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Add beacon generation functions for CobaltStrike's cross-platform beacon. Currently only supported on Linux & MacOS.

Restricted description:

• Linux: For particularly old systems, you can choose "Linux-GLIBC" option in cna (around 2010)
• MacOS: Latest systems only support 64-bit programs
• iOS: sandbox, restricted cmd
• Embedded: only *nix
• ⍻ : Loader is still in progress

Download:

• CrossC2.cna
• genCrossC2 CS Env

1. copy CrossC2.cna and genCrossC2 file to CobaltStrike's rootdir (Must be in the same directory )
2. choose Script Manager，add CrossC2.cna (If successfully installed, the menu bar will have an additional item CrossC2)
3. Modify the genCrossC2 path in the CrossC2.cna script to the real path

exec("/xxx/xxx/genCrossC2"... -> exec("/opt/cs/genCrossC2"...

For some reasons, only HTTPS beacon is currently supported. C2Profile dynamic analysis will be supported in the future

Copy .cobaltstrike.beacon_keys from the cs directory on the server to the local cs directory.

Menu bar: CrossC2 -> CrossC2 Payload Generator -> genCrossC2

Can be configured in the pop-up dialog:
1. Operating System
2. Arach
3. Payload Type(Currently only supports Stageless, Staged is being updated)
4. Generate file save path

In addition to cna GUI generation, you can also directly call the underlying program to generate directly.

[usage]: genCrossC2 [host] [port] [getURI] [postURI] [platform] [arch] [outputFileName]


-platform		'MacOS' / 'Linux'
-arch    		'x86' / 'x64'

[ex]:
	genCrossC2 127.0.0.1 4444 null null MacOS x64 ./CrossC2-test

1. Rich C2Profile support
2. Staged Type Shellcode Generation
3. http-proxy (auth) & socks proxy back connection support
4. Proxy-Pivots
5. node beacon? (Single node type, can host other beacon without relying on teamserver)

• Support Linux & MacOS beacon generation.

md5(genCrossC2.Linux) = f4c0cc85c7cdd096d2b7febedc037538

md5(genCrossC2.MacOS) = 79fff0505092fc2055824ed1289ce8f9

• -fix genCrossC2.Linux crash.
• -fix uploading large file error.
• +support GUI file manager.

md5(genCrossC2.Linux) = 8256374d88c2149efc102aff7e90b3f9

md5(genCrossC2.MacOS) = 08fce0a5d964a091d8bf2344d7ab809e

• +support Compatibility with older versions of GLIBC on older systems Linux (around 2010).

• -change Multi-threaded background when shell commands are executed
• -change Redirect error output to standard output when shell command is executed.
• +support Add background file download function.

md5(genCrossC2.Linux) = b2e34f721ec2543b6625e33c8c2935df

md5(genCrossC2.MacOS) = 4e38a9d9a3eeff309648afc02e2e7664