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Convert Microsoft CAB SFX to string finding

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This commit is contained in:
Matt Nadareski
2022-12-09 15:13:46 -08:00
parent 3cfe9138a5
commit ad16260c53
1 changed files with 12 additions and 29 deletions
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41
BurnOutSharp/PackerType/MicrosoftCABSFX.cs
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@@ -2,8 +2,8 @@ using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using BurnOutSharp.Interfaces;
using BurnOutSharp.Matching;
using BurnOutSharp.Tools;
using BurnOutSharp.Wrappers;
@@ -29,38 +29,21 @@ namespace BurnOutSharp.PackerType
if (name?.Equals("WEXTRACT.EXE", StringComparison.OrdinalIgnoreCase) == true)
return $"Microsoft CAB SFX {GetVersion(pex)}";
// Get the .data/DATA section, if it exists
var dataSectionRaw = pex.GetFirstSectionData(".data") ?? pex.GetFirstSectionData("DATA");
if (dataSectionRaw != null)
// Get the .data/DATA section strings, if they exist
List<string> strs = pex.GetFirstSectionStrings(".data") ?? pex.GetFirstSectionStrings("DATA");
if (strs != null)
{
var matchers = new List<ContentMatchSet>
{
// wextract_cleanup
new ContentMatchSet(new byte?[]
{
0x77, 0x65, 0x78, 0x74, 0x72, 0x61, 0x63, 0x74,
0x5F, 0x63, 0x6C, 0x65, 0x61, 0x6E, 0x75, 0x70,
}, "Microsoft CAB SFX"),
};
string match = MatchUtil.GetFirstMatch(file, dataSectionRaw, matchers, includeDebug);
if (!string.IsNullOrWhiteSpace(match))
if (strs.Any(s => s.Contains("wextract_cleanup")))
return $"Microsoft CAB SFX {GetVersion(pex)}";
}
// Get the .text section, if it exists
if (pex.ContainsSection(".text"))
{
var matchers = new List<ContentMatchSet>
{
/* This detects a different but similar type of SFX that uses Microsoft CAB files.
Further research is needed to see if it's just a different version or entirely separate. */
// MSCFu
new ContentMatchSet(new byte?[] { 0x4D, 0x53, 0x43, 0x46, 0x75 }, "Microsoft CAB SFX"),
};
string match = MatchUtil.GetFirstMatch(file, pex.GetFirstSectionData(".text"), matchers, includeDebug);
if (!string.IsNullOrWhiteSpace(match))
// Get the .text section strings, if they exist
strs = pex.GetFirstSectionStrings(".text");
if (strs != null)
{
// This detects a different but similar type of SFX that uses Microsoft CAB files.
// Further research is needed to see if it's just a different version or entirely separate.
if (strs.Any(s => s.Contains("MSCFu")))
return $"Microsoft CAB SFX {GetVersion(pex)}";
}