Questions tagged [networking]
Any kind of communication between computers using a protocol and the infra-structure that allow this communication.
59
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Malware analysis - Debugger hangs at HttpSendRequestA
I'm reverse engineering a malware that at some point tries to connect to http://api.ipify.org in order to get the IP address of the infected PC.
I was able to replicate this behaviour with a small ...
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0
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Decoding the Apple vendor tag in the 802.11 beacon
Background
Looking to answer Is there a way to detect if you're connected via a shared WiFi Hotspot? on apple.stackexchange.com lead me to How does iOS and OS X detect when a Wi-Fi network is a ...
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How to re-create media file from android sender output stream
I would like to perform dynamic analysis on some android apps to check if these apps sending metadata with media files or not.
Ideas like the picture below:
Step 1: I prepared an image with metadata (...
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2
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Understanding gRPC message
Problem
I intercepted a gRPC network request from an application, and I intend to modify the contents and resend the message programmatically. As no tools (except for MitmProxy, see below) were able ...
2
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Where is Zyxel nas326 system log files. and how to see failed login ip
Does anyone know where is log files in the Zyxel nas326? I want to send failed tcp login ip to my server so I know if someone is logging in to my nas and I can block the ip.
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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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2
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0
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66
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Help MMO Tcp Packet
I'm trying re-send the packets that an MMO sends to the server just to learn more about packets. The game uses TCP.
I sent the same message in the game chat "oi"
to analyze the packages sent ...
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0
votes
1
answer
96
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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 ...
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1
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2
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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 ...
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1
vote
1
answer
269
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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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206
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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 ...
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2
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2
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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 ...
- 155
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0
answers
115
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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 ...
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0
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73
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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 ...
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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 ...
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3
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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 ...
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2
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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 ...
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1
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0
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40
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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 ...
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1
answer
180
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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 ...
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1
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1
answer
109
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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 ...
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0
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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 ...
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56
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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 ...
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1
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236
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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 ...
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131
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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 ...
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2
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407
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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 ...
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496
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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 ...
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2k
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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. ...
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1
answer
137
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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 ...
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0
votes
1
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116
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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 ...
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0
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523
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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 ...
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178
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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 ...
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1
answer
175
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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 ...
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3
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0
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77
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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 ...
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228
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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:...
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1
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743
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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.
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2
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2k
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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 ...
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1
answer
350
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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 ...
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1
answer
885
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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 ...
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1
answer
672
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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 ...
2
votes
1
answer
490
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?
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answer
634
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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 ...
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votes
2
answers
416
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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 ...
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2
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819
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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:...
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334
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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, ...
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3
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8k
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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 ...
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1
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116
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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 ...
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4
answers
1k
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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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3
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1
answer
292
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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 ...
1
vote
1
answer
428
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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 ...
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2
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681
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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 ...
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