Windows Mitigations & Bypass

Defeating both exploit mitigations (ASLR/DEP/CFG/XFG/CET/ACG) and platform security controls (WDAC, ASR, AMSI/ETW, PPL/LSA Protection, VBS/HVCI). Every technique is paired with detection + OPSEC so it doubles as defensive hardening guidance. Assumes an authorized engagement.

When to Activate

• Fingerprinting a target's mitigation landscape before weaponizing an exploit
• Designing a memory-corruption exploit that must defeat ASLR + DEP + CFG/CET in one chain
• Bypassing application control (WDAC / App Control for Business) to run unsigned code
• Disabling or blinding telemetry (ASR, AMSI, ETW) ahead of post-exploitation
• Dumping a PPL/LSA-protected process (LSASS) or killing a PPL-protected EDR
• Deciding between userland-only vs BYOVD/kernel approaches based on VBS/HVCI state

Technique Map

Quick Start

# 1. Fingerprint system + per-process mitigations, AMSI/ETW/ASR/WDAC/VBS state
powershell -ep bypass -f scripts/mitigation_recon.ps1 -OutJson recon.json
powershell -ep bypass -f scripts/Get-ProcessMitigationMap.ps1   # rank weak processes

# 2. If memory-corruption target: locate non-ASLR modules + CFG-valid dispatch gadgets
python scripts/find_nonaslr_modules.py C:\Target\*.dll
python scripts/cfg_dispatch_gadget_finder.py target.dll        # ROP/JOP under CFG/CET

# 3. If application control (WDAC) blocks execution: pick a signed bypass vessel
#    MSBuild inline C#, signed legacy Teams (Electron), or signed Node .node module

# 4. Blind telemetry before post-ex (use sparingly — patching is itself an IOC)
#    AMSI: patch AmsiScanBuffer / amsiInitFailed   ETW: patch EtwEventWrite

# 5. Credential access vs PPL/LSA: userland PPLmedic chain (no driver) or BYOVD
python scripts/extract_asr_exclusions.py                         # find ASR-excluded paths
python scripts/check_driver_blocklist.py mydriver.sys           # is driver blocklisted/HVCI-safe?

OPSEC & Detection (summary)

Deep Dives

• references/memory-safety-mitigations.md — ASLR/HEASLR, DEP/NX, CFG/XFG, Intel CET shadow stack + IBT, SEHOP: how each works on Win11 24H2 and concrete bypass chains (info leak → dispatch gadget → VirtualProtect).
• references/acg-cig-dynamic-code.md — Arbitrary Code Guard, Code Integrity Guard, Dynamic Code policy: signed-code-only reuse, JIT/browser exemptions, cross-process pivots, SEC_IMAGE section abuse.
• references/wdac-app-control-bypass.md — WDAC / App Control for Business: recommended-block-rule LOLBins, signed Electron (Loki C2) + signed Node .node/V8 exploitation, DLL sideloading, allow-list reality check.
• references/asr-amsi-etw-blinding.md — ASR rule bypasses (global exclusion abuse, process hollowing into trusted images), AMSI bypass variants, ETW blinding (full patch vs selective provider disable).
• references/ppl-lsa-protection.md — PPL levels & LSA Protection (RunAsPPL), userland PPLmedic exploit chain, PPLBlade/nanodump dumping, Credential Guard reality, BYOVD PPL kill.
• references/byovd-vbs-hvci.md — BYOVD kernel R/W primitive build, Microsoft driver blocklist + LOLDrivers + HVCI/Secure Boot evasion (Silver Fox amsdk.sys case), VBS/Credential Guard limits, kernel shadow stack.