CVE-2025-60709/
├── CVE-2025-60709.c    (5.3 KB, 157 linhas) — Exploit C original
├── CVE-2025-60709.go   (9.2 KB, 285 linhas) — Port Go (demo educativa)
└── README.txt          (4.2 KB, 132 linhas) — Documentação original

┌─────────────────────────────────────────────────────────────┐
│                    CVE-2025-60709 LPE                       │
└─────────────────────────────────────────────────────────────┘

[1] EVASÃO DE DEFESAS
    ├─ KillETW()   → Aplica patch no EtwEventWrite na ntdll com RET (0xC3)
    └─ KillAMSI()  → Aplica patch no AmsiScanBuffer na amsi.dll com RET (0xC3)

[2] HEAP GROOMING (preparação de memória)
    └─ GroomLookaside()
       ├─ Cria 4096 arquivos: C:\Windows\Temp\groom_00000.blf
       ├─ Chama CreateLogFile() + AddLogContainer() para cada um
       └─ Esgota lookaside lists → garante layout de heap previsível

[3] PRIMITIVA DE ESCRITA ARBITRÁRIA — ClfsArbWrite(Address, Value)
    ├─ Constrói buffer CLFS malformado (0x102010 bytes)
    │    ├─ Assinatura CLFS válida em +0x00: 0x0201
    │    ├─ Sector size shift em +0x14: 2
    │    ├─ First client region em +0x28: 0x100
    │    ├─ cbRecord SUPERDIMENSIONADO em +0x100: 0xFF00 (64 KB > dados reais)
    │    ├─ Marcador shadow zone em +0x9A8: 0x13371337
    │    └─ CClfsContainerContext falso no offset (0xFF00 + 0x100):
    │         ├─ pContainer = TargetAddress - 0x10
    │         └─ cbContainer = Value (dado a escrever)
    ├─ Calcula checksum CLFS correto (driver valida)
    ├─ Escreve contêiner malformado → C:\Windows\Temp\evil.blf
    ├─ Cria log apontando para evil.blf
    ├─ Chama ClfsReadRestartArea() → dispara análise no kernel
    └─ Driver estoura buffer → escreve Value em Address ✓

[4] ROUBO DE TOKEN SYSTEM
    ├─ Lê EPROCESS do processo SYSTEM via PsInitialSystemProcess
    └─ Extrai token em EPROCESS + EPROCESS_TOKEN (offset 0x4c0)

[5] ESCALAÇÃO DE PRIVILÉGIOS
    └─ ClfsArbWrite(CurrentEprocess + 0x4c0, SystemToken)
       └─ Sobrescreve token do processo atual com token SYSTEM ✓

[6] EXECUÇÃO DE PAYLOAD C2
    ├─ VirtualAlloc(PAGE_EXECUTE_READWRITE)
    ├─ Copia shellcode beacon de 1789 bytes
    ├─ CreateThread() → execução como NT AUTHORITY\SYSTEM
    └─ Beacon C2: IPv6 + DoH → fallback Gmail drafts
       └─ sRDI + sleep obfuscation + ETW/AMSI já corrigidos

[7] PERSISTÊNCIA
    └─ Sleep(INFINITE) → processo mantém token SYSTEM

Contêiner CLFS legítimo:
  [Header 0x100 bytes][Record: cbRecord bytes de dados reais]

Contêiner malformado (evil.blf):
  [Header válido][cbRecord=0xFF00 → kernel lê 65.280 bytes]
                          ↓
  Kernel overflow → alcança CClfsContainerContext falso
                          ↓
  pContainer  = TargetKernelAddress - 0x10
  cbContainer = ValueToWrite
                          ↓
  Driver usa estrutura falsa → escreve ValueToWrite em TargetKernelAddress

cl /O1 /MT /link ntdll.lib advapi32.lib clfsw32.lib CVE-2025-60709.c

go build -ldflags="-s -w" -o CVE-2025-60709.exe CVE-2025-60709.go

rule CVE_2025_60709_CLFS_LPE {
    meta:
        description = "Detects CVE-2025-60709 CLFS LPE exploit"
        author      = "KONDORDEVSECURITYCORP"
        date        = "2026-03"
        cve         = "CVE-2025-60709"
        severity    = "critical"

    strings:
        $clfs_sig   = { 01 02 00 00 }
        $magic      = { 37 13 37 13 }
        $evil_file  = "evil.blf" ascii wide
        $groom_file = "groom_" ascii wide
        $etw_func   = "EtwEventWrite" ascii wide
        $amsi_func  = "AmsiScanBuffer" ascii wide
        $token_off  = { C0 04 00 00 }       // EPROCESS_TOKEN = 0x4C0

    condition:
        3 of them
}

ARQUIVO:  Criação massiva de *.blf em C:\Windows\Temp\ (> 100 em segundos)
ARQUIVO:  Criação de C:\Windows\Temp\evil.blf
PROCESSO: Processo em modo REALTIME_PRIORITY + chamadas a ClfsReadRestartArea
MEMÓRIA:  Escrita em PAGE_EXECUTE_READWRITE + CreateThread imediato
API:      VirtualProtect sobre EtwEventWrite ou AmsiScanBuffer
KERNEL:   Acesso a PsInitialSystemProcess a partir do user-mode

# Verificar arquivos de grooming
Get-ChildItem C:\Windows\Temp -Filter "groom_*.blf" | Measure-Object

# Verificar arquivo exploit
Test-Path C:\Windows\Temp\evil.blf

# Verificar integridade do ntdll (patch ETW)
Get-AuthenticodeSignature (Get-Process -Name notepad | Select -First 1).Path

[1] DEFENSE EVASION
    ├─ KillETW()   → Patch EtwEventWrite in ntdll with RET (0xC3)
    └─ KillAMSI()  → Patch AmsiScanBuffer in amsi.dll with RET (0xC3)

[2] HEAP GROOMING
    └─ GroomLookaside()
       ├─ Creates 4096 files: C:\Windows\Temp\groom_00000.blf
       ├─ Calls CreateLogFile() + AddLogContainer() for each
       └─ Exhausts lookaside lists → guarantees predictable heap layout

[3] ARBITRARY WRITE PRIMITIVE — ClfsArbWrite(Address, Value)
    ├─ Constructs malformed CLFS buffer (0x102010 bytes)
    │    ├─ Valid CLFS signature at +0x00: 0x0201
    │    ├─ Oversized cbRecord at +0x100: 0xFF00 (65,280 bytes)
    │    ├─ Shadow zone marker at +0x9A8: 0x13371337
    │    └─ Fake CClfsContainerContext at offset (0xFF00 + 0x100):
    │         ├─ pContainer  = TargetAddress - 0x10
    │         └─ cbContainer = Value (data to write)
    ├─ Computes valid CLFS checksum (driver validates)
    ├─ Writes malformed container → C:\Windows\Temp\evil.blf
    ├─ Creates log pointing to evil.blf
    ├─ Calls ClfsReadRestartArea() → triggers kernel parsing
    └─ Driver overflows buffer → writes Value to Address ✓

[4] SYSTEM TOKEN THEFT
    ├─ Reads SYSTEM process EPROCESS via PsInitialSystemProcess
    └─ Extracts token at EPROCESS + 0x4C0

[5] PRIVILEGE ESCALATION
    └─ ClfsArbWrite(CurrentEprocess + 0x4C0, SystemToken)
       └─ Overwrites current process token with SYSTEM token ✓

[6] C2 PAYLOAD EXECUTION
    ├─ VirtualAlloc(PAGE_EXECUTE_READWRITE)
    ├─ Copy 1789-byte shellcode beacon
    ├─ CreateThread() → runs as NT AUTHORITY\SYSTEM
    └─ Beacon: IPv6 + DoH C2 → Gmail drafts fallback
       └─ sRDI + sleep obfuscation + ETW/AMSI already patched

[7] PERSISTENCE
    └─ Sleep(INFINITE) → process keeps SYSTEM token

Legitimate CLFS container:
  [0x100 byte Header][Record: cbRecord bytes of real data]

Malformed container (evil.blf):
  [Valid Header][cbRecord=0xFF00 → kernel reads 65,280 bytes]
                        ↓
  Kernel overflows → reaches fake CClfsContainerContext
                        ↓
  pContainer  = TargetKernelAddress - 0x10
  cbContainer = ValueToWrite
                        ↓
  Driver uses fake structure → writes ValueToWrite to TargetKernelAddress

cl /O1 /MT /link ntdll.lib advapi32.lib clfsw32.lib CVE-2025-60709.c

go build -ldflags="-s -w" -o CVE-2025-60709.exe CVE-2025-60709.go

rule CVE_2025_60709_CLFS_LPE {
    meta:
        description = "Detects CVE-2025-60709 CLFS LPE exploit"
        author      = "KONDORDEVSECURITYCORP"
        date        = "2026-03"
        cve         = "CVE-2025-60709"
        severity    = "critical"

    strings:
        $evil_file  = "evil.blf" ascii wide
        $groom_file = "groom_" ascii wide
        $etw_func   = "EtwEventWrite" ascii wide
        $amsi_func  = "AmsiScanBuffer" ascii wide
        $magic      = { 37 13 37 13 }
        $token_off  = { C0 04 00 00 }

    condition:
        3 of them
}

FILE:    Mass creation of *.blf in C:\Windows\Temp\ (> 100 in seconds)
FILE:    Creation of C:\Windows\Temp\evil.blf
PROCESS: REALTIME_PRIORITY process + ClfsReadRestartArea calls
MEMORY:  Write to PAGE_EXECUTE_READWRITE + immediate CreateThread
API:     VirtualProtect over EtwEventWrite or AmsiScanBuffer
KERNEL:  PsInitialSystemProcess access from user-mode

# Check grooming files
Get-ChildItem C:\Windows\Temp -Filter "groom_*.blf" | Measure-Object

# Check exploit file
Test-Path C:\Windows\Temp\evil.blf