AxHunter

PoCs for Wellbia XIGNCODE3 anti-cheat xhunter driver family — xhunter1.sys v2023.12.7.78 and xhunter2.sys v2026.6.1.192 (CVE-2026-15430).

Workspace layout

Cargo workspace, three crates:

AxHunter/
├── Cargo.toml               workspace manifest
├── axhunter-lsa/            shared crate — driver-agnostic LSA extraction (MemReader trait,
│                              LDR walk, BCrypt 3DES key extraction, LogonSessionList,
│                              WDigest). Consumed by both PoCs.
├── axhunter_v1/             xhunter1.sys v2023.12.7.78  (no CVE assigned)
└── axhunter_v2/             xhunter2.sys v2026.6.1.192  (CVE-2026-15430)

Each PoC crate carries its own target driver binary (xhunter1.sys, xhunter2.sys) and — in axhunter_v2/src/ — Wellbia's WBMF module (wbmf_module.dll) extracted from a live WindSlayer.exe process.

Build

From the workspace root:

cargo build --release              # builds both binaries + shared crate
cargo build --release -p AxHunter_v1
cargo build --release -p AxHunter_v2

Both binaries land in target/release/:

target/release/AxHunter_v1.exe
target/release/AxHunter_v2.exe

Unified CLI

Both binaries share the same flags:

AxHunter_v1.exe -m {dump|kill|lpe|all} [-t <pid|image>] [-d <device>]
AxHunter_v2.exe -m {dump|kill|lpe|all} [-t <pid|image>] [-d <device>]

See each crate's README for driver-specific defaults and mode details.

Companion write-ups

• Hunting the Hunter — xhunter1.sys v2023.12.7.78. Corresponds to axhunter_v1/.
• Hunting the Hunter II — xhunter2.sys v2026.6.1.192. Corresponds to axhunter_v2/.

Comparison

Property	xhunter1.sys v2023.12.7.78	xhunter2.sys v2026.6.1.192
CVE	none	CVE-2026-15430
Transport	IRP_MJ_WRITE, 624-byte plaintext frame	IRP_MJ_WRITE, 1184-byte LCG-XOR-encrypted frame
Frame magic	0x345821AB	0x70506202 (MAGIC ^ SEED_KEY)
Device open auth	None	WBMF RSA-2048 signed PE + Win32StartAddress in-PE
Per-request auth	None	WBCC blob + certificate chain iterator
PID gate escalation	cmd 777 + cmd 775	cmd 777 + cmd 779 + cmd 775
cmd 785 (PPL handle mint)	ObOpenObjectByPointer(KernelMode)	identical
cmd 787 (cross-process read)	KeStackAttachProcess byte copy	identical
cmd 800 (handle stomp kill)	KeStackAttachProcess + ObSetHandleAttributes(KernelMode) + ZwClose	identical

Sibling reference

• CVE-2026-3609 — legacy xhunter1.sys v10.0.10011.16384 (write-up, PoC at CredsHunter).

License

MIT. See LICENSE.