table of Contents
srm-50
Check the shell
No shell, use
Run it to enter the test email and serial number registration failed
Use IDA static analysis
Use String under view to find the Registeration string
ctrl+x to continue tracking
Locate this function
Analyze this function carefully
The bit length of the judgment sequence number should be 16 v11[4]+v12…v23
The serial number can be derived directly with the aid of judgment and verification
Get the serial number: CZ9dmq4c8g9G7bAX
Enter the program to run, you can get the flag
flag：
CZ9dmq4c8g9G7bAX