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yaklang/técnicas-anti-debugging

Manual de detecção e bypass de técnicas anti-debugging. Use ao reverter binários protegidos que detectam depuradores via ptrace, flags PEB, verificações de temporização ou manipuladores de sinais/exceções no Linux e Windows.

O que é técnicas-anti-debugging?

Este skill fornece um playbook completo para identificação e bypass de técnicas anti-debugging comumente encontradas em binários protegidos, tanto no Linux quanto no Windows. Ele é útil para engenheiros reversos e analistas de segurança que precisam depurar ou inspecionar executáveis que utilizam métodos como verificação de ptrace, flags da estrutura PEB (Process Environment Block) no Windows, medições de tempo para detectar atrasos causados por depuradores, e manipuladores de sinais (Linux) ou exceções (Windows) para dificultar a análise. O skill suporta múltiplas plataformas e fornece instruções detalhadas sobre como cada técnica funciona, como identificá-la durante a análise estática/dinâmica, e as estratégias de bypass correspondentes (ex: patching de instruções, hooks, alteração de registradores, ou uso de ferramentas como `antidebug` e `x64dbg`). Com esse recurso, o agente pode gerar código (em linguagens como Python, C, ou Assembly) para testar e contornar as proteções, além de recomendar ferramentas específicas e configurações de ambiente para evitar a detecção.

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npx skills add https://github.com/yaklang/hack-skills/tree/main/skills/anti-debugging-techniques

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Documentação

O que técnicas-anti-debugging faz?

Manual de detecção e bypass de técnicas anti-debugging. Use ao reverter binários protegidos que detectam depuradores via ptrace, flags PEB, verificações de temporização ou manipuladores de sinais/exceções no Linux e Windows.

Visão Geral

Técnicas anti-debugging são usadas por malware e binários protegidos para dificultar a engenharia reversa. Este playbook descreve as técnicas mais comuns, como identificá-las e como contorná-las.

Técnicas Suportadas

Linux

  • ptrace(): Verifica se um depurador está anexado ao processo.
  • Verificações de temporização: Usam gettimeofday() ou rdtsc para detectar atrasos causados por depuradores.
  • Manipuladores de sinais: Configuram handlers para sinais como SIGTRAP para detectar breakpoints.

Windows

  • PEB (Process Environment Block): Verifica flags como BeingDebugged ou NtGlobalFlag.
  • API NtQueryInformationProcess: Usa a função nativa para detectar depuradores.
  • Verificações de temporização: Similar ao Linux, usando QueryPerformanceCounter().
  • Manipuladores de exceções: Configuram handlers de exceção estruturada (SEH) para detectar depuração.

Estratégias de Bypass

  1. Patching de instruções: Modifique o bytecode para pular as verificações.
  2. Hooks: Intercepte chamadas de API e retorne valores falsos.
  3. Alteração de registradores: Modifique registradores como EAX/RAX após verificações.
  4. Ferramentas recomendadas:
    • Linux: gdb com scripts Python, antidebug.
    • Windows: x64dbg com plug-ins como ScyllaHide, WinDbg.

Exemplo de Uso

# Exemplo de bypass de ptrace no Linux
import ctypes
libc = ctypes.CDLL("libc.so.6")
PTRACE_TRACEME = 0
# Força ptrace a retornar 0 (sucesso)
libc.ptrace(PTRACE_TRACEME, 0, 0, 0)

Referências

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

yaklang/401-403-bypass-techniques

401/403 bypass playbook. Use when encountering access-denied responses on admin panels, API endpoints, or restricted paths. Covers path manipulation, HTTP method tampering, header injection, protocol downgrade, and automated bypass tools.

yaklang/active-directory-acl-abuse

Active Directory ACL abuse playbook. Use when exploiting misconfigured AD permissions including GenericAll, WriteDACL, DCSync rights, shadow credentials, LAPS reading, GPO abuse, and BloodHound-guided attack paths.

yaklang/active-directory-certificate-services

AD Certificate Services attack playbook. Use when targeting misconfigured AD CS for privilege escalation via ESC1-ESC13 template abuse, NTLM relay to enrollment, CA officer abuse, and certificate-based persistence.

yaklang/active-directory-kerberos-attacks

Kerberos attack playbook for Active Directory. Use when targeting AD authentication via AS-REP roasting, Kerberoasting, golden/silver/diamond tickets, delegation abuse, or pass-the-ticket attacks.

yaklang/ai-ml-security

AI/ML security playbook. Use when assessing model supply chain attacks (pickle RCE, poisoned weights), adversarial examples, model poisoning, model stealing, data privacy attacks (membership inference, model inversion), and autonomous agent security risks.

yaklang/android-pentesting-tricks

Android pentesting playbook. Use when testing Android applications for SSL pinning bypass, exported component abuse, WebView vulnerabilities, intent redirection, root detection bypass, tapjacking, and backup extraction during authorized mobile security assessments.

yaklang/api-auth-and-jwt-abuse

API authentication and JWT abuse playbook. Use when testing bearer tokens, API keys, claim trust, header spoofing, rate limits, and API auth boundary weaknesses.

yaklang/api-authorization-and-bola

API authorization and BOLA testing playbook. Use when APIs expose object identifiers, nested resources, hidden writable fields, or weak function-level authorization.

yaklang/api-recon-and-docs

API reconnaissance and documentation review playbook. Use when discovering endpoints, schemas, versions, OpenAPI specs, hidden docs, and surface area for API testing.

yaklang/api-sec

Entry P1 category router for API security. Use when choosing between API recon, authorization, token abuse, and hidden-parameter workflows before any deeper API topic skill.

yaklang/arbitrary-write-to-rce

Arbitrary write to RCE playbook. Use when you have an arbitrary write primitive (from heap exploitation, format string, or OOB write) and need to convert it into code execution by targeting GOT, hooks, _IO_FILE vtable, exit_funcs, TLS_dtor_list, modprobe_path, .fini_array, or C++ vtables.

yaklang/authbypass-authentication-flaws

Authentication bypass testing playbook. Use when assessing login flows, password reset logic, account recovery, MFA bypass, token predictability, brute-force resistance, and session boundary flaws.

yaklang/auth-sec

Entry P1 category router for authentication and authorization. Use when testing login flows, sessions, object authorization, JWT, OAuth, CORS, CSRF, and enterprise SSO weaknesses before any deeper auth topic skill.

yaklang/binary-protection-bypass

Binary protection bypass playbook. Use when identifying and bypassing ASLR, PIE, NX/DEP, stack canary, RELRO, FORTIFY_SOURCE, CET, and MTE protections in ELF binaries to enable exploitation.

yaklang/browser-exploitation-v8

Browser and V8 exploitation playbook. Use when exploiting JavaScript engine vulnerabilities including JIT type confusion, incorrect bounds elimination, and V8 sandbox bypass to achieve renderer RCE and sandbox escape in Chrome/Chromium.

yaklang/business-logic-vuln

Entry P1 category router for business logic testing. Use when workflow abuse, race conditions, pricing flaws, or multi-step state attacks matter more than parser-level input injection.

yaklang/business-logic-vulnerabilities

Business logic vulnerability playbook. Use when reasoning about workflows, race conditions, price manipulation, coupon abuse, state machines, and multi-step authorization gaps.

yaklang/classical-cipher-analysis

Classical cipher analysis playbook. Use when encountering substitution ciphers, Vigenere, transposition, XOR, or encoded text in CTF challenges that requires frequency analysis, Kasiski examination, or known-plaintext cryptanalysis.

yaklang/clickjacking

Clickjacking playbook. Use when testing whether target pages can be framed, whether X-Frame-Options or CSP frame-ancestors are properly configured, and whether UI redress attacks can trigger sensitive actions.

yaklang/cmdi-command-injection

Command injection playbook. Use when user input may reach shell commands, process execution, converters, import pipelines, or blind out-of-band command sinks.

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