Questions tagged [encryption]
Process of encoding information such that decoding requires the knowledge of some secret (a key). This tag covers questions about obfuscated and encrypted programs, or tools, but higher level questions may get better answers on Cryptography Stack Exchange.
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Help on identifying encryption/encoding scheme
I am trying to find the encryption used in a legacy database.
The db is from 2003, and it is stored on a dbf (FoxPro) file.
The following are supposed to be ZIP numbers, more specifically, are ...
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How to identify digital signature and sign executables with it?
There is an embedded platform which requires signing binary executable file for them to be loadable onto CPU from flash. Signed executable consists from signature (first 40 bytes) and unsigned ...
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Decrypting encrypted PHP?
I was playing around with a tool I use, and hit a weird error with their wrapper script, so I thought I'd go see what it was doing. Only to discover something I've never seen before. The script looks ...
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Find encryption method, Decrypt Non-Cyrillic/Non readable characters
I have an old file, I know what it contains, I know that this is encoding without a password, any privatekey and secretkey. This is some kind of encoded file/string, possibly converted several times.
...
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Figuring out the algorithm for an NFC reader, which displays values increased by 1.52 times
I have two NFC readers, reader A reads card ID numbers according to the ISO standard and the algorithm is publicly available. Reader B is from a Canon printer. The card numbers read by reader B are 1....
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How to locate the code used for encryption of qrcode message in apk file
When I scan a QR code in this app it gives an encrypted message. I want to figure out what method this app used to encrypt their QR codes. I used Dextojar to look at the source code but couldn't ...
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McDonald's receipt codes
Receipts from McDonald's in the UK include a code that allows you to complete an online survey as shown in the attached image (in the green box):
After gathering and comparing several receipts I have ...
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537
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How can I extract the password from an installer/self-extracting archive?
I have an installer/self-extracting archive. The executable file has an embedded ZIP archive into it (like many other installers). The ZIP archive is encrypted with a password.
The installer DOES NOT ...
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How to identify encoding algorithm used
I'm using a calendar application, and each date is encoded. I would like to know which algorithm has been used to do this.
Example:
I have a date: 05-10-2023 ('mm-dd-yyyy') and it's encoded string is ...
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46
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I want to learn how to program by orienting myself to the task of reverse engineering
I have to learn programming from scratch and I want to orient my learning in order to be able to reverse engineer to break obfuscators. It would be helpful if you could recommend me what languages, ...
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How to read the content of these files?
I am looking for a way to read the content of these two files. If that is possible, please let me know.
Google Drive link for the files
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How to decrypt query string of an url
I need to decrypt the encoded part of query string i.e. Q7eM0euncHNyrhJPjN06lw== and sWmYdMUi01BJplzumEaxTw== from the following urls?
https://XXXX/deed-check/view-deed-summary?encApplicationId=...
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can sha1 hash of file converted to sha2 hash?
I have a phone database /data/user/0/com.miui.gallery/databases/gallery.db containing information such as exif data and file name. there is a column sha1 containing value
...
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Decrypt the cookies stored by the MS Teams desktop client
I am creating a digital forensic tool that gets all data of user from different platforms. I successfully have done extraction for Teams website but I am unable to do so for the desktop app. So far, I ...
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Extract assets images from a games APK [closed]
I'm trying to remove some images from an android game, but when I try to view them in a hexadecimal viewer I see that they don't contain a PNG header, so I can't view them through the python PIL ...
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4
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468
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Reverse Engineering CTF help
I am having trouble figuring out this microcorruption challenge in the link below: https://microcorruption.com/debugger/Halifax
Basically, the 0x7f interrupt has been disabled so I must reenable it ...
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Reversing an RSA function throws pkcs decoding error
I'm working my way through reversing a toy challenge, and I find myself stuck. The app is pretty simple, it spits out a blob of text (e.g. "3b880a90e476d66569d9d5dfb5cd755af3f..."). Dumping ...
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Looking for some help for decoding a signal from IR remote
The following signal has been captured from a remote that I suspect code for at least 3 things: the ID: 107, the item: 1, and the color. I didn't change the ID and item here (although I could do so ...
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151
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Reverse-engineering 24-bit to make the lock system recognize NFC cards as their own
I own a lock system that uses SRI512 cards.
My supplier (manufacturer of the locks) sells the cards at a very expensive price, so I decided to buy them online.
Once they arrived, when I tried to write ...
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163
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Find out used encryption in an SQLite database
Is it possible to see from a string which encryption an SQLite database uses? Let's say, I can open the database and see this: O45dTrA6NKG6SYeCENMwV7nxp66HR9lbhK12NGHgVnzEhebMjMJUhTmConk= - how do I ...
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133
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How would I decode this XOR Cipher
I have been given a XOR Cipher which is a bunch of hexidecimal looking charcters. This cipher is:
fa ce fd d3 fa df ed d3 fa ce d3 d3 fa de df d3
fa de df d3 fa de f9 d3 fa ce f9 d3 fa de f1 d3
...
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119
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Where can I find the hashing algorithm in source code?
When I submit login credentials in an Android Application it POSTs an encrypted string to an API endpoint.
For example, if I enter the following email & pass :
"[email protected]:abc"
it ...
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133
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Reversing encrypted file with unknown extension
Hello to everyone in RE section!
I have a binary file with questionable extension(meaning idk if its exe/dll).
Multiple variations of this file can be acquired throught connection to remote CDN via ...
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124
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Identifying the source of encryption used by UDP packets in a PCAP file
I have a PCAP file (mediafire link to the file) which basically represents packet captures between 2 machines running the same game connected to each other via LAN inside RPCS3 using RPCN.
One of ...
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Encoding scheme identification of the following communication message
I'm trying to RE an app for educational purposes.
So here is the behavior of the app.
When the app starts, it communicate with a server in plain tcp and based on those tcp messages, it either work as ...
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297
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Where can I find the encryption algorithm for this POST request in an Android APP?
I have an Android app for which I need to mock an API call outside of that environment. I successfully killed the certificate pinning on this app with Frida in order to access the URL and more, but ...
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75
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Password encryption when transferring from master to PLC
So, there is a PLC and a SoftMaster program to work with it. The PLC works according to the XGFenet protocol.
When connecting to the PLC for the first time in SoftMaster, a password must be entered. ...
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5k
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Extracting ZTE F670L router's config.bin file
I want to enable telnet in my router (ZTE F670L V9.0.11P1N20D), So, I backup my router and i have a file config.bin, Size 23.5KB. I fired up kali and when i issue this command:
$ file config.bin
...
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Where can I find the encryption algorithm in source code?
When I submit a Customer Reference ID in an Android Application it POSTs an encrypted string to an API endpoint.
For example, if I enter the following CR ID :
"SR-54585482"
it POSTs the ...
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261
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How to decode/decrypt/decipher an unknown 83 bytes long UDP payload?
I have an unknown 83 bytes long payload which I would like to decode/decrypt/decipher…
I got an alarm system from vendor www.jablotron.com, an old device, but it works perfectly.
It’s JA-63 with a LAN ...
A R
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469
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Decoding API response of unknown encoding?
I'm using Proxyman to inspect the api requests of an app I use. Most of the data is returned in plain JSON blobs but there is one response which is returning data encoded/encrypted. How can I go ...
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550
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Decrypting my router config backup file
so I have this ONT router/mode (ZTE F660) provided to me by the ISP, it's interface contains very little settings and I wanted to see if I can get anything useful from it's config backup file. The ...
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is it possible to get code out of chipset through reverse engineering?
for example, encryption/decryption mechanism was inbuilt in a chip, to get the code that performs this mechanisms, is there some ways you can get this code through reverse engineering? what tools and ...
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Issue in opening a file type after unzipping
I downloaded a file from this link https://storage.cloud.google.com/gresearch/smallcnnzoo-dataset/cifar10.tar.xz, and I successfully downloaded the archive file.I unzipped it using 7-Zip. After ...
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Decrypting .PNG files from Chinese mobile game
Amateur here.
I'm working on decrypting a couple of .PNG files extracted from an .apk of a Chinese One-Punch Man mobile game. They're identified as .PNGs by Windows, but can't be opened by any ...
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How can I decrypte the data in this SQLite Database file
I have this SQLite Database file
https://we.tl/t-RwKqYyS3D7
When I open it in notepad++, I got some decoded strings. I was trying to clean it and show only the strings without the symboles but then I ...
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548
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where can i find decryption key inside of the dll file?
I am testing a dll file , in a C# console app , and by the looks of it the dll file sends a web request with encrypted and then encoded values to a remote server.
after intercepting and analyzing the ...
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How to create an algorithm in C...(or C# or C++, basically in "a programming language")
After a LOT of sending challenges and recording the responses I've 'broken' the "encryption" in my car's immobiliser...the reason for doing it is so I can use the engine and transmission in ...
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The Logic Of Incremental Data on Serial Communication Encoding
These are the serial communication reverse values.
I am trying to understand the logic behind this.
I am pretty sure that 2 bytes represent 1 byte(high byte and low byte), values are correct.
I tried ...
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Java Help Understanding RSA Encrypt/Decrypt file and SD card
I was directed this way from the main superuser site:
I have zero experience with Java or Android apps (I have coding experience in C) and tried reverse engineering a [now defunct/unsupported] app ...
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How to find encrypted strings in an executable?
I am trying to reverse engineer an executable.
I am using Process explorer to dump all strings present in the exe image, and from the process's RAM when it is running.
The two dumps return a ...
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Find Decryption algorithm of an encryption algorithm
I recently work on an algorithm that encrypt some data with 8 byte length.
I worked hard and I successful to get this algorithm, but I need decryption of this algorithm.
How I can invert it?
I guess ...
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Best way to protect source code of exe that being loaded by Assembly.Load method
I am protecting an exe that being loaded by Assembly.Load... This makes everything difficult because most obfuscators causing it to not work properly or not load at all. I used confuserEx Ameteurz ...
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Is this executable packed, encrypted or what?
I have an executable that I'd like to patch, but I'm very new to RE. I some have assembly knowledge of x86 as first learned language last year, but not of this one: PowerPC (in this case is PPC32), ...
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ZTE AES-256-CBC Encrypted backup config file
i tried router pass view tool on (a closed source one) it's able to decrypt the older version of it V3.1. tested on two routers of it and it gave me this output
Encrypted Data Start Position: 227
...
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How does one start with reversing router config encryption?
There is not enough info on the web from what I have seen.
Most write ups/guides/blog-posts are like this:
They provide only the decrypt/encrypt script-tool with how to run it and nothing else
They ...
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Need Help with decryption backup config.bin file "ZTE ZXHN H267N v1.1"
hi i'm trying to decrypt config.bin file from new router I got from my company, I tried a tool found on github "https://github.com/mkst/zte-config-utility" I got this ERROR:
python3 examples/...
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Figuring out encryption technique of network connection
I am trying to reverse a virtualized program (using VMProtect 3.4.x). I decided to hook certain functions of the program such as the winsocks library send() and recv().
This is how it looks like:
[...
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Is it possible to somehow derive the decryption key for iOS app binaries?
While disassembling an IPA downloaded directly from the App Store CDN, I noticed that the binary had an unusually large entropy. Looking this occurrence up confirmed my suspicion that it was encrypted,...
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Need help with ZTE router config.bin file decryption and encryption
bin file extracted from a ZXHN H168N V3.1. RouterPassView is able to decrypt the file successfully but the tool can't re-encrypt the file, it gave me some info about the method used to decrypt here ...
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