[gnomewascool]

> with keys that are in memory on the same system

I'm not sure that actually holds — the encryption keys are in memory, but the decryption keys don't necessarily have to be.

The pre-encrypted payloads definitely are in memory at some point; however snatching them probably involves larger-scale reverse-engineering.

[heinrich5991]

If they're using standard TLS, the actual data encryption is symmetric, so the encryption keys are the decryption keys and must be in memory during the encryption process.

[jborean93]

If it is TLS you can get the keys used in the session from lsass’ memory. I’ve even written a tool to do so in PowerShell https://gist.github.com/jborean93/6c1f1b3130f2675f1618da5663.... This will generate a log file that contains the keys needed for Wireshark to decrypt TLS traffic.