All Questions

Tagged with
Filter by
Sorted by
Tagged with
1
vote
1answer
168 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 ...
1
vote
1answer
999 views

Need some pointers to decode/decrypt/unobfuscate JSON files (updated with related scripts)

I am very new to this whole business so please bear with me. Goal My goal is to read JSON data from a game. Since I do not know what kind of information will/will not be useful, here are some of ...
1
vote
3answers
2k views

How to monitor/reverse engineer RS485-connected display device traffic?

Can anyone point me in the right direction for tutorials etc on reverse engineering RS484 connected battery management system? I have a large 12V lithium battery module which has an internal BMS and ...
3
votes
1answer
404 views

How can I determine if a piece of code is an encryption algorithm?

I am trying to reverse engineer a malware, and came across a piece of code that I suspect is an encryption/decryption procedure, however I do not know for sure. I can recognize that it extracts its ...
4
votes
0answers
658 views

Reverse engineer TPMS sensor data

I'm trying to reverse engineer data received from TPMS (car tire pressure) sensors. I was able to receive and demodulate the data (433 MHz, FSK, Manchester encoding). Probable packet fields: ...
2
votes
0answers
562 views

Reverse engineering TPMS sensor data [closed]

I'm trying to reverse engineer data received from TPMS (car tyre pressure) sensors. I used rtl_433 tool to capture the data from sensor at 433 MHz. Tool was able to detect data is using FSK modulation ...
5
votes
2answers
2k views

Retrieving encryption/encoding logic from dll

I am trying to retrieve a decrypting/deconing logic from a program. Unfortunately I have virtually no experiencing in reverse engineering. I am building an alternative controller application for a ...
0
votes
1answer
1k views

Invalid base64 encoding [closed]

I am starring at the following which looks like base64 but not quite: $ curl -s 'http://cgp.compmed.ucdavis.edu/chapr/education/PATHOBIOLOGY%20OF%20THE%20MOUSE%20TIER%201A/MICROANATOMY/Images/EX02-...
11
votes
3answers
5k views

Totally unknown file analysis approaches

I guess this is the worst case. I have a file which was initially base64 encoded. This step was easy. But now all I can see is a bunch of rubbish. No structure, nearlly a maximum of entropy, no ...