update readme.md

README.md

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+## How to play
+
+1. Setup the teamserver and start a http lisenter, the teamserver will generate the file `.cobaltstrike.beacon_keys`.
+2. Compile beacontoo with Jetbrains Idea, use command `java -jar BeaconTool.jar ` to convert java keystore to PEM format.
+3. Replace the RSA key pair in the file `cmd/config/config.go` (the RSA private key is not required, I wrote it in the code just for the record)
+4. Compile geacon for what platform you want to run, use command `export GOOS="darwin" && export GOARCH="amd64" && go build cmd/main.go`
+5. Having fun ! PR and issue is welcome ;)
+6. Geacon has just been tested on CobaltStrike 3.14 and only support default c2profile, so many hardcode in the project and I will not try to implement more C2profile support at this moment.
+
+
+
+## Protocol analysis
+
+To be continued, I will update as soon as I have time ...
+