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Convert XCP to section based; add note

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This commit is contained in:
Matt Nadareski
2021-09-08 09:58:11 -07:00
parent e798ba1104
commit 198c320ad8
1 changed files with 50 additions and 21 deletions
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71
BurnOutSharp/ProtectionType/XCP.cs
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@@ -3,6 +3,8 @@ using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using BurnOutSharp.ExecutableType.Microsoft;
using BurnOutSharp.FileType;
using BurnOutSharp.Matching;
@@ -14,28 +16,9 @@ namespace BurnOutSharp.ProtectionType
/// <inheritdoc/>
public List<ContentMatchSet> GetContentMatchSets()
{
// TODO: Obtain a sample to find where this string is in a typical executable
return new List<ContentMatchSet>
{
// Found in GO.EXE
// XCP.DAT
new ContentMatchSet(new byte?[] { 0x58, 0x43, 0x50, 0x2E, 0x44, 0x41, 0x54 }, "XCP"),
// Found in GO.EXE
// XCPPlugins.dll
new ContentMatchSet(new byte?[]
{
0x58, 0x43, 0x50, 0x50, 0x6C, 0x75, 0x67, 0x69,
0x6E, 0x73, 0x2E, 0x64, 0x6C, 0x6C
}, "XCP"),
// Found in GO.EXE
// XCPPhoenix.dll
new ContentMatchSet(new byte?[]
{
0x58, 0x43, 0x50, 0x50, 0x68, 0x6F, 0x65, 0x6E,
0x69, 0x78, 0x2E, 0x64, 0x6C, 0x6C
}, "XCP"),
// xcpdrive
new ContentMatchSet(new byte?[]
{
@@ -45,7 +28,53 @@ namespace BurnOutSharp.ProtectionType
}
/// <inheritdoc/>
public string CheckContents(string file, byte[] fileContent, bool includeDebug = false) => null;
public string CheckContents(string file, byte[] fileContent, bool includeDebug = false)
{
// Get the sections from the executable, if possible
PortableExecutable pex = PortableExecutable.Deserialize(fileContent, 0);
var sections = pex?.SectionTable;
if (sections == null)
return null;
// Get the .rdata section, if it exists
var rdataSection = sections.FirstOrDefault(s => Encoding.ASCII.GetString(s.Name).StartsWith(".rdata"));
if (rdataSection != null)
{
int sectionAddr = (int)rdataSection.PointerToRawData;
int sectionEnd = sectionAddr + (int)rdataSection.VirtualSize;
var matchers = new List<ContentMatchSet>
{
// XCP.DAT
new ContentMatchSet(
new ContentMatch(new byte?[] { 0x58, 0x43, 0x50, 0x2E, 0x44, 0x41, 0x54 }, start: sectionAddr, end: sectionEnd),
"XCP"),
// XCPPlugins.dll
new ContentMatchSet(
new ContentMatch(new byte?[]
{
0x58, 0x43, 0x50, 0x50, 0x6C, 0x75, 0x67, 0x69,
0x6E, 0x73, 0x2E, 0x64, 0x6C, 0x6C
}, start: sectionAddr, end: sectionEnd),
"XCP"),
// XCPPhoenix.dll
new ContentMatchSet(
new ContentMatch(new byte?[]
{
0x58, 0x43, 0x50, 0x50, 0x68, 0x6F, 0x65, 0x6E,
0x69, 0x78, 0x2E, 0x64, 0x6C, 0x6C
}, start: sectionAddr, end: sectionEnd),
"XCP"),
};
string match = MatchUtil.GetFirstMatch(file, fileContent, matchers, includeDebug);
if (!string.IsNullOrWhiteSpace(match))
return match;
}
return null;
}
/// <inheritdoc/>
public ConcurrentQueue<string> CheckDirectoryPath(string path, IEnumerable<string> files)