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#![allow(non_camel_case_types)] #![allow(non_snake_case)] #![allow(overflowing_literals)] #![allow(non_upper_case_globals)] pub mod error; pub mod peloader; pub mod peparser; use error::Result; use peloader::{DllLoader, ExeLoader}; use peparser::PE; use std::os::raw::c_void; #[cfg(feature = "hook")] pub use peloader::hook; #[cfg(feature = "hook")] use peloader::hook::ProcDesc; #[cfg(feature = "hook")] use std::collections::HashMap; pub unsafe fn memexec_exe(bs: &[u8]) -> Result<()> { let pe = PE::new(bs)?; #[cfg(feature = "hook")] let loader = ExeLoader::new(&pe, None)?; #[cfg(not(feature = "hook"))] let loader = ExeLoader::new(&pe)?; Ok(loader.invoke_entry_point()) } #[cfg(feature = "hook")] pub unsafe fn memexec_exe_with_hooks( bs: &[u8], hooks: &HashMap<ProcDesc, *const c_void>, ) -> Result<()> { let pe = PE::new(bs)?; let loader = ExeLoader::new(&pe, Some(hooks))?; Ok(loader.invoke_entry_point()) } pub unsafe fn memexec_dll( bs: &[u8], hmod: *const c_void, reason_for_call: u32, lp_reserved: *const c_void, ) -> Result<bool> { let pe = PE::new(bs)?; #[cfg(feature = "hook")] let loader = DllLoader::new(&pe, None)?; #[cfg(not(feature = "hook"))] let loader = DllLoader::new(&pe)?; Ok(loader.invoke_entry_point(hmod, reason_for_call, lp_reserved)) } #[cfg(feature = "hook")] pub unsafe fn memexec_dll_with_hooks( bs: &[u8], hmod: *const c_void, reason_for_call: u32, lp_reserved: *const c_void, hooks: &HashMap<ProcDesc, *const c_void>, ) -> Result<bool> { let pe = PE::new(bs)?; let loader = DllLoader::new(&pe, Some(hooks))?; Ok(loader.invoke_entry_point(hmod, reason_for_call, lp_reserved)) } #[cfg(test)] mod tests { use super::*; use std::fs::File; use std::io::Read; #[test] #[cfg(not(feature = "hook"))] fn test_dll() { let mut buf = Vec::new(); #[cfg(all(target_arch = "x86_64", target_os = "windows"))] File::open("./test.x64.dll") .unwrap() .read_to_end(&mut buf) .unwrap(); #[cfg(all(target_arch = "x86", target_os = "windows"))] File::open("./test.x86.dll") .unwrap() .read_to_end(&mut buf) .unwrap(); unsafe { memexec_dll(&buf, 0 as _, peloader::def::DLL_PROCESS_ATTACH, 0 as _).unwrap(); } } #[test] #[cfg(not(feature = "hook"))] fn test_exe() { let mut buf = Vec::new(); #[cfg(all(target_arch = "x86_64", target_os = "windows"))] File::open("./test.x64.exe") .unwrap() .read_to_end(&mut buf) .unwrap(); #[cfg(all(target_arch = "x86", target_os = "windows"))] File::open("./test.x86.exe") .unwrap() .read_to_end(&mut buf) .unwrap(); unsafe { memexec_exe(&buf).unwrap(); } } #[cfg(feature = "hook")] use std::mem; #[cfg(feature = "hook")] #[cfg(all(target_arch = "x86", target_os = "windows"))] extern "cdecl" fn __wgetmainargs( _Argc: *mut i32, _Argv: *mut *const *const u16, _Env: *const c_void, _DoWildCard: i32, _StartInfo: *const c_void, ) -> i32 { unsafe { *_Argc = 2; let a0: Vec<_> = "program_name\0" .chars() .map(|c| (c as u16).to_le()) .collect(); let a1: Vec<_> = "token::whoami\0" .chars() .map(|c| (c as u16).to_le()) .collect(); *_Argv = [a0.as_ptr(), a1.as_ptr()].as_ptr(); mem::forget(a0); mem::forget(a1); } 0 } #[test] #[cfg(feature = "hook")] #[cfg(all(target_arch = "x86", target_os = "windows"))] fn hook_x86() { let mut buf = Vec::new(); File::open("./test.x86.exe") .unwrap() .read_to_end(&mut buf) .unwrap(); let mut hooks = HashMap::new(); unsafe { hooks.insert( "msvcrt.dll!__wgetmainargs".into(), mem::transmute::< extern "cdecl" fn( *mut i32, *mut *const *const u16, *const c_void, i32, *const c_void, ) -> i32, *const c_void, >(__wgetmainargs), ); memexec_exe_with_hooks(&buf, &hooks).unwrap(); } } #[cfg(feature = "hook")] #[cfg(all(target_arch = "x86_64", target_os = "windows"))] extern "win64" fn __wgetmainargs( _Argc: *mut i32, _Argv: *mut *const *const u16, _Env: *const c_void, _DoWildCard: i32, _StartInfo: *const c_void, ) -> i32 { unsafe { *_Argc = 2; let a0: Vec<_> = "program_name\0" .chars() .map(|c| (c as u16).to_le()) .collect(); let a1: Vec<_> = "token::whoami\0" .chars() .map(|c| (c as u16).to_le()) .collect(); *_Argv = [a0.as_ptr(), a1.as_ptr()].as_ptr(); mem::forget(a0); mem::forget(a1); } 0 } #[test] #[cfg(feature = "hook")] #[cfg(all(target_arch = "x86_64", target_os = "windows"))] fn hook_x64() { let mut buf = Vec::new(); File::open("./test.x64.exe") .unwrap() .read_to_end(&mut buf) .unwrap(); let mut hooks = HashMap::new(); unsafe { hooks.insert( "msvcrt.dll!__wgetmainargs".into(), mem::transmute::< extern "win64" fn( *mut i32, *mut *const *const u16, *const c_void, i32, *const c_void, ) -> i32, *const c_void, >(__wgetmainargs), ); memexec_exe_with_hooks(&buf, &hooks).unwrap(); } } }