WPA2-PSK handshake capture + crack → LAN access
Deauth a connected client to force re-association, capture the 4-way handshake with airodump-ng, crack the PSK offline with hashcat.
§ Context
Assumed environment: target Wi-Fi is WPA2-PSK (not enterprise). At least one client is currently associated. Attacker is in RF range with a monitor-mode-capable card.
§ Steps
- 01Authenticate to the networkInitial AccessT1078— Valid Accounts
- 02hashcat -m 22000 offlineCredential AccessT1110— Brute Force
- 03airodump-ng → enumerate APs + clientsReconnaissanceN-ARP-RECON— ARP Sweep / LAN Discovery
- 04Internal nmap + LLMNR poisonDiscoveryN-NMAP-INTERNAL— Internal Nmap Sweep
- 05Capture 4-way handshakeCredential AccessWIFI-WPA2-PSK— WPA2-PSK Handshake Capture + Crack
- 06aireplay-ng deauth a clientImpactWIFI-DEAUTH— Deauthentication DoS
§ References
- T1078Valid Accounts
- T1110Brute Force
§ Frequently asked
- What is the "WPA2-PSK handshake capture + crack → LAN access" attack path?
- Deauth a connected client to force re-association, capture the 4-way handshake with airodump-ng, crack the PSK offline with hashcat. It chains 6 steps drawn from real-world offensive-security techniques.
- What starting position does this attack require?
- The first step is Authenticate to the network (T1078) — a initial access primitive. Assumed environment: target Wi-Fi is WPA2-PSK (not enterprise).
- What is the final impact of this kill-chain?
- The final step lands on aireplay-ng deauth a client (WIFI-DEAUTH), which falls under Impact. From here, an operator typically pivots into post-exploitation or maintains persistence.
- How can defenders detect or prevent this attack?
- Detection and prevention vary per step. Refer to each linked MITRE ATT&CK entry under "References" — every technique on that page lists defensive controls, detection telemetry, and known threat-actor usage.
§ Related dossiers
- Shared techniques3
Evil twin + captive portal → credential harvest
Spoof the corporate SSID with a stronger signal and a captive portal that looks like the company AD login. Auto-connecting clients submit creds to the attacker page.
- Shared techniques3
PMKID attack → offline crack with no client interaction
WPA2 PMKID can be extracted from a single association attempt with the AP — no client needed. hcxdumptool + hashcat -m 22000 yields the PSK if it's weak.
- Shared techniques3
802.1X NAC bypass via printer MAC spoof
Plug into the LAN, sniff a printer / IP-phone MAC, clone it on your laptop, get full LAN access via MAC-Auth-Bypass — bypass NAC entirely.
- Shared techniques2
Industroyer2 IEC-104 substation hijack
Timed payload speaks IEC-60870-5-104 to substation RTUs at attacker-chosen hour; sends 'open breaker' commands across a substation, blackouts a grid section.
- Shared techniques2
Dev workstation → cloud backup keys → encrypted vault store (LastPass 2022)
Attacker compromised a single LastPass DevOps engineer's home machine via outdated Plex Media Server, harvested AWS keys for the encrypted-vault backup bucket, exfiltrated production vault data.
- Shared techniques2
z/OS TN3270 → RACF userID brute → mainframe shell
Internet-/intranet-exposed TN3270 mainframe terminal. Userids follow predictable HR scheme. Brute-force passwords; many environments allow short / dictionary passwords for legacy reasons.