本文へ移動
cccskills
無料GitHub で公開

bypassing-anti-vm-and-sandbox-checks

Bypasses anti-VM and sandbox checks during analysis by locating the specific detection routines (artifact strings, timing, CPUID/hypervisor bit) and planning patches or environment hardening so the sample detonates. Activates for requests to bypass anti-VM checks, defeat sandbox detection, or make an evasive sample run for analysis.

インストール方法を見る

含まれるファイル(4)

  • SKILL.md2.9 KB
  • LICENSE340 B
  • references/api-reference.md1.2 KB
  • scripts/analyst.py2.5 KB

SKILL.md(原文)

インストールする前に、エージェントに与えられる指示の中身を確認できます。

Bypassing Anti-VM and Sandbox Checks

When to Use

  • An evasive sample refuses to detonate under analysis and you need to locate and neutralize its anti-VM/sandbox checks (artifact strings, timing stalls, CPUID hypervisor bit, MAC/registry checks).
  • You are planning patches or environment hardening to force execution.

Do not use patching as a shortcut that changes malicious logic — patch only the evasion gate. Run only in an isolated, instrumented VM with snapshots.

Prerequisites

  • The sample and a debugger/disassembler on an isolated VM.

Safety & Handling

  • The sample executes during bypass work; use a disposable, snapshotted, network-controlled VM.

Workflow

Step 1: Locate the evasion checks

python scripts/analyst.py locate sample.bin

Reports offsets of anti-VM artifact strings, timing APIs (GetTickCount, rdtsc), CPUID usage, and environment-fingerprint APIs to point you at the detection routines.

Step 2: Plan the bypass

For each check decide the approach: patch the conditional jump after the check, hook/stub the API to return benign values, or harden the VM (rename adapters, patch registry, add fake processes).

Step 3: Apply and verify

Patch the gate (e.g., force the "not detected" branch) and confirm the sample proceeds past the check.

Step 4: Document

Record each check, its offset, and the bypass applied for reproducibility.

Validation

  • Each located check maps to a real detection primitive (string/timing/CPUID/API).
  • The patched/hooked gate provably lets execution continue.
  • Only the evasion gate is altered, not the payload logic.

Pitfalls

  • Multiple layered checks — bypassing one is not enough.
  • Timing checks needing instruction-accurate handling (rdtsc deltas).
  • Anti-tamper detecting the patch; prefer hooking returns over byte patches when fragile.

References

レビュー

まだレビューはありません。使ってみた感想をお寄せください。

同じリポジトリのスキル

概要と使いどころ

Reverses Android malware: unpacking APKs, decompiling DEX bytecode to readable Java, auditing the manifest for abused permissions and components, and locating dynamically loaded or native payloads. Activates for requests to analyze an APK, decompile DEX, or investigate a suspicious Android app.

日本語の概要は準備中です。原文の説明を表示しています。

meltedinhex/analyst-ai-pack222026年7月7日 更新

Analyzes API call traces from a sandbox or API monitor (JSON) to group calls by category, reconstruct high-level behaviors (process injection, file drops, network, crypto), and flag suspicious call sequences. Activates for requests to analyze an API trace, interpret sandbox API logs, or identify behavior from Win32/Native API calls.

日本語の概要は準備中です。原文の説明を表示しています。

meltedinhex/analyst-ai-pack222026年7月7日 更新

Analyzes Windows Authenticode signatures on PE files: checking for a signature, reading the signer certificate chain, detecting revoked/expired/stolen certs, and recognizing signature-stripping and catalog-signing abuse. Activates for requests to analyze a code signature, verify Authenticode, or assess signer trust on a PE.

日本語の概要は準備中です。原文の説明を表示しています。

meltedinhex/analyst-ai-pack222026年7月7日 更新

Analyzes banking trojan webinject configurations to extract targeted institutions, injected JavaScript/HTML, and data-theft hooks, mapping the fraud workflow. Activates for requests to analyze banking trojan webinjects, parse a webinject config, or map targeted banks and credential-theft injections.

日本語の概要は準備中です。原文の説明を表示しています。

meltedinhex/analyst-ai-pack222026年7月7日 更新

Analyzes Python-based malware packaged as PyInstaller/py2exe executables by detecting the packer, locating the embedded archive, and identifying bundled .pyc modules for extraction and decompilation. Activates for requests to analyze compiled Python malware, unpack a PyInstaller binary, or extract pyc modules from a frozen Python executable.

日本語の概要は準備中です。原文の説明を表示しています。

meltedinhex/analyst-ai-pack222026年7月7日 更新

Analyzes cryptojacking/coinminer malware by extracting mining pool endpoints (stratum), wallet addresses, algorithm and miner identifiers (XMRig and forks), and persistence or resource-control settings from static strings and config. Activates for requests to analyze a cryptominer, extract mining pool and wallet IOCs, or identify coinminer configuration.

日本語の概要は準備中です。原文の説明を表示しています。

meltedinhex/analyst-ai-pack222026年7月7日 更新

meltedinhex のスキルをすべて見る

このスキルの問題を報告する