Questions tagged [networking]

Any kind of communication between computers using a protocol and the infra-structure that allow this communication.

Filter by
Sorted by
Tagged with
0 votes
1 answer
31 views

Interpreting Response for Modbus/TCP function code 0x08 Diagnostics

A client application sends a Modbus 0x08 diagnostics query to Schneider modicun PLC over TCP/IP. The software describes itself as designed for Modicon Micro/Compact/Quantum/Momentum/584/984. Payload ...
user avatar
1 vote
2 answers
74 views

What is the best approach to reverse a custom TCP Application Layer?

I have recorded a TCP Stream using Wireshark, so I have Client/Server Communication as a hex dump. What is the best approach to reverse the custom application layer? Some data seems to be ascii ...
user avatar
0 votes
1 answer
48 views

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 ...
user avatar
0 votes
0 answers
94 views

Warframe Network Communication

Warframe is a MMO that has both servers and peer to peer networking, I am looking into the server side of things. What I am wanting to achieve is client communication to a emulated server. So far I am ...
user avatar
1 vote
2 answers
60 views

Trying to reverse web application connection, but the network tab shows nothing

I've been checking out metaverse-sensation Decentraland (play.decentraland.org) and I'm interested in how they've implemented the massive multiplayer netcode to work well for tens of players at the ...
user avatar
  • 145
2 votes
0 answers
93 views

Twitter scraping using Python

I've been working on a project to reverse-enginner twitter's app to scrape public posts from Twitter using an unofficial API, with Python. (I want to create an "alternative" app, which is ...
user avatar
  • 21
0 votes
0 answers
67 views

SSL pinning deep problem

I'm working on one Android app for potential malware analysis and I am trying to MITM it. I found out that the verify function never executes (X509 class) when i hook onto my proxy but rather that app ...
user avatar
0 votes
0 answers
386 views

SSL pinning and bypass

I'm currently investigating one very suspicious app on my system (Windows 10 x64 bit). I wanted to try and understand outgoing https traffic it utilizes by trying to MITM it using Fiddler but as I ...
user avatar
1 vote
3 answers
727 views

CaptureBAT equivalent on Windows 10?

Hello RE community on stack ! I am a beginner, so please pardon any commonplace errors I am looking to run CaptureBAT on a Windows 10 VM, to capture network activity of different kinds of Malwares I ...
user avatar
1 vote
2 answers
80 views

Identifying hosts on a network with no DHCP

I have a router with an unknown IP address with no functioning DHCP server. I have to connect to the router using a static (non-DHCP) IP (I have tried several including 192.168.1.10). The link LED ...
user avatar
  • 111
1 vote
0 answers
28 views

API-Monitor not logging buffer

I have a problem with API-Monitor. When I try to capture data (here: network traffic), API-Monitor doesn't log the buffer from the recieved data. For send() it works well, but for recv() it doesn't ...
user avatar
  • 21
1 vote
1 answer
94 views

How to read data from android.car.cluster

While performing a vulnerability scan for open ports of an Android Automotive Infotainment system, I found out that port 5151 is open. Doing a netcat on the open port, reveals a continuous stream of ...
user avatar
  • 111
1 vote
1 answer
51 views

Inbound network queries not appearing in developer tools of browser

When trying to understand the behavior of web apps, I find myself stumbling against the fact that some network messages do not appear on the network tab of the web developer tool of the browser. For ...
user avatar
  • 111
1 vote
0 answers
77 views

Restoring online functionality of an obsucure Korean PS2 horror game

Last year I posted for help in order to reverse-engineer and translate a Korean exclusive Horror game for the Playstation 2 called Mystic Nights. Here is the Original Post. Thanks to the kind folks ...
user avatar
  • 43
0 votes
1 answer
50 views

What browser do during initial web page request?

I am trying to understand why if I do fetch() 4 times on the active web page, after the fifth fetch server returns response that I am a "robot" I am using google chrome I go the following ...
user avatar
1 vote
1 answer
150 views

Spoofing DNS to intercept iot traffic

I've got a bunch of IoT devices that can only be controlled through the Internet, as all their traffic goes through their own "cloud" server. I want to reclaim full control and low latency ...
user avatar
  • 111
0 votes
0 answers
76 views

Where are private keys for Google Play stored on an android device?

I am running an application in BlueStacks that was installed with Google Play and am trying to look at network packets which are encrypted using RSA over TLS. I can see the client key exchange packet ...
user avatar
  • 1
1 vote
2 answers
298 views

NOPed encrypt/decrypt functions in a Path of Exile client and now it crashes without message. Next step?

I am reversing an old Path of Exile client with the purpose of building an emulator. I managed to reach the character select screen in a newer, 64-bit client but I am struggling to make the same ...
user avatar
1 vote
0 answers
379 views

What is the header 'X-Goog-Spatula'?

I am blackboxing an android app to write an API for it. Many of the HTTP requests sent include a mysterious header with the name X-Goog-Spatula. If I do not include this structure, the request is not ...
user avatar
0 votes
0 answers
2k views

How to capture specific data packets sent in an online game?

I am playing an online MMORPG game, based on player versus player idea. In this game, characters have skills. I want to capture the sent packet, when a specific skill is pressed on keyboard or etc. ...
user avatar
1 vote
1 answer
114 views

Which JSON object compact binary serialization is this?

I am trying to reverse engineer an unknown JSON binary serialization format found in a request-response pair between a mobile app, and a server. Does anyone recognize this? I've attached the first ...
user avatar
  • 11
-1 votes
1 answer
97 views

Break when exe send tcp packet

When I debug exe file with Ida I want to put breakpoint before the exe file send tcp packet. When I listen with procmon I can see that this exe send and recive tcp packet. 1) I look on the exe file ...
user avatar
0 votes
1 answer
248 views

Determine checksum / CRC algorithm

I am doing reverse engineering on some network protocol. It is client to server communication and I am pretty stuck with identifying checksum (or CRC) algorithm used in packet structure. I tried ...
user avatar
  • 1
1 vote
1 answer
169 views

Encoding method of float

I'm reversing this game and got stuck. To make it simple, You have some amount of coins in the game (float or double) and you can spend it on some things. I started sniffing network traffic and ...
user avatar
  • 173
1 vote
1 answer
152 views

Difficulty obtaining malware traffic

I'm trying to get a particular piece of malware to beacon, and I have my box connected to remnux, with inetsim and fakedns running. Using this setup I have been able to acquire good pcap from most ...
user avatar
  • 153
3 votes
0 answers
66 views

Can a device be forced to stop using SSL? [closed]

Lately I’ve become interested in reverse-engineering the APIs used by the Nintendo Switch Online (NSO) services (especially to see if it would be plausible for me to access their Mario Maker 2 API ...
user avatar
  • 31
1 vote
0 answers
158 views

Intercept traffic from exe to my Java server

In Windows 10, I can easily intercept traffic of an application using Proxifier and route it to Charles proxy, so that I can inspect and edit the data. exe -> Proxifier (Socks proxy to localhost:...
user avatar
  • 151
1 vote
1 answer
611 views

Windows : Which process sent TCP/IP packet?

How do I find out which process has sent TCP/IP network packet? Are there some tools that can easily do this? Like in Linux.
user avatar
  • 11
0 votes
2 answers
1k views

How to breakpoint exe tcp packet

I am debugging an executable in windows with IDA. My exe sends a TCP packet and I want to see which function it uses to send the packets. I looked on the import tab and haven't found any function ...
user avatar
  • 503
3 votes
1 answer
305 views

What Checksum/CRC algorithm in RF packet?

I am banging my head to figure out the checksum of a RF device, it seems to be a simple one but no luck so far... The first 3 bytes is the SyncWord then 9 bytes is the payload and the last byte ...
user avatar
1 vote
1 answer
750 views

Reverse engineer CAN-Bus checksum

I am trying to figure out a checksum algorithm. D1 to D6 is data, D7 is a counter obviously and byte 8 must be a CRC, but I didnt have any idea on how to build it. Tried to check if it fits any ...
user avatar
  • 11
1 vote
1 answer
632 views

Network support when emulating firmware with QEMU

Continuing from this question: Firmware analysis and file system extraction? I am trying to run the QNap firmware using QEmu. I have basically the same firmware as is used in the question above. My ...
user avatar
2 votes
1 answer
479 views

DGA(Domain Generation Algorithm) based malware files

Where i can get DGA (Domain Generation Algorithm) based malware files for analysis? And,Can I get malware family names which is using Domain Generation Algorithm?
user avatar
  • 121
3 votes
1 answer
564 views

How to debug packet processing with overlapped socket on Windows

The problem is quite complex so i don't want to run into unneccessary details. I have a network application, that communicates with multiple clients at once via UDP. I haven't written it and there is ...
user avatar
  • 141
2 votes
2 answers
379 views

Getting started with reversing device network traffic

I am interested in starting to decode and understand some proprietary network traffic, sent from apps on various devices, such as my TV, game consoles, phones etc. Most of the things I want to look ...
user avatar
  • 23
0 votes
2 answers
769 views

Lutron Caseta Protocol over HTTPS

I have a Lutron Caseta light switch. When I open the iOS app, it connects to lutron.broker.xively.com port 8883. Using a fakedns server I was able to direct that to my server running netcat as follows:...
user avatar
  • 455
1 vote
1 answer
275 views

Reverse engineer LMTools server status enquiry

We are using FlexLM/Flexera/LMTOOLS (not sure which is the correct) as a licens manager for our Autodesk products. I don't know what version the server is, but I have a fairly old client version, ...
user avatar
  • 113
0 votes
3 answers
7k views

Limited BusyBox shell

I'm testing some embedded device, and there is lack of documentation. When I telnet to device, I get only limited shell. BusyBox v1.19.2 (built-in shell (ash) Enter 'help' for a list of built-in ...
user avatar
  • 113
0 votes
1 answer
114 views

How does some application get through the block when mobile data plan is exceeded [closed]

I have a mobile data plan of 2 GBs. When I exceed it, I always get redirected to the network operator's website when I trying to load an URL. For some reason Telegram(Android app only, Desktop app ...
user avatar
1 vote
4 answers
1k 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 ...
user avatar
  • 13
3 votes
1 answer
281 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 ...
user avatar
1 vote
1 answer
385 views

What checksum algorithm is this network protocol using?

I've been working my way through an undocumented TCP-based protocol by monitoring traffic with tcpdump, Wireshark, and some Python packages (scapy, numpy) with good luck so far, but I've hit a wall ...
user avatar
  • 41
2 votes
2 answers
616 views

Putting an application in between client and server

I'm attempting to reverse engineer (without dissecting the source code, as my understanding is that reverse engineering by analyzing input and output and building something from scratch that fits is ...
user avatar
  • 23
1 vote
2 answers
1k views

Find the right layer header for a corrupt pcap

So the problem is that i have a corrupt pcap file. You can find a the pcap file [here][1]. First i did the file command on it : the.pcap: tcpdump capture file (little-endian) - version 2.4, capture ...
user avatar
1 vote
1 answer
130 views

Find out how an Android app controls my AV Receiver

I have an Onkyo Audio Receiver (AR), and there is an Android app that I can use to control it, change the volume, the channel etc. As a little project at home, I'm working on an app that can control ...
user avatar
  • 111
1 vote
1 answer
144 views

Reverse Engineering an iBaby M6

The iBaby M6 is a pretty cool baby monitoring system with neat features. It has Android and iPhone apps but unfortunately, there's no PC interface. I was thinking that if the camera was broadcasting ...
user avatar
2 votes
2 answers
1k views

Identifying protocol in a pcap file?

Is it possible to identify a protocol in a pcap file? I have a file which is a capture of data going between my phone and an IP camera, and I'd like to identify the protocol. I am using the app "MEye" ...
user avatar
3 votes
0 answers
182 views

Retrieving database credentials with access to an application that can connect and execute

I was asked to help extract information from an old Progress database. I have physical and remote access to both the database server and a workstation with the client application installed. I am able ...
user avatar
  • 31
9 votes
3 answers
12k views

Guessing CRC checksum algorithm

I am trying to reverse engineer a 16 bit checksum algorithm of one relatively old (10 years) LAN game that is no longer supported nor has source code available. As it seems, data packets don't have ...
user avatar
3 votes
1 answer
341 views

Reversing a router, single user mode

I'm trying to reverse engineer a binary running on a zyxel router. My first approach would have been to change the password within the .bin firmware itself, but as seen here, I'm having some trouble ...
user avatar