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Questions tagged [strings]

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A chain of characters, usually used to store text messages lying statically in the program or to receive dynamically messages from the user.

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Abusing the strlen output

My question is related to the strlen function from the C and C++. I am reversing a program, that reads a byte data from allocated memory and sends to the strlen directly. To be completely honest ...
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68 views

IDA free : How to find a string reference in .text

To begin with, I'd like to point out that I'm very new to this. Here's the simple thing I'd like to do : The program I want to mess around with displays a msgbox with the string "Please run the ...
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2answers
179 views

How to identify the encoding performed on this string

I have an old application that stores the username and password in plaintext but encoded by an unknown encoding algorithm to me, it seams like base64, but I think it's not, It seams that any word ...
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1answer
65 views

How to find who use these strings?

When i see function like this, im getting confused, because all the strings i need in this function, but how can i find which functions which this strings? how can i know the address of the function ...
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1answer
26 views

Is there a way to export all the strings for a certain module in x64dbg?

I have an encrypted file that I was able to step through the code until that specific DLL file was decrypted in memory and I was able to list all of its strings. It has a ton of them that I would like ...
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1answer
74 views

How to view registers values in string

Is it possible that radare2 will show registers values also in strings ? For example, when I run ar I am getting the liste of registers and I have: rax = 0x000000042 Is there a way to also show ...
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1answer
79 views

Not able to find Hard coded strings in the mac executable file

I know that there is a string called "Activate your subscription" used in this particular app. But Im not able to find this string from its executable. I tried strings myapp and also searched for same ...
2
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1answer
96 views

obtaining string value from Unknown elf-x86-64 binary with gdb

I'm trying to find a string value stored in memory by a binary (possibly written in C) that won't show up when I perform "strings a.out". I have tried examining particular memory addresses of interest ...
2
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1answer
130 views

Find out string encoding/shift of proprietary binary file format

I'm trying to reverse-engineer a proprietary file format to be able to extract certain strings from files in this format. I have the application, that writes the files, at hand. By trial-and-error I ...
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2answers
178 views

How can I view in-memory strings of a process on Linux (Ubuntu)?

On Windows, I can use tools like Process Explorer and Process Hacker to view in-memory strings generated at runtime of a given process. How can I accomplish this same task on Ubuntu?
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1answer
133 views

Why can I see certain strings when PE is opened with a hex editor or a simple static analysis tool but not with IDA?

I found the executable in question using VirusTotal "hunting" feature, where one can run Yara rules for the files existing in VT database and match the strings. I downloaded the file, opened it with ...
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1answer
249 views

How do you print fixed width strings with radare's print format `pf`?

Let's say I have a byte sequence where U is an unsigned int (4 bytes), and ccccccccccccccc is a 15 byte character array UcccccccccccccccU Is it possible to print this structure using pf? I can print ...
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1answer
350 views

IDA 7 does not recognize/reference Delphi 16bits Strings correctly

I am dabbling with a XE3 Delphi application in IDA 7.0, and can't get Strings representation to work correctly: While selecting Delphi (16 bits) in the Strings Window yield correct results: ...
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1answer
97 views

Build Graph Printable String Information in ELF

I'm new in the field of reverse engineering to detect malicious code in ELF file. I used IDA Pro to retrieve a list of strings in an elf file. But I wonder if IDA can build a graph showing the link ...
2
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1answer
124 views

How can I generate the recovery password on a legacy system (Original company is out of business) running on my local machine?

I'm attempting to use a legacy systems recovery feature that typically required calling/faxing a company that is no longer around. Basically, the system was designed to go into a recovery mode and ...
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1answer
197 views

how to find the strings values in a comparision using ollydbg

In OllyDbg 1.10 (assembler level deubugger) I can find all referenced text strings The program compare if a user input string is equal a internal string. When I debug the program, I can't find the ...
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1answer
313 views

Hex-Rays function signature does not match demangled name

From the demangled name, I know that a function takes an std::string const& as a parameter but when generating psuedo-c code with Hex-Rays' decompiler it autodetects the parameters as (int a1, int ...
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1answer
105 views

What other methods can be used to find file paths in an executable?

I'm hacking a game in my library (Mirror's Edge) to re-route where the save data is located. I've done this with many other games successfully, but this one has me stumped. Normally, I start with HxD ...
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1answer
134 views

I'm would like to view this malicious payload, but am having trouble decoding it

This is a gzip compressed base64 string. I tried decoding it with an online converter but it said the data was corrupt. Can anyone decode this? H4sIAAAAAAAAAL1X6W6jyBb+...
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1answer
344 views

Dolphin Emulator Android port modifications

I am modifying the Dolphin Emulator Alpha for android, but I'm having some trouble with a string in it's smali code. The value I am having trouble with is dolphin-emu, it is the name of the folder ...
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2answers
290 views

How can I identify how this string is being encoded so I can replicate it?

A friends company uses an old VB6 application to generate encoded strings to then use in their also old and out of date database system. They have the application running in standalone mode so I can ...
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1answer
123 views

Is it possible to make a string bigger on an executable without breaking it?

I am a new reverse enigneerer. I know I can patch strings using a hex editor, but I obviously can't add or remove a single byte. Is there any workaround that will let me make a... let's say, 10 byte ...
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2answers
227 views

Problem with converting hex values to decimal

I'm reverse-engineering custom binary file format. I'm using 010 Editor to check this file. I found data structure to represent UTF-8 strings, which has header section of one or two bytes in length ...
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0answers
886 views

GDB find string strange results

I'm playing with gdb and strange things are happening. I wanted to find some address in memory where string "/bin/sh" is located, and gdb says it found it. But when I examine the memory there, the ...
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2answers
330 views

Cannot locate a variable on the stack

I am unable to locate a variable on the stack. I'm using Fedora 25 x64 but with a 32 bit program, btw. C program: #include <stdlib.h> #include <unistd.h> #include <stdio.h> #...
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2answers
7k views

OllyDbg: How to set conditional breakpoint on a register value?

I want to set a breakpoint when the register EAX references a specific Unicode string, e.g. "Enter". In Ollydbg there is usually right beside the EAX value a string that says "ASCII: Enter ". I read ...
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2answers
164 views

Identifying a very weak hash algorithm

I'm reverse-engineering a string translation file format for a particular game. It's ultimately just an ID-to-string map, where the IDs are four-byte integers. There are 1935 IDs in total; you can see ...
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1answer
263 views

Using HEX editor and making 4 chars from 3 chars [closed]

I need to replace a single string in a bin. The actual string has 3 chars and the new one must have 4.If I use a hex editor this will make the exe useless.So is there any way to add bytes there to ...
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1answer
441 views

How to find address of more complicated, unknown data structures

I am trying to read messages from a (32bit windows application) chat window. Unfortunately, the window has a custom class, therefore GetWindowText() doesn't help. I need to read the data from memory ...
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4answers
979 views

XMPP clubs in league of legends

Hopefully I'm asking this at the right place. League of legends recently added the option to join a club. Clubs still use the XMPP protocol just like before for their public chat rooms: XMPP for ...
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0answers
145 views

Modyfying PE file data section [duplicate]

I am a bit new to RE, so forgive me any weird or stupid questions. The app that I am currently working on has strings I need to modify in .data section. That's why Ollydbg doesn't allow me to copy ...
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1answer
938 views

Need help with searching for reference for a string in IDA Pro [closed]

I have a little problem, i have loaded some firmware to IDA and it didn't analyze it correctly so i did located and tagged all the strings manyaly but it didn't helped me to find the references to ...
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1answer
251 views

Is this a known encoding or cipher? (multiplayer game network traffic)

I'm trying to decode chat strings in a multiplayer game's network traffic; the way it encodes them is seemingly some arbitrary encoding. I've been analyzing the UDP traffic to the server with ...
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2answers
172 views

What compression algorithm could have generated these strings?

To what kind of compression algorithm could the following sentences belong to? AxFWR:YRCtIPns<_o%p_=Q>LELBM AxFWRPA:cXe#<InM=L:Mthwekblc AxFWREFEp`f?PU`;K;M:;P?MDMCL AxFWRW%VK>Hk]...
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2answers
3k views

Can't find “referenced string” in OllyDBG

So I am trying to reverse a program but I am not able to find any of the Strings through searching for "referenced Strings" or "binary Strings", I am new to OllyDBG and I don't know a lot about it, ...
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2answers
883 views

Find a string in an object file

I have a libcocos2djs.so file, which presumably is a mobile game using Cocos2d. Result of file: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /system/...
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1answer
69 views

Is there a website that hosts the strings application?

Is there website where you can submit an executable and it will run it through strings and give you the output?
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0answers
43 views

How to store a string securely inside your app? [duplicate]

Let's say you have an Android or iOS app, how can you store a web API key (a string) in your app securely, making it impossible or harder to reverse engineer. Some solutions I have thought about : ...
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3answers
1k views

Declaring block as a string in IDA

I'm reverse engineering a binary that has very generic, standard xor+math encryption on every string. I've written IDAPython to find each one(they're used in a generic way) and decrypt them, then add ...
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2answers
2k views

How can I find the source of a string in an old DOS game?

I am attempting to amend some strings in an old DOS game (FIFA International Soccer), specifically the names of players. In the past it hasn't been too hard to pull off such a task on post-DOS games ...
2
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1answer
355 views

Search through compressed/binary plist files in an IPA

I'm working on an iOS target. I'm effectively interested in running the program and its metadata through strings. I've noticed a simple grep does not return expected results and I suspect its because ...
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2answers
8k views

Looking for the specific text in EXE file

I want to find specific string in the EXE file but when I open the EXE file with OllyDBG and search for the All Referenced Strings I get bunch of texts in the comment area which are like this : ...
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1answer
270 views

Strange repeating string “FeTFeTFeTFeTFeTFe…” in binaries

Sometime, when doing reverse in some binaries I get this kind of ASCII strings: 00000000: 4665 5446 6554 4665 5446 6554 4665 5446 FeTFeTFeTFeTFeTF 00000010: 6554 4665 5446 6554 4665 5446 6554 4665 ...
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1answer
5k views

How can a format string vulnerability be used to write a specific string into memory?

I think I understand how a format string vulnerability works, but what I have seen so far it can only be used to increase the value of an integer. Can format string vulnerability also be used to ...
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2answers
869 views

Replace strings in object file

I have an object file under Linux with a lot of strings in it. I would like to replace all strings that represent a specific path in this object. I can see all the strings I need to change using the ...
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2answers
936 views

Automatic function naming

I'ld like to know how to bulk rename functions in IDA, based on some condition. Example: Rename all functions to Foo_XYZ where the function accesses a certain static variable, for example : ...
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1answer
2k views

String extraction from an iNES ROM dump

I want to extract the strings in Shadowgate for NES. I ran file on the image and then strings, no luck. I found some information about the NES cartridge file format. The docs mention the use of “Name ...
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2answers
15k views

How can I make IDA see a string reference?

IDA has disassembled the following code: seg019:C0292548 loc_C0292548 ; CODE XREF: sub_C0292414+11Cj seg019:C0292548 02 00 54 E3 CMP R4, #2 ...
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1answer
3k views

Printing Unicode strings in Gdb in OSX

Are there any useful snippets or Gdb functions that you guys normally use to print out Unicode strings? I'm trying to debug Mach-O binaries and x/s seems to be printing out junk. I believe the default ...
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1answer
7k views

What kinds of steps can I take to make my C++ application harder to reverse engineer?

If I am building a C++ application and I want to make it more difficult to reverse engineer, what steps can I take to do this? Does the choice of compiler affect this? What about compiler flags, ...