PTRACE-DO

Provides ability to use ptrace to execute functions in remote processes. Mostly for runtime shared library injection.

Support

Look at all these chickens targets

Relevant

Yaui (Yet another unix injector...)

https://github.com/ohchase/yaui

Example

Invoking Libc Getpid in a remote process

use libc::pid_t;
use proc_maps::MapRange;
use ptrace_do::{ProcessIdentifier, RawProcess, TracedProcess};

fn find_mod_map_fuzzy(mod_name: &str, process: &impl ProcessIdentifier) -> Option<MapRange> {
    use proc_maps::get_process_maps;
    let maps = get_process_maps(process.pid()).expect("alive");
    maps.into_iter().find(|m| match m.filename() {
        Some(p) => p.to_str().map(|s| s.contains(mod_name)).unwrap_or(false),
        None => false,
    })
}

pub fn find_remote_procedure(
    mod_name: &str,
    owned_process: &impl ProcessIdentifier,
    remote_process: &impl ProcessIdentifier,
    function_address: usize,
) -> Option<usize> {
    let internal_module = find_mod_map_fuzzy(mod_name, owned_process)?;
    tracing::info!(
        "Identifed internal range {mod_name:?} ({:?}) at {:X?}",
        internal_module.filename(),
        internal_module.start()
    );

    let remote_module = find_mod_map_fuzzy(mod_name, remote_process)?;
    tracing::info!(
        "Identifed remote range {mod_name:?} ({:?}) at {:X?}",
        remote_module.filename(),
        remote_module.start()
    );

    Some(function_address - internal_module.start() + remote_module.start())
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    tracing_subscriber::fmt().init();

    let target_pid: pid_t = 7777;
    let traced_process = TracedProcess::attach(RawProcess::new(target_pid))?;

    tracing::info!("Successfully attached to the process");
    let libc_path = "libc";
    let getpid_remote_procedure = find_remote_procedure(
        libc_path,
        &RawProcess::new(std::process::id() as pid_t),
        &traced_process,
        libc::getpid as usize,
    )
    .unwrap();
    tracing::info!("Found remote getpid procedure at : {getpid_remote_procedure:X?}");

    let frame = traced_process.next_frame()?;
    tracing::info!("Successfully waited for a frame");

    let (regs, _frame) = frame.invoke_remote(getpid_remote_procedure, 0, &[])?;
    tracing::info!("Successfully executed remote getpid");

    let traceed_pid = regs.return_value() as pid_t;
    tracing::info!("The return value (Traceed Pid) was {}", traceed_pid);

    Ok(())
}