: Pocket Camp. The music is contained in files like these: https://download-cdn-ac-pocketcamp.akamaized.net/assets/...
5
votes
2answers
670 views

Reversing Self-Modifying Malware

recently i got my hands on one sample that self-modifies its .text section. So, I placed a breakpoint on .text section on write operation and then continued. I found out that it zeroes out the .text ...
1
vote
1answer
148 views

How can I unpack this archive file?

I recently discovered a binary container file in a GameCube video game which I cannot unpack! I asked around, and I was told that it is an archive with this exact file structure: char Signature[8]; ...
4
votes
1answer
4k views

Unpack files from executable

I have an exe application that contains three files packed in it. I know how those files were named before packing, I have around 80% of packed files and some of main executable file binary code. I've ...
2
votes
2answers
737 views

Packed PE file and weird Header

I'm new to reverse engineering, so I don't know if my question will be easy or not. Right now I have an exe file, but it seems packed. In the hex Dump I do have the followings : 000003d0: 0055 5058 ...
0
votes
2answers
518 views

Manual unpacking petya ransom [closed]

I want to manually unpack red Petya ransomware. I used Ollydbg for unpacking and set breakpoint on VirtualAlloc to see the "MZ" header in memory dump, and saved it to a file. But the saved file is not ...