Pentest Privesc

---
name: pentest-privesc
description: Privilege escalation methodology — Linux + Windows + container escape advisory. LinPEAS/WinPEAS analizi, SUID/capability abuse, kernel exploit secimi. Triggers on privesc, privilege escalation, LinPEAS, WinPEAS, SUID, capability, sudo abuse, kernel exploit, Windows token, UAC bypass.
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 privesc-advisor
---

# pentest-privesc

Linux + Windows + container privesc analiz. Kullanici LinPEAS/WinPEAS cikti paste eder; skill prioritize eder + exploit yolu onerir.

## Triggers

- "linpeas ciktisi"
- "winpeas ciktisi"
- "privesc nasil"
- "SUID binary"
- "sudo abuse"
- "kernel exploit secimi"
- "container escape"
- "UAC bypass"

## Linux Privesc Vector Listesi

| Vector | Tespit | Exploit Yontemi |
|--------|--------|-----------------|
| SUID binary | `find / -perm -4000` | GTFOBins lookup |
| Capability | `getcap -r /` 2>/dev/null | CAP_SETUID, CAP_DAC_READ_SEARCH |
| Sudo rule | `sudo -l` | GTFOBins (NOPASSWD bins) |
| Writable /etc/passwd | `ls -la /etc/passwd` | echo "evil:x:0:0..." >> |
| Writable cron | `find /etc/cron* -writable` | Script ekle |
| Path injection | sudo + relative path | PATH=/tmp:$PATH; ./binary |
| Kernel exploit | uname -a | exploit-db version match |
| LD_PRELOAD | sudo env_keep | malicious .so |
| Docker socket | /var/run/docker.sock readable | Container break |
| NFS no_root_squash | mount source | UID 0 file create |
| systemd timer writable | /etc/systemd/* | Timer override |
| Wildcard injection | tar/rsync wildcard | --checkpoint-action |

## LinPEAS Output Analizi

```bash
# Kullanici linpeas ciktisini paste eder, skill su sirayla okur:

1. SUID binary listesi -> GTFOBins'e gore exploitable filtre
2. Capability output -> CAP_SETUID / CAP_NET_ADMIN priorite
3. Sudo rule -> NOPASSWD + GTFOBins
4. Cron + writable -> script ekle yolu
5. PATH analiz -> writable yer var mi
6. Kernel version -> Dirty Pipe, OverlayFS, Sequoia gibi
```

GTFOBins hizli sablon: https://gtfobins.github.io — "shell", "sudo", "suid", "capabilities", "file write" filtreleri.

## Windows Privesc Vector

| Vector | Tespit | Exploit |
|--------|--------|---------|
| Unquoted service path | `wmic service get name,pathname` | Path'te bosluk + binplant |
| AlwaysInstallElevated | `reg query HKLM\Software\Policies\Microsoft\Windows\Installer` | MSI ile elevation |
| Token impersonation | `whoami /priv` | SeImpersonate / SeAssignPrimaryToken |
| Stored creds | `cmdkey /list`, `runas /savecred` | Saved cred kullan |
| Weak service ACL | `accesschk.exe -uwcqv "Authenticated Users" *` | Service modify |
| Registry autorun | HKLM\...\Run writable | Persistence + elevation |
| Scheduled task | `schtasks /query` | Task command override |
| DLL hijacking | Process Monitor | Missing DLL plant |
| Local admin via UAC bypass | UAC level Auto | fodhelper.exe, eventvwr.exe |
| Print Spooler | PrintNightmare CVE-2021-1675 | Lokal driver install |

## WinPEAS Output Analizi

WinPEAS renkli output -> kirmizi/sari onceliklendir. Skill kirmizi bulguya GENIS aciklama + sari bulguya konteks verir.

## Token Impersonation (Windows)

```
SeImpersonatePrivilege var mi?
  -> EVET: JuicyPotato (Win 10 < 1809), RoguePotato, PrintSpoofer (modern)
  -> Local SYSTEM kazanci

SeAssignPrimaryToken:
  -> CreateProcessAsUser ile SYSTEM yarat
```

## Kernel Exploit Secimi

```bash
# Linux
uname -r                            # version
cat /etc/os-release                 # distro
ldd $(which sh) | head -1           # libc

# Exploit-DB lookup (offline searchsploit)
searchsploit "Linux Kernel <version> Local"
searchsploit Sequoia                # CVE-2021-33909
searchsploit "Dirty Pipe"           # CVE-2022-0847
searchsploit PwnKit                 # CVE-2021-4034
```

```cmd
# Windows
systeminfo                          # version, hotfix
wmic qfe                            # patch list

# Windows-Exploit-Suggester (offline)
python wes.py systeminfo.txt
```

## Container Escape

```bash
# Pod RBAC check
kubectl auth can-i --list

# Privileged container detection
cat /proc/self/status | grep CapEff   # cap effective
ls /dev | grep -i sd                  # host disk mount
mount | grep /etc/hostname             # host mount izi

# Common escapes:
- privileged: true + mount host /
- hostPID: true + nsenter -t 1 ...
- Docker socket bind /var/run/docker.sock
- CAP_SYS_ADMIN + cgroups release_agent
- runc CVE-2024-21626 (leaking file descriptor)
```

## Output Sablonu

```markdown
## Privesc Path — <hedef>

### Tespit
- Linux Ubuntu 22.04.3 LTS, kernel 5.15.0-86
- User "webapp" -> NOPASSWD sudo for /usr/bin/find
- /etc/cron.d/backup writable

### Onceliklendirme
1. [QUICK WIN] sudo find . -exec /bin/sh \; -quit  (GTFOBins)
   -> tek komut, instant root
2. [BACKUP] cron writable, 5dk sonra otomatik root cmd
3. [KERNEL] PwnKit (CVE-2021-4034) — kernel patched mi check, atla varsayilan

### Onerisi (defansif)
- find sudo'dan kaldir (NOPASSWD scope cok genis)
- cron izinleri root:root 644
- pkexec /usr/bin/pkexec PIE + libc audit
```

## Out-of-Scope

- Persistent backdoor olusturma (engagement disinda)
- Production sistemleri compromise sonrasi degisiklik
- Yetki disinda exploit calistirma