---
name: pentest-malware-7f1706e6b132
description: Malware analizi — triage, static analiz, dynamic sandbox, IOC extract, YARA imza yazimi advisory. Triggers on malware analiz, malware triage, sandbox, Cuckoo, IDA, Ghidra, dynamic analysis, IOC, YARA imza, packer, unpacker, reverse malware.
license: MIT
compatibility: Works with Claude Code
allowed-tools: Read Write Edit Bash Grep
metadata:
  author: badi
  badi-version: ">=1.24.0"
  category: pentest
  scope: advisory
  inspired-by: 0xSteph/pentest-ai-agents malware-analyst
---

# pentest-malware

Malware analiz advisory — static, dynamic, IOC, YARA. Aktif analiz icin **izole sandbox** zorunlu (production'da yapilmaz).

## Triggers

- "malware analiz"
- "sample triage"
- "Cuckoo / VMRay sandbox"
- "IDA / Ghidra ile RE"
- "YARA imza yaz"
- "packer tespiti"
- "IOC extract"

## Triage Akisi

```
1. Hash hesapla (SHA256)
2. VirusTotal sorgu (offline detection mevcut mu)
3. Strings + magic byte
4. Packer detection (PEiD, DIE)
5. Static disassembly (Ghidra/IDA)
6. Dynamic sandbox (Cuckoo, Any.run)
7. Network IOC (C2 domain, IP, JA3)
8. YARA imza yaz
9. Report
```

## Hash + VT Lookup

```bash
# Hash
sha256sum sample.exe
md5sum sample.exe

# VT (API key gerekli, offline rapor)
curl -s "https://www.virustotal.com/api/v3/files/$(sha256sum sample.exe | cut -d' ' -f1)" \
  -H "x-apikey: $VT_KEY" | jq '.data.attributes'

# Onceki analiz hash uzerinden cikabilir -> dynamic kacir
```

## Static Analiz

```bash
# File type
file sample.exe
file sample.bin

# Strings (ASCII + UTF-16)
strings -a -el sample.exe | grep -iE 'http|cmd|powershell|exec|reg|task'
strings sample.exe | grep -iE '\.exe$|\.dll$|\.bat$'

# PE header (Windows)
pefile.py sample.exe              # imports, exports, sections
peframe sample.exe                # high-level summary
DIE / Detect It Easy              # packer/protector detect

# ELF (Linux)
readelf -a sample.elf
objdump -d sample.elf | head
```

## Packer Detect + Unpack

| Packer | Detect | Unpack |
|--------|--------|--------|
| UPX | DIE / `upx -l sample.exe` | `upx -d sample.exe` |
| ASPack | DIE | OllyScript / ESP trick |
| Themida | DIE (full match) | Manual / VMProtect unpacker |
| Custom | Unknown signature | Sandbox + memory dump |
| .NET obfuscation | dnSpy strings | de4dot, ConfuserEx unpacker |

## Dynamic Sandbox (Izole)

```bash
# Cuckoo (self-hosted)
cuckoo submit --machine win10-clean sample.exe
# Sonuc: behavior log, network capture, dropped files, registry changes

# REMnux (Linux analysis distro)
inetsim                          # fake internet (DNS, HTTP, SMTP)
oletools / olevba.py             # Office macro extract
```

## IDA / Ghidra Workflow

```
1. Open sample.exe
2. Auto-analysis (Ghidra: 5-10 dakika)
3. Entry point (WinMain / main / DllMain)
4. Strings'i sec -> cross-reference
5. Suspicious imports: VirtualAlloc, CreateRemoteThread, WinExec
6. C2 hardcoded -> search "http://" "https://"
7. XOR decryption loops -> mark + decode
8. Anti-debug check: IsDebuggerPresent, PEB.BeingDebugged
9. Anti-VM check: registry keys, MAC prefix, CPU count
10. Behavior chain: file dropper -> persistence -> C2
```

## YARA Imza Yazimi

```yara
rule Trickbot_Loader_v2 {
    meta:
        author = "Security Team"
        date = "2026-05-15"
        family = "Trickbot"
        description = "Trickbot loader version 2"
        reference = "https://malpedia.../trickbot"

    strings:
        $magic = { 4D 5A }                      // MZ header

        // Unique strings
        $s1 = "TrickBot" wide ascii
        $s2 = "GroupTag" wide
        $s3 = "ClientID" wide

        // Crypto routine signature
        $crypto = {
            8B 4D ?? 8B 55 ?? 33 D1 89 4D ??
            8B 55 ?? 81 EA 78 56 34 12
        }

        // C2 URL pattern
        $url = /https?:\/\/[a-z0-9]{8,16}\.(top|xyz|info)\/[a-z]{4,8}\.php/

    condition:
        $magic at 0
        and filesize < 500KB
        and (
            (2 of ($s*) and $crypto)
            or (1 of ($s*) and $url)
        )
}
```

## IOC Output Sablonu

```markdown
## Malware Analiz — sample_$(sha256).exe

### Triage
- SHA256: abc123def456...
- Family: Trickbot (v2)
- First seen: 2026-05-10 (VT)
- Detection rate: 23/72 AV

### Static
- PE, Win32, .NET (obfuscated with ConfuserEx)
- Packed: ConfuserEx -> de4dot ile unpack edildi
- Imports: VirtualAlloc, CreateRemoteThread, RegSetValueExA
- Strings: 5 URL, 3 user-agent, 2 service name

### Dynamic (sandbox)
- Dropper: %APPDATA%\Microsoft\<random>.exe
- Persistence: Registry Run + Scheduled Task
- C2: hxxps://malicious-domain[.]top/api.php
- Beacon: 60sn aralik, JA3 fingerprint cb02...

### IOC
| Type | Value |
|------|-------|
| SHA256 | abc123... |
| C2 Domain | malicious-domain.top |
| C2 IP | 203.0.113.45 |
| Mutex | Global\TrickBot_v2_1 |
| User-Agent | Mozilla/5.0 (compatible; MSIE 10.0; ...) |
| Reg Key | HKCU\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate |
```

## Out-of-Scope

- Production malware unleash (sandbox zorunlu)
- Reverse engineering 3. taraf legitimate yazilim (lisans ihlali)
- 0-day exploit gelistirme


---
Source attribution: badi
Original project: https://github.com/aibot88/sec_skill_store/blob/608120788167d56f99e31449e411e603ed250dc6/skills/claudskills/pentest-malware/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: badi
Original project: https://github.com/aibot88/sec_skill_store/blob/608120788167d56f99e31449e411e603ed250dc6/skills/claudskills/pentest-malware/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering, Data & Analytics
Roles: Security Engineer, Data Analyst, ML / AI Engineer
Specialties: Testing, API
Tools: Cuckoo, Ida, Ghidra
Country applicability: Country not specified
Classification basis: Source category, role and specialization labels
Instruction SHA-256: 587de467fd523f804e35cd35c54430d1454c096c2ab7fadac6bc2eae21e551fe