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[Bug Fix] Scan Heap Blocks #3

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[Bug Fix] Scan Heap Blocks #3

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147 changes: 129 additions & 18 deletions Reader/ProcessReader.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
using System.Collections.Generic;
//using System.Diagnostics;

namespace BeaconEye {
public abstract class ProcessReader {
Expand Down Expand Up @@ -46,38 +47,148 @@ int PointerSize() {
return (Is64Bit ? 8 : 4);
}

public List<long> Heaps { get {
public List<long> Heaps
{
get
{

int numHeaps;
long heapArray;
long segmentListEntry;

if (Is64Bit) {

//System.Console.WriteLine("Process Id: " + this.ProcessId);
////Ignore Large Memory Process
//Process p = Process.GetProcessById(this.ProcessId);
//if (p.PrivateMemorySize64 / (1024 * 1024) > 200)
//{
// return new List<long>();
//}

//if (p.ProcessName == "explorer")
//{
// return new List<long>();
//}

if (Is64Bit)
{
numHeaps = ReadMemory<int>(PebAddress + 0xE8);
heapArray = ReadPointer(PebAddress + 0xF0);
} else {

}
else
{
numHeaps = ReadMemory<int>(PebAddress + 0x88);
heapArray = ReadPointer(PebAddress + 0x90);
}

var heaps = new List<long>();
for (int idx = 0; idx < numHeaps; ++idx) {
var heap = ReadPointer((ulong)(heapArray + (idx * PointerSize())));

if (IsSegmentHeap(heap)) {
var segmentListEntryForward = ReadPointer((ulong)heap + 0x18);
var segmentBase = ReadPointer((ulong)heap + 0x30);

while (!heaps.Contains(segmentBase)) {
heaps.Add(segmentBase);
segmentListEntryForward = ReadPointer((ulong)segmentListEntryForward + (ulong)PointerSize());
segmentBase = ReadPointer((ulong)segmentListEntryForward + 0x30);
}
for (int idx = 0; idx < numHeaps; ++idx)
{
var heap = ReadPointer((ulong)(heapArray + (idx * (Is64Bit ? 8 : 4))));
long segmentEnd;
short xorkey;

//Get Heap Entry Xor Key
if (Is64Bit)
{
xorkey = ReadMemory<short>((ulong)heap + 0x88);
}
else
{
xorkey = ReadMemory<short>((ulong)heap + 0x50);
}

} else {
//Get SegmentListEntry
if (Is64Bit)
{
segmentListEntry = ReadPointer((ulong)heap + 0x18) - 0x18;
}
else
{
segmentListEntry = ReadPointer((ulong)heap + 0x10) - 0x10;
}
//Record LinkList
if (Is64Bit)
{
segmentEnd = ReadPointer((ulong)heap + 0x18 + 0x08) - 0x18;
}
else
{
segmentEnd = ReadPointer((ulong)heap + 0x10 + 0x04) - 0x10;
}

//TODO: Handle Windows 10 Segment Heap
heaps.Add(heap);
heaps.Add(segmentListEntry);
while (ReadPointer((ulong)segmentListEntry) != ReadPointer((ulong)segmentEnd))
{
if (Is64Bit)
{
segmentListEntry = ReadPointer((ulong)(segmentListEntry) + 0x18) - 0x18;
//Calculate Heap Entry

//Check Segment Signature
if (!IsSegmentHeap(segmentListEntry)) {
break;
}

//Record Fisrt And End
long firstHeapEntry = ReadPointer((ulong)segmentListEntry + 0x40);
long lastHeapEntry = ReadPointer((ulong)segmentListEntry + 0x48);

//If FirstHeapEntry Is Not Null
if (firstHeapEntry != 0)
{
short firstHeapSize;
try
{
firstHeapSize = ReadMemory<short>((ulong)firstHeapEntry + 0x08);
}
catch (System.Exception e)
{
//Can't Read Size
break;
}

while (firstHeapEntry <= lastHeapEntry)
{
//Decrypt Size
int decryptSize = firstHeapSize ^ xorkey;

//If Size Is Zero
if (decryptSize == 0)
{
break;
}

//Get Unused Bytes
byte unusedByteCount = ReadMemory<byte>((ulong)firstHeapEntry + 0x0f);

//Get Next Entry
firstHeapEntry = firstHeapEntry + 0x10 * decryptSize;
heaps.Add(firstHeapEntry);
try
{
firstHeapSize = ReadMemory<short>((ulong)firstHeapEntry + 0x08);
}
catch (System.Exception e)
{
//Can't Read Address
break;
}
}
}
}
else
{
segmentListEntry = ReadPointer((ulong)(segmentListEntry) + 0x10) - 0x10;
}
heaps.Add(segmentListEntry);
if (segmentListEntry == segmentEnd)
{
break;
}
}
heaps.Add(heap);
}

return heaps;
Expand Down